taxonID	type	description	language	source
F1704704D655AD28FF1AFB70FDAC8C67.taxon	description	Redescription. Vertex distinctly projected anteriad beyond eyes, about 1.3 – 1.8 × as long as wide; anterior margin angulate; lateral margins subparallel to converged anteriad; carinae distinctly ridged except median carina obsolete; submedian carinae meeting on fastigium. Frons about 2.5 – 3.0 × as long as wide, widest near midlength, narrowed in apical 1 / 3; median carina usually forked in apical 1 / 3. Rostrum reaching or distinctly exceeding mesocoxae. Antennae terete; segment I about as long as wide; segment II about 2.3 – 3.8 × as long as wide. Pronotum about 0.7 – 0.8 × as long as vertex, about 1.2 – 1.3 × as wide as head; carinae distinctly ridged; lateral carinae diverging posteriad, reaching posterior margin. Mesonotum about 2.0 – 2.5 × as long as pronotum; carinae distinctly ridged except median carina obsolete near scutellum. Forewings distinctly exceeding abdomen, mostly subparallel, widest at apical 1 / 3 (near nodal line), rounded apically; ScP + R forked before CuA fork; C 1 longer than C 5; venation with ScP, RA and RP unbranched, MP 3 - branched, CuA 4 - branched (rarely 3 - branched); anal veins fused in basal half of clavus, reaching wing margin before apex of clavus. Metatibiae with two lateral spines. Hind legs with spinulation: tibial apex with 5 (2 + 3) spinules, basitarsus with 7 (2 + 5) spinules, second tarsomere with 4 (rarely 5) spinules. Post-tibial spur cultrate, tectiform, shorter than basitarsus, with about 12 – 26 teeth on posterior margin. Male genitalia: Pygofer triangular in lateral view, higher than wide, usually slightly produced caudad in dorsal half of caudal margin; oval in caudal view, higher than wide, angulate at lateral sides of opening for gonostyles; diaphragm broad, usually without armature. Suspensorium usually short in anterior view, narrowed to widened dorsally, with concavity. Gonostyles sinuate in lateral view; forceps-shaped in ventrocaudal view, narrow to broad, with very short to long basal angles. Aedeagus long, fine, sinuate. Phallotheca narrow to broad in lateral view, usually terminating into one or two downcurved processes; opening for aedeagus usually on left or caudal side. Anal tube rectangular in lateral view; ventral margin flat or bearing one (rarely two) pairs of processes. Female genitalia: Pygofer nearly as long as gonoplacs in ventral view, usually mostly covered with gonoplacs. Gonocoxae VIII broad in ventral view, produced medially at base, narrowed to apices. Gonapophyses VIII slender in ventral view, nearly smooth to strongly serrated on lateroapical parts. Gonapophyses IX broad in dorsal view, dorsal margin with variously shaped teeth in apical 1 / 3 to 2 / 3. Gonoplacs usually very broad (rarely slender) in ventral view, semicircular.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D655AD28FF1AFB70FDAC8C67.taxon	discussion	Remarks. In East Asian stenocranine genera, Stenocranus can be easily distinguished from Terauchiana and Preterkelisia by its relatively short vertex, which is less than twice as long as wide. In this study, Japanese species of Stenocranus are classified into four species groups based on the investigation of male and female genitalia. Additionally, a part of current Stenocranus species should be separated as an independent genus, for which a new genus is established in this study. In a previous investigation of the Matsumura collection, two Stenocranus species described from Japan (Matsumura 1935 a) were recognized to belong to the genus Sogata Distant (Delphacinae), which is similar in habitus to Stenocranus (Fujinuma 2016). Moreover, Stenocranus hopponis Matsumura from Taiwan may belong to Sogata, as the syntypes are similar to the holotype of Sogata nigrifrons (Muir) from Taiwan in BPBM. Furthermore, Stenocranus pacificus Kirkaldy, distributed in southern Japan, is suspected to be congeneric with Sogata or a related genus based on aedeagal morphology (Fujinuma & Hayashi 2015) and molecular evidence (Yashiro & Sanada-Morimura 2022). Japanese specimens are apparently identical to the holotype of S. pacificus in BPBM. Intraspecific color variation, expressed as two seasonal forms, is observed in Japanese Stenocranus planthoppers (except S. sapporensis) distributed in temperate regions. In most species, the winter form (Figs 1 A, 1 D, 1 J, 3 A) is darker in body coloration than the summer one (Figs 1 B, 1 E, 2 A, 3 B), whereas in a few species, the winter form is paler (Figs 1 H, 2 B, 2 D) than the summer one (Figs 1 I, 2 C, 2 E). The winter form occurs from September, usually overwinters as adults, and females lay eggs in the following spring. The summer form occurs from June to August. The occurrence of seasonal forms may be controlled by photoperiodic conditions, as observed in another stenocranine planthopper, T. singularis (Kisimoto 1996, Fujinuma 2016). Grouping of the species Based on morphological characters of the male and female genitalia, 10 Stenocranus species can be classified into four species groups. The key characters considered for the classification are the shape of suspensorium, gonostyles, phallotheca, and gonapophyses VIII and IX. The niisimai group Male genitalia: Suspensorium elongated dorsally, connected with ventrobasal process of anal tube (Figs 6 A, 9 A); gonostyles short and broad, directed medially at apices, with long basal angles (Fig. 6 I); phallotheca divided into left and right parts along ventral slit, slender in lateral view, flattened laterally in apical half, with two apical processes (Fig. 6 E). Female genitalia: Gonapophyses VIII nearly smooth on lateroapical parts (Fig. 7 C); gonapophyses IX very broad in dorsal view, with row of blunt teeth in apical 2 / 3 (Figs 8 A, 8 I). This group represented by a single species, S. niisimai Matsumura, feeding on Phragmites spp. (Poaceae). The tamagawanus group Male genitalia: Suspensorium short, narrowed dorsally, with shallow concavity (Fig. 6 B); gonostyles long, broad, directed medially at apices, with long basal angles (Fig. 6 J); phallotheca with ventral slit, broad in lateral view, flattened laterally in apical half, with one apical process (Fig. 6 F). Female genitalia: Gonapophyses VIII serrated on lateroapical parts (Fig. 7 D); gonapophyses IX as in niisimai group (Figs 8 B, 8 J). This group represented by a single species, S. tamagawanus Matsumura, dependent on Phalaris arundinacea L. (Poaceae). The sapporensis group Male genitalia: Suspensorium short, widened dorsally, with deep concavity (Fig. 6 C); gonostyles long, narrow, directed dorsomedially at apices, with short basal angles (Fig. 6 K); phallotheca without ventral slit, broad in lateral view, not flattened laterally in apical half, with one apical process (Fig. 6 G). Female genitalia: Gonapophyses VIII as in tamagawanus group (Figs 7 E, 7 F); gonapophyses IX moderately broad in dorsal view, with partly two rows of acute teeth in apical 1 / 3 (Figs 8 C – E, 8 K – M). This group comprises four species, feeding on sedges (Cyperaceae). The takasagonis group Similar to sapporensis group in suspensorium (Fig. 6 D), gonostyles (Fig. 6 L), gonapophyses VIII and IX (Figs 7 A, 7 G, 8 F, 8 N) but differing in phallotheca with two apical processes (Fig. 6 H). This group comprises four species, feeding on sedges (Cyperaceae).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D651AD24FF1AFE6CFAA3882F.taxon	description	(Figs 1, 3, 4, 6 – 11, 15)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D651AD24FF1AFE6CFAA3882F.taxon	materials_examined	Type material examined. Holotype ♀ (SEHU), “ Japan [Niijima Teshio (in Japanese)] DR. MATSUMURA. // Niijimae sp. nov. det. Dr. Matsumura // (red label) Type Matsumura ”. Lectotype ♀ of S. breviceps (here designated; SEHU), “ Sapporo DR. MATSUMURA. // St. breviceps M. det. Dr. Matsumura // N // (red label) Type Matsumura ”. Paralectotypes of S. breviceps: 1 ♀ (SEHU), same data as lectotype; 1 ♂ 1 ♀ (SEHU), “ Sapporo Matsum, (underside) 26 / V // Stenocranus breviceps Matsum. ”. Other material examined. [Hokkaido] 1 ♀ (MH), Misumai, Sapporo, 4. VIII. 1983, M. Hayashi; 5 ♂ 5 ♀ (MH), Mt. Kenashi-yama, Otaru, 3. VIII. 2023, M. Hayashi; 1 ♀ (MH), Yanagizaki, Esashi, 6. X. 2010, M. Hayashi et al.; [Honshu] 1 ♂ 4 ♀ (MH), Kurohama, Hasuda, Saitama Pref., 22. IV. 1999, S. Ishida; 3 ♂ 4 ♀ (MH), same data except 6. VIII. 1999; 1 ♂ 2 ♀ (MH), Heirinji, Iwatsuki, Saitama Pref., 16. VII. 1999 (light trap), S. Ishida; 2 ♂ 5 ♀ (MH), Murakuni, Iwatsuki, Saitama Pref., 15. VII. 1999 (light trap), S. Ishida; 4 ♂ 8 ♀ (MH), Higashiwada, Sakado, Saitama Pref., 12. V. 1999, T. Nakata; 59 ♂ 55 ♀ (MH), same data except 18. X. 1999; 35 ♂ 47 ♀ (MH), Niihori, Hidaka, Saitama Pref., 30. VI. 1999, T. Nakata; 21 ♂ 18 ♀ (MH), same data except 2. XI. 1999, T. Nakata; 7 ♂ 3 ♀ (MH), Nagatoro, Saitama Pref., 8. VIII. 2006 (light trap), M. Hayashi et al.; 75 ♂ 28 ♀ (MH), same data except 19. VI. 2007 (light trap); 31 ♂ 13 ♀ (MH), same data except 7. VIII. 2007 (light trap); 18 ♂ 12 ♀ (MH), same data except 4. IX. 2007; 8 ♂ 2 ♀ (MH), same data except 6. XI. 2007; 3 ♂ 3 ♀ (MH), Makuyama Park, Yugawara, Kanagawa Pref., 18. VII. 2015 (light trap), M. Hayashi et al.; 3 ♂ 3 ♀ (MH), same data except 9. VII. 2016; 18 ♂ 14 ♀ (MH), Kakuma Valley, Sanada, Nagano Pref., 5. IX. 1996, M. Hayashi et al.; 2 ♂ 2 ♀ (MH), Uchikubo, Miyama, Kyoto Pref., 13. XI. 1995, M. Sueyoshi; 2 ♂ (MH), Hamasaka, Mikata, Hyogo Pref., 15. VII. 1995, M. Sueyoshi; 2 ♀ (MH), Yuge, Kumenan, Okayama Pref., 15. VII. 1989, M. Hayashi; 1 ♂ (MH), Sugezawa, Nichinan, Tottori Pref., 7. V. 2003, M. Sueyoshi; [Kyushu] 2 ♂ 2 ♀ (MH), Ideno, Mitsuse, Saga Pref., 9. XI. 1995, M. Hayashi et al.; 3 ♂ 3 ♀ (SF), Mt. Shaka-dake, Hita, Oita Pref., 22. VI. 2019, T. Nozaki; 1 ♀ (MH), Yanase, Kokonoe, Oita Pref., 6. VII. 1996, M. Hayashi et al.; 1 ♂ (MH), Oriuzako, Miyazaki, Miyazaki Pref., 25. XI. 1996, M. Hayashi et al.; [Tsushima Is.] 1 ♂ (MH), Tanohama, Kami-agata, 27. X. 2002, M. Hayashi et al.; 1 ♀ (MH), Kuwa, Izuhara, 29. X. 2002, M. Hayashi et al.; [Shimo-Koshiki Is.] 1 ♀ (SF), Aose, Satsumasendai, Kagoshima Pref., 11. VII. 2014 (light trap), T. Nozaki; [Amami-Oshima Is.] 1 ♂ (RUMF), Mt. Yuwan, 16. X. 1988, S. Azuma.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D651AD24FF1AFE6CFAA3882F.taxon	description	Redescription. General coloration stramineous, paler in summer form. Vertex with anterolateral compartments darker. Frons with dark stripes along submedian carinae. Genae with dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum widely whitish, fringed with orange stripes. Mesonotum usually with short dark stripes along inner and outer margins of lateral carinae (stripes sometimes lacking in summer form). Forewings translucent, brownish; veins darker; dark markings on apices of apical veins; dark stripes on membrane (rarely with large dark stripes from base to apex of forewings). Legs with dark stripes. Male pygofer stramineous except anterior margin narrowly darker. Vertex about 1.4 × as long as wide. Frons about 2.8 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 2.6 × as long as wide. Pronotum about 0.8 × as long as vertex. Mesonotum about 2.4 × as long as pronotum. Forewing venation: ScP, RA, and RP unbranched, MP 3 - branched, CuA 4 - branched. Hind leg spinulation: tibia 5 (2 + 3), basitarsus 7 (2 + 5), 2 nd tarsomere 4. Post-tibial spur with 18 – 22 fine teeth on posterior margin. Body length (mean): ♂ 5.2 – 5.6 mm (5.4 mm); ♀ 5.9 – 6.2 mm (6.0 mm). Male genitalia: Pygofer triangular in lateral view, weakly produced caudad in dorsal half of caudal margin; oval in caudal view, angulated at lateral sides of opening for gonostyles; diaphragm broad, without armature. Suspensorium rectangular in anterior view, elongated dorsally, without concavity. Gonostyles short, broad in widest view, directed medially at apices; basal angles long, with small process just above corner. Phallotheca basally bifurcated along ventral slit in ventral view, narrow in lateral view; left part short, with apical opening; right part long, laterally flattened apically, with two processes: dorsal process long, slightly downcurved; ventral process long, hooked. Anal tube rectangular in lateral view, widened in apical 2 / 3, with needle-shaped process connected with suspensorium on ventrobasal part; ventral margin with one pair of short processes near basal 1 / 3. Female genitalia: Gonapophyses VIII slender in ventral view, nearly smooth on lateroapical parts. Gonapophyses IX very broad in dorsal view, with 18 – 25 blunt teeth in apical 2 / 3. Gonoplacs semicircular in ventral view, broad, slightly acute in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D651AD24FF1AFE6CFAA3882F.taxon	distribution	Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima Is., Shimo-Koshiki Is., Amami-Oshima Is.), Korea, Taiwan, China, Russian Far East.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D651AD24FF1AFE6CFAA3882F.taxon	discussion	Remarks. This species is very similar to S. fallax Matsumura, particularly in the short dark stripes along submedian carinae of the frons but can be distinguished by the following features: mesonotum usually with short linear dark stripes along inner margins of lateral carinae (lacking in S. fallax), pygofer mostly pale (dark except caudal margin in S. fallax), gonostyles short and broad (slender in S. fallax). Examination of the original description and syntypes of Stenocranus breviceps Matsumura (i. e., S. matsumurai Metcalf) shows that the facial coloration and short gonostyles of the male genitalia are identical to those of S. niisimai. Therefore, S. matsumurai Metcalf should be considered a junior synonym of S. niisimai. Ding (2006) synonymized Stenocranus hongtiaus Kuoh with S. matsumurai and described Stenocranus macromaculatus Ding as a related species of S. matsumurai. The features of the original description of S. macromaculatus (large dark stripes on forewings and the configuration of the male genitalia) are consistent with those of S. niisimai; thus, S. macromaculatus should be considered a junior synonym of S. niisimai. Biological notes. This species occurs in a wide range of habitats, from mountainous regions to coastal wetlands, and feeds on Phragmites australis (Cav.) and Phragmites japonica Steud. (Poaceae). Females lay eggs exclusively in Phalaris arundinacea L. (Poaceae) growing around P. australis in field observations and laboratory rearing. However, adults and nymphs distinctly prefer P. australis, suggesting that P. arundinacea may be used for oviposition. This species is very common throughout Japan Proper and is frequently attracted to light.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D65DAD20FF1AFA34FBBE8E27.taxon	description	(Figs 1, 3, 4, 6 – 11, 15)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D65DAD20FF1AFA34FBBE8E27.taxon	materials_examined	Type material examined. Lectotype ♂ (here designated; SEHU), “ [Tamagawa (= Tama River) (in Japanese)] 7 / 25 // Stenocranus tamagawanus n. // (red label) St. tamagawanus Type ”. Paralectotypes: 1 ♀ (SEHU), same data as lectotype. Lectotype ♂ of S. vittatus (here designated; SEHU), “ 4 / 20 Japan [Toyohira (Sapporo) (in Japanese)] Matsumura // Stenocranus vittatus n. det. Matsumura // (red label) Type Matsumura // 14 a ”. Paralectotypes: 1 ♀ (SEHU), same data as lectotype; 1 ♀ (SEHU), “ 4 / 20 Japan [Toyohira (in Japanese)] Matsumura // Stenocranus vittatus Mats. ”; 1 ♂ (SEHU), “ [Sapporo (in Japanese)] 4.20 // Stenocranus vittatus Matsum. ”. Holotype ♀ of S. koreanus (SEHU), “ [Locality Suigen (= Suwon) Date IV. 13 Collector Hasegawa 1921 (in Japanese)] // 377 // (red label) S. koreanus n. ”. Other material examined. [Hokkaido] 1 ♂ 2 ♀ (MH), Lake Shirarutoro, Shibecha, 30. IX. 1997, K. Ijima; 3 ♂ 2 ♀ (MH), Kosei, Shibecha, 6. V. 1997, K. Ijima; 1 ♀ (SF), Shotoshibetsu, Rikubetsu, Ashoro, 28. VII. 2012, S. Fujinuma; 1 ♂ 1 ♀ (MH), Yanagizaki, Esashi, 6. X. 2010, M. Hayashi et al.; [Honshu] 1 ♂ (MH), Yoriki, Matsuo, Hachimantai, Iwate Pref., 17. VII. 2001, M. Hayashi et al.; 3 ♂ 3 ♀ (MH), Furukawa-Miyazawa, Osaki, Miyagi Pref., 16. VII. 2010 (light trap), M. Hayashi et al.; 3 ♂ 2 ♀ (MH), Kurohama, Hasuda, Saitama Pref., 22. IV. 1999, S. Ishida; 3 ♂ 2 ♀ (MH), same data except 19. VII. 1999; 3 ♂ 10 ♀ (MH), Heirinji, Iwatsuki, Saitama Pref., 8. VIII. 1999, 8. VIII. 1999, S. Ishida; 16 ♂ 15 ♀ (MH), Murakuni, Iwatsuki, Saitama Pref., 22. XI. 1999, S. Ishida; 1 ♂ 2 ♀ (MH), Higashiwada, Sakado, Saitama Pref., 8. VII. 1999, T. Nakata; 3 ♂ 2 ♀ (MH), Niihori, Hidaka, Saitama Pref., 8. VII. 1999, T. Nakata; 2 ♀ (MH), Akigase, Saitama-Urawa, Saitama Pref., 6. VII. 1989, M. Hayashi et al.; 1 ♂ 1 ♀ (MH), same data except 8. IV. 1995; 1 ♀ (MH), Sue, Hatoyama, Saitama Pref., 27. VII. 2010 (light trap), S. Shibazaki; 1 ♂ (MH), Nagatoro, Saitama Pref., 4. XI. 2007, M. Hayashi et al.; 1 ♂ 2 ♀ (SF), Tama Riv., Komaki, Ôme, Tokyo Met., 13. IX. 2014, S. Fujinuma; 7 ♂ 7 ♀ (SF), Lake Biwa, Shinasahicho-Fukamizo, Takashima, Shiga Pref., 25. VII. 2008, S. Fujinuma; 1 ♀ (MH), Hamasaka, Mikata, Hyogo Pref., 15. VII. 1995, M. Sueyoshi; 1 ♂ (MH), Hamasaka-shinden, Tottori City, Tottori Pref., 18. IX. 2003 (light trap), M. Sueyoshi; [Kyushu] 2 ♂ 2 ♀ (TUA), Mt. Hiko, Soeda, Fukuoka Pref., 29. IV. 2008, T. Mita; 1 ♂ 1 ♀ (MH), Hanamure, Kokonoe, Oita Pref., 26. XI. 1996, M. Hayashi et al. 1 ♂ (SF), Mt. Tômi-san, Ushibuka, Amakusa, Kumamoto Pref., 23. VII. 2015 (light trap), T. Nozaki; [Tsushima Is.] 6 ♀ (MH), Tanohama, Kami-agata, 23. X. 2000, M. Hayashi et al.; 1 ♀ (MH), Yakematsu, Mitsushima, 12. VII. 1995, M. Hayashi et al.; [Iki Is.] 2 ♂ (SF), Katsumotocho-Higashifure, 25. III. 2021, T. Nozaki; [Hirado Is.] 1 ♂ 2 ♀ (SF), Nakatsura Riv., 20. VIII. 2017, T. Nozaki.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D65DAD20FF1AFA34FBBE8E27.taxon	description	Redescription. General coloration stramineous, paler in summer form. Vertex with anterolateral compartments slightly darker. Frons with dark stripes feeble and brownish. Genae with dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum widely whitish, fringed with orange stripes. Forewings translucent, brownish; veins paler; long dark stripes on apical 2 / 3 of forewings. Legs with dark stripes (sometimes lacking in summer form). Male pygofer usually stramineous. Vertex about 1.4 × as long as wide. Frons about 2.8 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 2.6 × as long as wide. Pronotum about 0.7 × as long as vertex. Mesonotum about 2.3 × as long as pronotum. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 13 – 18 fine teeth. Body length (mean): ♂ 5.1 – 5.8 mm (5.5 mm); ♀ 5.6 – 6.1 mm (5.8 mm). Male genitalia: Pygofer triangular in lateral view, slightly produced caudad in dorsal half of caudal margin; oval in caudal view, angulated at lateral sides of opening for gonostyles; diaphragm broad without armature. Suspensorium triangular in anterior view, short, narrowed dorsally, with shallow concavity. Gonostyles long in widest view, broad, directed medially at apices; basal angles long, with small protrusion on its corner. Phallotheca with narrow ventral slit in ventral view; broad in lateral view, laterally flattened and weakly produced ventrad in subapical part; apical process long, falcate, slightly recurved at apex. Anal tube rectangular in lateral view; ventral margin with two pairs of short processes near apical 1 / 3. Female genitalia: Gonapophyses VIII slender in ventral view, weakly serrated on lateroapical parts. Gonapophyses IX as in S. niisimai except with 24 – 30 teeth. Gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D65DAD20FF1AFA34FBBE8E27.taxon	distribution	Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima Is., Iki Is., Hirado Is.), Korea, Russian Far East.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D65DAD20FF1AFA34FBBE8E27.taxon	discussion	Remarks. This species can be distinguished from other Japanese congeners by the forewings bearing long dark stripes from near from near base to apex (without other dark markings) and by the gonostyles with long basal angles. Examination of the syntypes of Stenocranus vittatus Matsumura (i. e., S. hokkaidoensis Metcalf) from Japan and the holotype of Stenocranus koreanus Matsumura from Korea shows that these features (frons with brownish stripes, long dark stripes on forewings, and shape of gonostyles) are identical to those of S. tamagawanus. Although S. koreanus has page precedence over S. tamagawanus, the former was described based on a single female specimen, whereas the latter was based on both male and female specimens. Therefore, it is preferable that S. hokkaidoensis and S. koreanus become junior synonyms of S. tamagawanus for stability and universality of nomenclature (ICZN 4 th edition: Recommendation 24 A). The collection date given in the original description of S. koreanus (July 30, 1921) appears to be incorrect, as the specimen label reads April 13, 1921 and the dark coloration of the holotype indicates a winter form. This species (as S. hokkaidoensis) has been suspected by some authors (e. g., Mochida & Okada 1971, Anufriev & Emeljanov 1988) to be S. minutus (Fabricius) or its subspecies. In this study, no distinctive differences were found in the male genitalia. However, the female genitalia can be separated by the shape of the gonapophyses VIII, as illustrated by Asche & Hoch (1983) and Fujinuma (2022). Biological notes. This species is commonly found in lowland and lower mountainous wetlands of the Japan Proper and feeds on Phalaris arundinacea L. (Poaceae). Females lay eggs in sheathes or leaves of the host plant near the ground and coat oviposition holes with powdery wax, as widely observed among Japanese Stenocranus species (except S. niisimai, which uses both powdery wax and cotton-like wax).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D659AD3CFF1AFC2CFAB18EFB.taxon	description	(Figs 1, 4, 6 – 11, 15)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D659AD3CFF1AFC2CFAB18EFB.taxon	materials_examined	Type material examined. Lectotype ♂ (here designated; SEHU), “ 28 / VIII Ziozan (= Jozankei) // Stenocranus sapporensis n. det. Matsumura // (red label) Type Matsumura // 13 a ”. Paralectotypes: 2 ♂ (SEHU), same data as lectotype; 1 ♀ (SEHU), “ [Jozankei (in Japanese)] 8 / 28 // S. sapporensis M. // [Sapporo Hosozu Unka (in Japanese)] ”; 1 ♂ (SEHU), “ 16 / IX Maruyama ”. Holotype ♂ of S. ozenumensis (EUMJ): “ ♂ // 21 IX- 1950 OZE H. HASEGAWA, (underside) [Kamitashiro (in Japanese)] // (red label) HOLOTYPE Stenocranus ozenumensis Ishihara, 1952 ”. Paratype: 1 ♂ (EUMJ): same data as holotype except “ (yellow label) PARATYPE Stenocranus ozenumensis Ishihara, 1952 ”. Other material examined. [Hokkaido] 2 ♂ 1 ♀ (SF), Kônomai, Mombetsu, 1. IX. 2016, S. Fujinuma; 5 ♂ 5 ♀ (MH), Mizuho, Higashiasahikawa, Asahikawa, 3. IX. 2016, M. Hayashi et al.; [Honshu] 2 ♂ 8 ♀ (MH), Matsukawa H. S. (890 m), Hachimantai, Iwate Pref., 27. VIII. 2000, M. Hayashi et al.; 4 ♂ (MH), same data except 9. IX. 2001; 41 ♂ 25 ♀, Appi Highlands, Hachimantai, Iwate Pref., 26. VIII. 2000, M. Hayashi et al.; 5 ♂ 17 ♀ (MH), same data except 12. IX. 2001; 4 ♂ 3 ♀ (MH), Gozaisho (890 m), Hachimantai, Iwate Pref., 27. VIII. 2000, M. Hayashi et al.; 6 ♂ 5 ♀ (MH), Fukenoyu (1,120 m), Kazuno, Akita Pref., 28. VIII. 2000, M. Hayashi et al.; 1 ♂ 1 ♀ (MH), Ôyachi (1,080 m), Kazuno, Akita Pref., 13. IX. 2000, M. Hayashi et al.; 1 ♂ (MH), Naganuma (1,100 m), Kazuno, Akita Pref., 10. IX. 2001, M. Hayashi et al.; 1 ♂ (MH), Ônuma (960 m), Kazuno, Akita Pref., 23. VIII. 2000, M. Hayashi et al.; 5 ♂ 5 ♀ (MH), Tachiyazawa, Shonai, Yamagata Pref., 18. IX. 2010, M. Hayashi et al.; 3 ♂ 2 ♀ (MH), Hakase Pass, Showa, Fukushima Pref., 21. VIII. 2010, M. Hayashi et al.; 6 ♂ 7 ♀ (SF), Yubiso, Minakami, Gunma Pref., 28. VIII. 2011, S. Fujinuma; 4 ♂ 1 ♀ (SF), Yunosawa, Mikuni, Yuzawa, Niigata Pref., 31. VII. 2016, S. Fujinuma; 1 ♀ (MH), Suga-ike (1,320 m), Sanada, Nagano Pref., 4. IX. 1996, M. Hayashi et al.; 3 ♂ 2 ♀ (SF), Norikura Highland, Azumi, Matsumoto, Nagano Pref., 14. IX. 2010, S. Fujinuma; 3 ♂ 2 ♀ (MH), Abô-daira (1,600 m), Hirayu, Gifu Pref., 3. IX. 1991, M. Hayashi.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D659AD3CFF1AFC2CFAB18EFB.taxon	description	Redescription. General coloration brown. Frons and genae mostly darker, carinae paler. Mid-dorsal parts of vertex, pronotum, and mesonotum widely whitish, usually fringed with dark stripes. Forewings with dark markings on apices of apical veins; curved dark stripes on apical half of inner sides. Male pygofer pale to dark brown. Vertex about 1.4 × as long as wide. Frons about 2.6 × as long as wide; two median carinae approximated. Antennal segment II about 2.8 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 12 – 16 fine teeth. Body length (mean): ♂ 5.3 – 5.5 mm (5.4 mm); ♀ 6.0 – 6.3 mm (6.2 mm). Male genitalia: Pygofer triangular in lateral view, slightly produced caudad in dorsal half of caudal margin; oval in caudal view, relatively narrow, acutely angulated at lateral sides of opening for gonostyles; diaphragm broad, without armature. Suspensorium rectangular in anterior view, short, widened dorsally, with deep concavity. Gonostyles narrow in widest view, distinctly curved dorsad in apical part; basal angles very short. Phallotheca broad in lateral view; opening on left side; apical process long, falcate, with short process (rarely missing) at its base on right side. Anal tube elongate in lateral view; ventral margin bluntly angulated near midlength. Female genitalia: Gonapophyses VIII slender in ventral view, strongly serrated on lateroapical parts. Gonapophyses IX broad in dorsal view, with 16 – 19 acute teeth in apical 1 / 3; the teeth strongly diverged into asymmetrical two rows. Gonoplacs semicircular in ventral view, broad, slightly acute, narrow in basal half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D659AD3CFF1AFC2CFAB18EFB.taxon	distribution	Distribution. Japan (Hokkaido, Honshu, Shikoku).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D659AD3CFF1AFC2CFAB18EFB.taxon	discussion	Remarks. This species can be distinguished by the frons with two median carinae and the forewings with curved dark stripes on apical half. Matsumura (1935 b) corrected his former record of Stenocranus minutus (Fabricius) from Hokkaido (Matsumura 1900) to S. sapporensis. In contrast, Ishihara (1949) synonymized S. sapporensis with S. minutus and subsequently described Stenocranus ozenumensis Ishihara, having “ a remarkable black arched marking ” on the forewing as in S. sapporensis, from Honshu (Ishihara 1952). Examination of the type material of S. sapporensis and S. ozenumensis indicates S. sapporensis is not identical to S. minutus but to S. ozenumensis based on the forewing coloration and male genital configurations. Thus, S. ozenumensis is regarded as a junior synonym of S. sapporensis. Biological notes. This species usually inhabits mountainous marshes, particularly in cold climates, and feeds on Scirpus wichurae Boeck. and some Carex sedges (Cyperaceae). Females lay eggs in basal parts of leaves. Unlike other Japanese congeners, this species is probably univoltine, with females laying eggs by late autumn.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D645AD3EFF1AFC08FBEC8EFB.taxon	description	(Figs 1, 4, 9, 10, 12, 15)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D645AD3EFF1AFC08FBEC8EFB.taxon	materials_examined	Type material examined. Lectotype ♂ (here designated; SEHU), “ 28 / VI Japan [Taisanji (in Japanese)] Dr Matsumura // (red label) harimensis n. ”. Paralectotypes: 3 ♂ (SEHU), same data as lectotype. Holotype ♀ of S. elongatus (SEHU), “ Japan Yano [Buzen (in Japanese)] Matsumura // elongatus M. det. Dr. Matsumura // (red label) elongatus Type ”. Other material examined. [Honshu] 5 ♂ 5 ♀ (SF), Kamitakamori, Tsukidate, Kurihara, Miyagi Pref., 29. X. 2022, S. Fujinuma; 5 ♂ 5 ♀ (SF), Watarase Marsh, Fujioka, Tochigi, Tochigi Pref., 4. V. 2011, S. Fujinuma; 2 ♂ 3 ♀ (MH), Hozoji swamp, Mitakaya, Hanyu, Saitama Pref., 15. X. 2012, M. Hayashi et al.; 3 ♂ (SF), same data except 25. IX. 2016, S. Fujinuma; 11 ♂ 4 ♀ (MH), Kurohama, Hasuda, Saitama Pref., 6. VIII. 1999 (light trap), S. Ishida; 8 ♂ (MH), Heirinji, Iwatsuki, Saitama Pref., 8. VIII. 1999, S. Ishida; 1 ♂ (MH), Murakuni, Iwatsuki, Saitama Pref., 15. VII. 1999 (light trap), S. Ishida; 1 ♂ 2 ♀ (MH), Akigase, Urawa, Saitama Pref., 31. I. 1987, M. Hayashi et al.; 3 ♂ (MH), same data except 20. VI. 1990 (light trap); 8 ♂ 15 ♀ (SF), Kitaokawara, Minamiyamashiro, Kyoto Pref., 19. VI. 2015, S. Fujinuma; [Tsushima Is.] 1 ♂ 1 ♀ (MH), Meboro, Kami-agata, 27. X. 2002, M. Hayashi et al.; 1 ♂ (MH), Mt. Ôboshi, Mine, 26. X. 2002, M. Hayashi et al.; 3 ♀ (MH), Sumo, Mitsushima, 26. V. 1999, M. Hayashi et al.; [Minami-Daito Is.] 2 ♀ (MH), Ikenosawa, 18. IV. 1998, M. Hayashi.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D645AD3EFF1AFC08FBEC8EFB.taxon	description	Redescription. General coloration brown, strongly darker in summer form. Frons and genae mostly darker, carinae paler. Mid-dorsal parts of vertex, pronotum, and mesonotum widely whitish, fringed with orange and dark stripes (orange stripes usually lacking in summer form). Forewings translucent, brownish; veins darker particularly in membrane; dark markings on apices of apical veins; dark stripes along MP 3 + 4, the stripes broadly expanded in summer form. Male pygofer pale to dark brown. Vertex about 1.5 × as long as wide. Frons about 2.6 × as long as wide, with median carina forked in apical 1 / 3 (rarely with two median carinae). Antennal segment II about 2.4 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 13 – 16 fine teeth. Body length (mean): ♂ 4.7 – 5.8 mm (5.4 mm); ♀ 5.6 – 6.5 mm (6.0 mm). Male genitalia: Similar to S. sapporensis except pygofer blunter at lateral sides of opening for gonostyles; apical process of phallotheca with short process on its base and minute process on subapex. Female genitalia is also similar to S. sapporensis except gonapophyses IX with 18 – 21 teeth; gonoplacs much rounded and wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D645AD3EFF1AFC08FBEC8EFB.taxon	distribution	Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima Is., Minami-Daito Is.).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D645AD3EFF1AFC08FBEC8EFB.taxon	discussion	Remarks. This species is similar to S. sapporensis in having the dark body and frons rarely with two median carinae, but it can be distinguished by the absence of curved stripes on the forewings and by the presence of a minute subapical process on the phallotheca. Examination of the holotype of Stenocranus elongatus Matsumura from Japan revealed that its habitus and female genital structures are identical to those of S. harimensis. Although S. elongatus has page precedence over S. harimensis, it was described based on a single female specimen, whereas S. harimensis was described based on male and female specimens. Therefore, it is preferable that S. elongatus becomes a junior synonym of S. harimensis for stability and universality of nomenclature (ICZN 4 th edition: Recommendation 24 A). In the original description of S. elongatus, the distribution is erroneously noted as Honshu; the type locality is actually “ Jono in the Prov. Buzen, ” northern Kyushu, western Japan. Biological notes. This species inhabits mountainous to lowland marshes and feeds on Cyperus serotinus Rottb. (Kisimoto 1995), Schoenoplectus triqueter (L.), and Carex dispalata Boott (Cyperaceae). Females lay eggs exclusively in the middle to upper parts of scapes of C. dispalata in spring but shift oviposition sites to the lower parts of leaves in summer, as observed in some congeners feeding on the same host.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D647AD38FF1AFC1EFA9A8923.taxon	description	(Figs 1, 2, 5, 8 – 10, 12, 15)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D647AD38FF1AFC1EFA9A8923.taxon	materials_examined	Type material examined. Lectotype ♂ of S. tateyamanus (here designated; SEHU), “ 11 / VIII 1905 // Tateyama Japan Matsum (u) ra // Stenocranus tateyamanus sp. nov. // (red label) (T) ype ”. Paralectotypes: 2 ♂ 1 ♀ (SEHU), same data as lectotype. Lectotype ♂ of S. sukumonus (here designated; SEHU), “ Japan Matsumura, (under side) [Sukumo (in Japanese)] 1916 28 / VII // (red label) Stenocranus sukumonus n. Type ”. Paralectotypes: 1 ♂ (SEHU), same data as lectotype; 1 ♂ (SEHU), “ Japan Matsumura, (under side) [Sukumo (in Japanese)] 1916 28 / VII // Stenocranus sukumonis (!) Matsum. ”. Other material examined. [Honshu] 2 ♂ 2 ♀ (SF), Nobiru Beach, Higashi-matsushima, Miyagi Pref., 9. IV. 2022, S. Fujinuma; 2 ♂ 1 ♀ (MH), Arai Beach, Arai, Kashima, Ibaraki Pref., 2. VIII. 1997, R. Kisimoto; 5 ♂ 5 ♀ (SF), Kujukuri Beach, Sorigane, Shirako, Chiba Pref., 14. IX. 2014, S. Fujinuma; 2 ♂ 3 ♀ (MH), Kaino, Kihoku, Mie Pref., 3. XI. 1993. R. Kisimoto; [Shikoku] 1 ♂ 3 ♀ (MH), Komatsu Beach, Tokushima, Tokushima Pref., 22. X. 2006. M. Hayashi et al.; 3 ♂ 3 ♀ (MH), Kitaokinosu, Tokushima, Tokushima Pref., 27. X. 2004. M. Hayashi et al.; [Tsushima Is.] 19 ♂ 18 ♀ (MH), Miuda, Kami-tsushima, 27. X. 2001, M. Hayashi et al.; 3 ♂ 3 ♀ (MH), same data except 28. X. 2002; 1 ♀ (MH), Tanohama, Kami-agata, 27. X. 2001, M. Hayashi et al.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D647AD38FF1AFC1EFA9A8923.taxon	description	Redescription. General coloration stramineous, strongly paler in summer form. Frons with broad dark stripes, with distinct pale spots on the stripes. Genae with dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum widely whitish, fringed with orange and dark stripes (stripes usually feeble in summer form). Forewings as in S. harimensis except veins paler in summer form. Male pygofer pale to dark brown. Vertex about 1.4 × as long as wide. Frons about 2.6 × as long as wide, with median carina forked in apical 1 / 3. Antennal segment II about 2.4 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 13 – 15 fine teeth. Body length (mean): ♂ 4.5 – 5.0 mm (4.7 mm); ♀ 5.2 – 5.8 mm (5.5 mm). Male genitalia: Pygofer, suspensorium and anal tube as in S. sapporensis except caudal margin of pygofer strongly rounded. Gonostyles relatively broad in basal half in widest view, apically narrowed, then slightly curved dorsad; basal angles short. Phallotheca broad in lateral view, strongly produced ventrad in subapical part; opening on left side, with small process originating from membranous part of the opening; apical process long and falcate, produced dorsad, then downcurved. Female genitalia: Gonapophyses VIII slender in ventral view, weakly serrated on lateroapical parts. Gonapophyses IX with 13 – 18 teeth, symmetrically diverged basally. Gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D647AD38FF1AFC1EFA9A8923.taxon	distribution	Distribution. Japan (Honshu, Shikoku, Kyushu, Tsushima Is.).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D647AD38FF1AFC1EFA9A8923.taxon	discussion	Remarks. This species can be distinguished by the following features: frontal dark stripes wide with contrasting pale spots; phallotheca widened apically with a large process; phallothecal opening with a small process. The small process probably exhibits geographic variations, as it tends to be longer in eastern Honshu than in more western regions of Japan. Examination of the syntypes of Stenocranus sukumonus Matsumura from Japan shows that these features of S. sukumonus are identical to those of the summer form of this species; therefore, S. sukumonus should be regarded as a junior synonym of this species. Additionally, investigation of the Matsumura collection revealed that some specimens labeled as Stenocranus akashiensis Matsumura include both S. tateyamanus and Sogata hakonensis (Matsumura). Moreover, the features in the original description of S. akashiensis (absence of dark leg stripes, gonostyles diverging to apices) are not identical to Stenocranus species but to Sogata hakonensis (Matsumura), and thus S. akashiensis was treated as a junior synonym of S. hakonensis (Fujinuma 2016). Owing to this confusion, S. akashiensis may have been erroneously treated and illustrated as S. tateyamanus in some publications (e. g., Matsumura & Ishihara 1945, Ishihara 1949). Biological notes. This species strictly inhabits seaside wetlands and feeds on Carex scabrifolia Steud. (Cyperaceae) (Kisimoto 1995). Females lay eggs in basal parts of leaves or sheathes of the host plant. Moreover, numerous adults are sometimes collected from Carex pumila Thunb. growing on sand dune environment.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D641AD3AFF1AFB70FD1B8EFB.taxon	description	(Figs 2, 3, 7 – 10, 12)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D641AD3AFF1AFB70FD1B8EFB.taxon	materials_examined	Holotype: ♂ (ELKU), Okawara, Minamiyamashiro, Kyoto Pref., 6. XI. 1993. R. Kisimoto. Paratypes: [Honshu] 8 ♂ 7 ♀ (ELKU), Sakura Pass, Marubashira, Ayama, Mie Pref., 9. XI. 1993, R. Kisimoto; 2 ♂ 3 ♀ (ELKU), same data as Holotype; 8 ♂ 10 ♀ (ELKU), Hiyoshi, Mizunami, Gifu Pref., 20. VI. 2015, S. Fujinuma; 10 ♂ 10 ♀ (ELKU), same data except 26. VII. 2015, S. Fujinuma.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D641AD3AFF1AFB70FD1B8EFB.taxon	description	Description. General coloration stramineous, darker in summer form. Vertex with anterolateral compartments darker. Frons with dark stripes except along basal half of median carina feeble. Genae slightly darker. Mid-dorsal parts of vertex, pronotum, and mesonotum narrowly whitish (wider in summer form), fringed with orange stripes. Forewings translucent, brownish (smoky in summer form); veins darker, particularly in membrane; dark markings on apices of apical veins; dark stripes on membrane (darker in summer form). Legs with dark stripes. Male pygofer darker. Vertex about 1.7 × as long as wide. Frons about 2.9 × as long as wide; median carina not forked to slightly forked in apical 1 / 3. Antennal segment II about 2.7 × as long as wide. Pronotum about 0.7 × as long as vertex. Mesonotum about 2.0 × as long as pronotum. Forewing venation: ScP, RA, and RP unbranched, MP 3 - branched, CuA 3 - branched. Hind leg spinulation: tibia 5 (2 + 3), basitarsus 7 (2 + 5), second tarsomere 4. Post-tibial spur with 21 – 24 fine teeth. Body length (mean): ♂ 4.3 – 4.8 mm (4.6 mm); ♀ 4.5 – 5.2 mm (4.9 mm). Male genitalia: Pygofer triangular in lateral view, slightly produced caudad in dorsal half of caudal margin; oval in caudal view, relatively narrow, acutely angulated at lateral sides of opening for gonostyles; diaphragm broad, without armature. Suspensorium rectangular in anterior view, short, widened dorsally, with deep concavity. Gonostyles narrow in widest view, distinctly curved dorsad apically; basal angles short. Phallotheca without ventral slit in ventral view; broad in lateral view; opening on left side; apical process long, produced caudad at base, then downcurved at right angle. Anal tube rectangular in lateral view; ventral margin nearly flat, with one pair of minute protrusions near midlength. Female genitalia: Gonapophyses VIII slender in ventral view, weakly serrated on lateroapical parts. Gonapophyses IX broad in dorsal view, with 15 – 18 acute teeth in apical 1 / 3; teeth slightly diverged into asymmetrical two rows. Gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D641AD3AFF1AFB70FD1B8EFB.taxon	distribution	Distribution. Japan (Honshu).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D641AD3AFF1AFB70FD1B8EFB.taxon	discussion	Remarks. This species can be distinguished by the frontal dark stripes lacking along basal half of median carina, and by the apical process of phallotheca downcurved at right angle. This species may be closely related to Stenocranus planus Yang from Taiwan in coloration and structure but differs in the following features: forewings with CuA 3 - branched (4 - branched in S. planus); pygofer narrow in caudal view (wider in S. planus), apical process of phallotheca downcurved at right angle (curved caudad in S. planus); gonapophyses IX with about 14 – 18 teeth (about 10 teeth in S. planus). The record of Stenocranus ozenumensis Ishihara from the Kansai district is identified as this species based on reconfirmation of the specimens recorded by Kisimoto (1995). Biological notes. This species is found in low mountainous wetlands. The host plant was reported as Carex olivacea subsp. confertiflora (Boott) (Cyperaceae) by Kisimoto (1995).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D641AD3AFF1AFB70FD1B8EFB.taxon	etymology	Etymology. The specific name is dedicated to the late Dr Ryoiti Kisimoto in recognition of his contributions to ecology and taxonomy of Delphacidae in Japan.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D643AD35FF1AFBC0FEDF8907.taxon	description	(Figs 2, 3, 5 – 7, 9, 10, 13, 15)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D643AD35FF1AFBC0FEDF8907.taxon	description	In the original description of this species, the collection date is noted as July 11. However, the coloration of the scutellum indicates the winter form. Additionally, all the syntypes (including S. harimensis) are identical to each winter form, and one of them is labeled with the date November 7. Consequently, the collection date on the original description may be erroneously reproduced.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D643AD35FF1AFBC0FEDF8907.taxon	materials_examined	Type material examined. Lectotype ♂ (here designated; SEHU), “ 11. VII // Stenocranus takasagonis Matsum. ”. Other material examined. [Honshu] 2 ♀ (SF), Kamitakamori, Tsukidate, Kurihara, Miyagi Pref., 29. X. 2022, S. Fujinuma; 5 ♂ 5 ♀ (SF), same data except 3. VII. 2023; 1 ♂ 4 ♀ (MH), Hozoji-numa, Mitakaya, Hanyu, Saitama Pref., 25. XI. 2012, M. Hayashi et al.; 2 ♂ 3 ♀ (MH), Kurohama, Hasuda, Saitama Pref., 6. VIII. 1999 (light trap), S. Ishida; 2 ♂ (MH), Heirinji, Iwatsuki, Saitama Pref., 20. IX. 1999 (light trap), S. Ishida; 7 ♂ 2 ♀ (MH), same data except 29. X. 1999; 13 ♂ 19 ♀ (MH), Murakuni, Iwatsuki, Saitama Pref., 22. XI. 1999, S. Ishida; 2 ♂ 1 ♀, Higashiwada, Sakado, Saitama Pref., 7. XI. 1999, T. Nakata; 17 ♂ 14 ♀ (MH), Sue, Hatoyama, Saitama Pref., 15. XI. 2010, S. Shibazaki; 2 ♀ (MH), Sadamine (390 m), Chichibu, Saitama Pref., 14. VIII. 1992, M. Hayashi et al.; 8 ♂ 5 ♀ (SF), Yoanji, Oami-shirasato, Chiba Pref., 28. VI. 2014, S. Fujinuma; 3 ♂ (MH), Osoki, Ôme, Tokyo Met., 9. X. 1986, M. Hayashi et al.; 1 ♂ (MH), Bessho, Hachioji, Tokyo Met., 15. IX. 2010, N. Nakayama; 2 ♂ (MH), Takayacho-Nakashima, Higashihiroshima, Hiroshima Pref., 13. VII. 1999, S. Nakamura; 1 ♀ (MH), Sugezawa, Nichinan, Tottori Pref., 1. VIII. 2003 (light trap), M. Sueyoshi; [Shikoku] 4 ♂ 5 ♀ (MH), Enomura, Nakamura, Kochi Pref., 3. IX. 2004 (light trap), M. Takai; [Kyushu] 2 ♀ (SF), Osetocho-Yukinoura, Saikai, Nagasaki Pref., 20. III. 2016, T. Nozaki; 4 ♂ 2 ♀ (SF), Ikeda, Oniki, Amakusa, Kumamoto Pref., 18. X. 2015, T. Nozaki; [Tsushima Is.] 1 ♀ (SF), Sago, Kami-agata, 14. VIII. 2010 (light trap), S. Fujinuma; 1 ♂ (MH), Tanohama, Kami-agata, 27. X. 2001, M. Hayashi et al.; 1 ♂ (MH), Kuwa, Izuhara, 29. X. 2002, M. Hayashi et al.; [Hirado Is.] 1 ♀ (SF), Haifuku, 5. VIII. 2017 (light trap), T. Nozaki; [Amami-Oshima Is.] 1 ♀ (RUMF), Mt. Yuwan-dake, 16. X. 1988, S. Azuma; 1 ♀ (MH), Ôgachi, Tatsugo, 7. VII. 2005, M. Hayashi et al.; [Okinawa Is.] 1 ♂ (MH), Ura, Kunigami, 16. VII. 1991 (light trap), M. Hiratate; 1 ♀ (MH), Fungawa Dam, Kunigami, 28. VI. 1992, M. Hayashi et al.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D643AD35FF1AFBC0FEDF8907.taxon	description	Redescription. General coloration as in S. harimensis except forewings of summer form distinctly darker particularly in males. Vertex about 1.6 × as long as wide. Frons about 2.7 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 2.4 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 15 – 18 fine teeth. Body length (mean): ♂ 4.7 – 5.1 mm (4.9 mm); ♀ 5.5 – 6.2 mm (5.8 mm). Male genitalia: Similar to S. sapporensis except phallotheca broad in lateral view, with opening on left side, furnished with two apical processes: left process long, falcate; right process long, downcurved, then recurved to right side, with short process on its base. Female genitalia: Similar to S. sapporensis except gonapophyses IX with 15 – 19 teeth, weakly diverged; gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D643AD35FF1AFBC0FEDF8907.taxon	distribution	Distribution. Japan (Honshu, Shikoku, Kyushu, Tsushima Is., Hirado Is., Amami-Oshima Is., Okinawa Is.), Korea, China.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D643AD35FF1AFBC0FEDF8907.taxon	discussion	Remarks. This species is very similar to S. harimensis Matsumura in habitus but can be distinguished by the phallotheca with two apical processes (one in S. harimensis) and the wide gonoplacs (narrower in S. harimensis). Unlike other Japanese congeners, nymphs are mostly dark in the dorsum. The coloration and structures in the original description of Stenocranus rufilinearis Kuoh from Anhui, China are consistent with those of the winter form of this species. Therefore, S. rufilinearis is regarded as a junior synonym of this species. Biological notes. This species inhabits mountainous to lowland marshes and feeds on Schoenoplectiella juncoides (Roxb.) (Cyperaceae). Numerous adults and nymphs were sometimes found with S. harimensis in wetly fallow paddy fields.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64CAD36FF1AFB14FEB1896B.taxon	description	(Figs 2, 5, 7, 9, 10, 13, 16)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64CAD36FF1AFB14FEB1896B.taxon	materials_examined	Type material examined. Lectotype ♀ (here designated; SEHU), “ 20 / X Honkon (= Hong Kong) // S. fallax Mats. ”. Paralectotypes: 7 ♀ (SEHU), same data as lectotype; 2 ♂ 5 ♀ (SEHU), “ 20 / X Honkon ”. Other material examined. [Hokkaido] 2 ♂ 2 ♀ (SF), Nishioka, Toyohira, Sapporo, 21. V. 2016, T. Ban; 1 ♂ (MH), Mizuhori, Esashi, 7. X. 2010, M. Hayashi et al.; [Honshu] 5 ♂ 1 ♀ (MH), Miroku-rindou, Takko, Aomori Pref., 13. IX. 1992, T. Ichita; 3 ♀ (MH), same data except 26. VI. 1993; 3 ♂ (MH), same data except 29. V. 1994; 3 ♂ 1 ♀ (MH), same data except 21. IX. 1997; 2 ♂ 2 ♀ (MH), Mt. Haruna, Harunako, Takasaki, Gunma Pref., 12. X. 2000, R. Kisimoto; 1 ♂ 1 ♀ (SF), Yozawa, Akiruno, Tokyo Met., 2. X. 2016, S. Fujinuma; 1 ♂ 3 ♀ (SF), Kasuga, Saku, Nagano Pref., 19. VI. 2016, S. Fujinuma; 3 ♂ 2 ♀ (SF), same data except 2. X. 2016; 2 ♂ 9 ♀ (SF), Takasucho- Nishibora, Gujo, Gifu Pref., 11. IX. 2010, S. Fujinuma.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64CAD36FF1AFB14FEB1896B.taxon	description	Redescription. General coloration stramineous, paler in summer form, sometimes distinctly darker after overwintering. Frons with dark stripes except in basal 2 / 3 feeble to lacking. Genae with dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum narrowly whitish, fringed with orange stripes (stripes feeble in summer form). Forewings as in S. kisimotoi. Male pygofer dark brown except caudal margin narrowly pale. Vertex about 1.5 × as long as wide. Frons about 3.0 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 2.7 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 17 – 21 fine teeth. Body length (mean): ♂ 4.7 – 5.2 mm (4.9 mm); ♀ 5.0 – 5.7 mm (5.3 mm). Male genitalia: Similar to S. kisimotoi in pygofer, suspensorium and gonostyles. Phallotheca broad in lateral view; opening near caudal side; two apical processes: left process long, falcate; right process short, slightly converged to left process. Anal tube rectangular in lateral view; ventral margin with one pair of small and acute processes produced caudad near midlength. Female genitalia: Similar to S. sapporensis except gonapophyses IX with 17 – 18 teeth, symmetrically diverged basally. Gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64CAD36FF1AFB14FEB1896B.taxon	distribution	Distribution. Japan (Hokkaido, Honshu), China.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64CAD36FF1AFB14FEB1896B.taxon	discussion	Remarks. This species is distinguishable by its frontal dark stripes, which are usually paler in the basal two-thirds, and by the phallotheca with two apical processes, the right being shorter. Ichita (1996) recognized this species from Aomori Prefecture, northern Honshu. Subsequently, Kisimoto & Hayashi (2000) recorded this planthopper as Stenocranus silvicola Vilbaste, a very similar and probably allied to this species originally described from the Russian Far East. Examination of the syntypes of S. fallax, the holotype of S. silvicola photographed in IAES, and other specimens of both species indicates that the specimens recorded by Ichita (1996) are S. fallax based on the following characteristics: two apical processes of the phallotheca converged to the apices (diverged to the apices in S. silvicola), ventral processes of the anal tube produced caudad (curved anteriad in S. silvicola). Biological notes. This species inhabits mountainous to lowland marshes and feeds on Carex dispalata Boott and Carex curvicollis Franch. et Savat (Cyperaceae). The oviposition site on the host plant is similar to that of S. harimensis.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64FAD31FF1AFBB8FC198C8F.taxon	description	(Figs 2, 8 – 10, 13, 16)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64FAD31FF1AFBB8FC198C8F.taxon	materials_examined	Material examined. [Honshu] 2 ♂ 3 ♀ (MH), Inayama, Aomori, Aomori Pref., 31. VIII. 1997, T. Ichita; 6 ♂ 2 ♀ (SF), Kamitakamori, Tsukidate, Kurihara, Miyagi Pref., 24. VII. 2022, S. Fujinuma; 5 ♂ 2 ♀ (SF), same data except 29. X. 2022, S. Fujinuma; 2 ♂ (MH), Sugao-numa, Mitsukaido, Ibaraki Pref., 20. IX. 1996, M. Hayashi et al.; 5 ♂ 5 ♀ (MH), Yanagiyatsu-numa, Namegawa, Saitama Pref., 18. X. 1996, M. Hayashi et al.; 4 ♂ 2 ♀ (MH), Akigase, Saitama-Urawa, Saitama Pref., 20. VI. 1990 (light trap), M. Hayashi et al.; 12 ♂ 11 ♀ (SF), Murakuni, Iwatsuki, Saitama Pref. 26. VI. 2016, S. Fujinuma; 5 ♂ 4 ♀ (SF), same data except 25. IX. 2016, S. Fujinuma; 54 ♂ 60 ♀ (MH), Sugadaira Moor (1,250 m), 25. IX. 1985, M. Hayashi et al.; 98 ♂ 109 ♀ (MH), same data except 3. IX. 1996; 2 ♀ (SF), Ibi Riv., Kaizucho-Fukuoka, Kaizu, Gifu Pref., 20. II. 2011, S. Fujinuma.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64FAD31FF1AFBB8FC198C8F.taxon	description	Redescription. General coloration stramineous, paler in summer form. Frons with dark stripes. Genae with dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum narrowly whitish, fringed with orange and dark stripes (orange stripes usually feeble even in winter form). Forewings as in S. kisimotoi. Male pygofer pale to dark brown. Vertex about 1.6 × as long as wide. Frons about 2.9 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 3.1 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 23 – 26 fine teeth. Body length (mean): ♂ 5.1 – 5.6 mm (5.4 mm); ♀ 6.1 – 6.5 mm (6.3 mm). Male genitalia: Similar to S. kisimotoi except gonostyles much broader; phallotheca broad in lateral view; opening near caudal side; two apical processes: left process long, falcate, slightly angulated; right process long, downcurved at right angle; anal tube with ventral margin bluntly angulated near midlength. Female genitalia: Similar to S. sapporensis except gonapophyses IX with 16 – 20 teeth, symmetrically diverged mostly. Gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64FAD31FF1AFBB8FC198C8F.taxon	distribution	Distribution. Japan (Honshu), China.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64FAD31FF1AFBB8FC198C8F.taxon	discussion	Remarks. This species is similar to S. fallax in coloration and structure but can be distinguished by the following features: face with dark lines from base to apex (paler in basal two-thirds in S. fallax), antennal segment II about 3.1 × as long as wide (shorter in S. fallax), and phallotheca with two apical processes subequal in length (right process shorter in S. fallax). Biological notes. This species is found in lowland to mountainous marshes and feeds on Carex dispalata Boott (Cyperaceae). Adults are usually observed from June to November, and females lay eggs in the host plants in late autumn as in S. sapporensis; thus, this species may overwinter as eggs.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D648AD31FF1AFD9CFBD78A47.taxon	description	(Figs 3, 9, 10, 14, 16)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D648AD31FF1AFD9CFBD78A47.taxon	materials_examined	Material examined. [Hokkaido] 2 ♂ (MH), Futatsuyama, Shibecha, 3. VI. 1997, K. Ijima; 4 ♂ 3 ♀ (MH), Lake Shirarutoro, Shibecha, 19. IV. 1997, K. Ijima; 2 ♀ (MH), Onnenai, Tsurui, 29. VIII. 1995, T. Ichita; [Honshu] 7 ♂ 6 ♀ (SF), Kamitakamori, Tsukidate, Kurihara, Miyagi Pref., 24. VII. 2022, S. Fujinuma; 3 ♂ 4 ♀ (SF), Shimonamai, Oyama, Tochigi Pref., 12. VII. 2014, S. Fujinuma; 4 ♂ 4 ♀ (SF), same data except 19. IX. 2014, S. Fujinuma; 8 ♂ 10 ♀ (SF), Ibi Riv., Kaizucho-Fukuoka, Kaizu, Gifu Pref., 20. II. 2011, S. Fujinuma.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D648AD31FF1AFD9CFBD78A47.taxon	description	Redescription. General coloration stramineous, in summer form strongly paler. Frons with dark stripes. Genae with dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum narrowly whitish, fringed with orange and dark stripes (stripes usually lacking in summer form). Forewings usually without dark markings on apices of apical veins; dark stripes on membrane. Male pygofer pale to dark brown. Vertex about 1.6 × as long as wide. Frons about 2.8 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 2.7 × as long as wide. Forewing venation and hind leg spinulation as in S. niisimai. Post-tibial spur with 16 – 21 fine teeth. Body length (mean): ♂ 4.5 – 5.4 mm (4.9 mm); ♀ 5.0 – 5.9 mm (5.5 mm). Male genitalia: Similar to S. kisimotoi except pygofer slightly triangular in caudal view; gonostyles relatively broad in basal half in widest view; phallotheca broad in lateral view; opening on caudal side; two apical processes: left process long, falcate; right process long, bifurcated near midlength; anal tube without minute projections on ventral margin. Female genitalia: Similar to S. sapporensis except gonapophyses IX with 17 – 19 teeth, mostly symmetrically diverged. Gonoplacs semicircular in ventral view, broad, wider in apical half.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D648AD31FF1AFD9CFBD78A47.taxon	distribution	Distribution. Japan (Hokkaido, Honshu) (new record), China.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D648AD31FF1AFD9CFBD78A47.taxon	discussion	Remarks. This species, hitherto known from China, is newly recorded from Japan. It is similar to S. chenzhouensis in habitus and genitalia but can be distinguished by the following features: forewings mostly without markings (with dark markings on apices of veins in S. chenzhouensis), phallotheca with two apical processes, the right one bifurcated at midlength (right process just downcurved in S. tonghuaensis). Some records identified as Stenocranus akashiensis Matsumura from Hokkaido (Anufriev & Emeljanov 1988, Ijima 2010) are identical to those of this species based on the configuration of the male genitalia. Biological notes. This species inhabits lowland to low mountainous marshes and feeds on Carex dispalata Boott (Cyperaceae). The oviposition site on the host plant is similar to that of S. harimensis. It is sometimes found together with S. harimensis, S. fallax, and S. chenzhouensis in the same sedge grasslands.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD30FF1AFF4CFC8B8B7E.taxon	materials_examined	Type species: Stenocranus agamopsyche Kirkaldy, 1906, here designated.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD30FF1AFF4CFC8B8B7E.taxon	description	Description. Vertex distinctly projected beyond eyes, about 1.7 × as long as wide; anterior margin angulate; lateral margins subparallel; carinae distinctly ridged except median carina obsolete; submedian carinae meeting on fastigium. Frons about 3.0 × as long as wide, widest near midlength, narrowed in apical 1 / 3; median carina forked in apical 1 / 3. Rostrum distinctly exceeding mesocoxae. Antennae terete; segment I slightly longer than wide; segment II about 4.3 – 4.5 × as long as wide. Pronotum about 0.8 × as long as vertex, about 1.2 × as wide as head; carinae distinctly ridged; lateral carinae diverged posteriad, reaching posterior margin. Mesonotum about 2.2 × as long as pronotum; carinae distinctly ridged except median carina obsolete near scutellum. Forewings distinctly exceeding abdomen, mostly subparallel, widest at apical 1 / 3 (near nodal line), rounded apically; ScP + R fork before CuA fork; C 1 longer than C 5; venation with ScP, RA, and RP unbranched, MP and CuA 3 - branched; anal veins fused in basal half of clavus, reaching wing margin before apex of clavus. Metatibiae with two lateral spines. Hind legs with spinulation: tibial apex with 5 (2 + 3) spinules, basitarsus with 7 (2 + 5) spinules, second tarsomere with 5 spinules. Post-tibial spur cultrate, tectiform, shorter than basitarsus, with about 14 – 20 teeth on posterior margin. Male genitalia: Pygofer rectangular in lateral view, higher than wide of ventral margin, strongly produced caudad in dorsal half of caudal margin; oval in caudal view, higher than wide, not angulated at lateral sides of opening for gonostyles; diaphragm broad, without armature. Suspensorium rectangular in anterior view, with small protrusion on left dorsal part. Gonostyles sinuate in lateral view, forceps-shaped in ventrocaudal view, very broad; basal angles relatively long. Aedeagus very slender, sinuate. Phallotheca broad in lateral view, terminating into two downcurved processes; opening for aedeagus on right side. Anal tube rectangular in lateral view; ventral margin bearing one pair of processes. Female genitalia: Pygofer nearly as long as gonoplacs in ventral view, distinctly broader than gonoplacs. Gonocoxae VIII narrow in ventral view, mostly subparallel. Gonapophyses VIII slender in ventral view, nearly smooth on lateroapical parts. Gonapophyses IX relatively broad in dorsal view; dorsal margin with trapezoidal teeth in apical 1 / 3, small concavity before the teeth. Gonoplacs slender in ventral view, mostly subparallel.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD30FF1AFF4CFC8B8B7E.taxon	discussion	Remarks. This new genus is very similar to Stenocranus in coloration and structure but differs in the following features: antennal segment II 4.3 – 4.5 × as long as wide (shorter in Stenocranus), second tarsomere with 5 spines (usually 4 spines in Stenocranus), pygofer strongly produced caudad in dorsal half of caudal margin (weaker in Stenocranus), suspensorium with small dorsal protrusion (absent in Stenocranus), phallotheca with opening on right side (usually left or caudal side in Stenocranus), gonoplacs slender (usually very broad in Stenocranus). The features of pygofer and phallotheca are unique among stenocranine genera and may be regarded as apomorphies. Moreover, the features of the second tarsomere and gonoplacs are shared with two stenocranine genera (Terauchiana Matsumura and Embolophora Stål distributed in Africa). The slender gonoplacs are likely plesiomorphic as they are common in other subfamilies of Delphacidae (Fujinuma 2022). Stenocranus linnapallidus Asche (comb. nov.) may be also transferred to this genus based on the male genital features.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD30FF1AFF4CFC8B8B7E.taxon	etymology	Etymology. This genus name is masculine in gender and formed by combining Greek words, “ ceratos ” (horn, referring to long antennae) and “ cranus ” (head or helmet).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD33FF1AF98DFD268B2B.taxon	description	(Figs 3, 5, 7, 9, 10, 14, 16)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD33FF1AF98DFD268B2B.taxon	materials_examined	Type material examined. Holotype ♀ (BPBM), “ Cairns, Q. Austr. 7 1904. // (red label) Type of agamopsyche Kirk. // Stenocranus agamopsyche 1034 Kirk ”. Lectotype ♂ of S. formosanus (here designated; SEHU), “ Formosa Matsumura, (underside) IV / 26, 1907 [Kagi (= Chiayi) (in Japanese)] // Stenocran. formosanus Mats. // (red label, no letter) ”. Paralectotypes: 1 ♀ (SEHU), same data as lectotype; 1 ♀ (SEHU), “ Formosa Matsumura, (under side) 12 / VII 1906 Akô ”. Other material examined. [Kyushu] 1 ♂ (SF), Sadowaracho-Shimonaka, Miyazaki, Miyazaki Pref., 23. X. 2019, T. Nozaki; [Okinawa Is.] 4 ♂ 12 ♀ (SF), Hiji Riv., Hiji, Kunigami, 16. VII. 2022, S. Fujinuma; 3 ♂ 2 ♀ (SF), Kawata, Higashi, 3 – 4. V. 2010, S. Fujinuma; 1 ♀ (MH), Haneji-Ôkawa, Nago, 16. V. 1993 (light trap), M. Hayashi et al.; 3 ♂ 3 ♀ (SF), Yaka, Kin, 1. V. 2013, S. Fujinuma; [Iriomote Is.] 1 ♂ (MH), Funaura, 28. IX. 1995 (light trap), M. Hayashi et al.; 3 ♂ 2 ♀ (MH), Mitara, 7. XI. 1985, M. Hayashi et al.; 2 ♀ (MH), same data except 24. VI. 1992, M. Hayashi et al.; 2 ♂ 2 ♀ (MH), same data except 15. III. 2000, M. Hayashi et al.; 1 ♂ (SF), Urauchi, 28. XII. 2006, T. Ishizaki.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD33FF1AF98DFD268B2B.taxon	description	Redescription. General coloration stramineous. Frons with distinct dark stripes. Genae with distinct dark stripes. Mid-dorsal parts of vertex, pronotum, and mesonotum paler. Pronotum and mesonotum with dark stripes along lateral margins. Forewings with dark markings on apices of apical veins. Legs with dark stripes. Male pygofer stramineous except anterior margin narrowly to broadly darker. Vertex about 1.7 × as long as wide. Frons about 3.0 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 4.5 × as long as wide. Forewings with venation as in the generic description. Post-tibial spur with 14 – 17 fine teeth. Body length (mean): ♂ 4.7 – 5.0 mm (4.9 mm); ♀ 5.4 – 5.7 mm (5.6 mm). Male genitalia: Pygofer rectangular in lateral view, strongly produced caudad in dorsal half of caudal margin; oval in caudal view; diaphragm broad, weakly concave in dorsomedial part. Suspensorium with very small protrusion on left dorsal part. Gonostyles very broad in widest view, with a small protrusion on inner side of subapex; basal angles with a large and flat process on its corner. Phallotheca broad in lateral view, ridged ventrally; opening on right side of midlength; left part elongated, rounded dorsally; two apical processes: dorsal process long, hooked; ventral process short, falcate. Anal tube rectangular in lateral view; ventral margin with one pair of short processes near midlength. Female genitalia: Gonapophyses VIII, IX, and gonoplacs as in the generic description; gonapophyses IX with 16 – 18 teeth on dorsal margin.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD33FF1AF98DFD268B2B.taxon	distribution	Distribution. Japan (Kyushu, Okinawa Is., Ishigaki Is., Iriomote Is.), Taiwan, China, Philippines (Luzon), South Mariana Isls. (Guam Is.), Western Caroline Isls. (Palau Is., Yap Is.), Australia (Queensland).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D649AD33FF1AF98DFD268B2B.taxon	discussion	Remarks. Japanese specimens of this species are consistent with the original description of Stenocranus philippinensis Muir (junior synonym of this species) in having the gonostyle with a subapical protrusion and the phallotheca with long apical and short basal processes. However, they are partly inconsistent with the holotype in BPBM in habitus. Moreover, the additional description of this species by Kirkaldy (1907) is also partly inconsistent with S. philippinensis, as noted by Fennah (1956). Therefore, the extent of variation of this species should be redefined. Hayashi (1997) newly recorded this species from Japan and suggested the synonymy of this species and Stenocranus formosanus Matsumura from Taiwan. Examination of the syntypes of S. formosanus revealed that the genital structures, particularly the gonostyle with a large and flat process, are identical to those of this species. Thus, S. formosanus should be considered a junior synonym of C. agamopsyche. Biological notes. This species is widely distributed from low mountainous to coastal wetlands in the Ryukyus and feeds on Phragmites australis (Cav.) (Poaceae). Adults and nymphs are assembled around the young leaves of the host plant, and females lay eggs in the basal part of the leaves. This species is probably multivoltine in the Ryukyus and is frequently attracted to lights.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64AAD32FF1AF978FB3C884B.taxon	description	(Figs 3, 7 – 10, 14)	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64AAD32FF1AF978FB3C884B.taxon	materials_examined	Holotype: ♂ (ELKU), Isahaya reclamation area, Isahaya, Nagasaki Pref., 22. IX. 2022, T. Nozaki. Paratypes: [Honshu] 1 ♀ (MH), Tachiyazawa, Shonai, Yamagata Pref., 18. IX. 2010, M. Hayashi et al.; 7 ♂ (ELKU), Kuwadori, Joetsu, Niigata Pref., 17. IX. 2023, S. Fujinuma; 4 ♂ 8 ♀ (ELKU), same data except 11. IX. 2007; 2 ♂ 3 ♀ (ELKU), Yodo Riv., Oyodokita, Kita, Osaka, Osaka Pref., 20 – 22. XI. 2013, T. Ban & N. Inahata; 1 ♀ (MH), Gônokawa Riv., Shimane Pref., 12. VIII. 1999, S. Nakamura; [Shikoku] 1 ♂ (ELKU), Sozu Riv., Ainan, Ehime Pref., 1. VI. 2016. N. Inahata; [Kyushu] 5 ♂ 1 ♀ (ELKU), same data as holotype except 24. V. 2022; 1 ♂ 7 ♀ (ELKU), same data as holotype; 1 ♀ (ELKU), Ikeda, Oniki, Amakusa, Kumamoto Pref., 9. VIII. 2015, T. Nozaki; 3 ♂ 1 ♀ (ELKU), Nagara, Saiki, Oita Pref., 31. VII. 2024, T. Nozaki; [Tsushima Is.] 5 ♀ (MH), Tanohama, Kami-agata, 23. X. 2000, M. Hayashi et al.; [Hirado Is.] 1 ♀ (ELKU), Kota Riv. (estuary), 20. VIII. 2017, T. Nozaki; [Okinawa Is.] 8 ♂ 8 ♀ (ELKU), Kanna Dam, Ginoza, 12. V. 2013, S. Fujinuma; [Iriomote Is.] 10 ♂ 10 ♀ (ELKU), Toyohara, 7 – 8. IX. 2012, S. Fujinuma.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64AAD32FF1AF978FB3C884B.taxon	description	Description. General coloration stramineous, tinged with orange. Frons with distinct dark stripes; sometimes orange stripes along lateral carinae. Genae slightly darker. Mid-dorsal parts of vertex, pronotum, and mesonotum paler, fringed with orange stripes. Pronotum and mesonotum with orange stripes along lateral margins. Forewings with veins paler, except parts of apical veins darker; dark markings on apices of apical veins. Legs mostly without dark stripes. Male pygofer yellowish stramineous. Vertex about 1.7 × as long as wide. Frons about 3.0 × as long as wide; median carina forked in apical 1 / 3. Antennal segment II about 4.3 × as long as wide. Pronotum about 0.8 × as long as vertex; mesonotum about 2.2 × as long as pronotum. Forewing venation: ScP, RA, and RP unbranched, MP 3 - branched, CuA 3 - branched. Hind leg spinulation: tibia 5 (2 + 3), basitarsus 7 (2 + 5), second tarsomere 5. Post-tibial spur with 16 – 20 fine teeth. Body length (mean): ♂ 4.4 – 5.5 mm (5.0 mm); ♀ 5.4 – 6.5 (6.1 mm). Male genitalia: Pygofer rectangular in lateral view; strongly produced caudad in dorsal half of caudal margin; oval in caudal view; diaphragm broad, weakly concave dorsomedially. Suspensorium with small process on left dorsal part. Gonostyles very broad in widest view, widened subapically; basal angles with two small protrusions at corner. Phallotheca broad in lateral view, ridged ventrally; opening on right side; left part elongated, dorsoventrally flattened, with two processes: dorsal process long, falcate, downcurved to right; ventral process long, produced caudad. Anal tube rectangular in lateral view, distinctly widened in apical half; ventral margin with one pair of short processes near midlength. Female genitalia: Gonapophyses VIII, IX, and gonoplacs as in generic description; gonapophyses IX with 15 – 20 teeth on dorsal margin.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64AAD32FF1AF978FB3C884B.taxon	distribution	Distribution. Japan (Honshu, Shikoku, Kyushu, Tsushima Is., Hirado Is., Okinawa Is., Iriomote Is.).	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64AAD32FF1AF978FB3C884B.taxon	discussion	Remarks. This species is similar to C. agamopsyche (Kirkaldy) in habitus and structure but differs in the following features: lateral sides of pronotum and mesonotum pale (with dark stripes in C. agamopsyche), genae slightly darker (mostly darker in C. agamopsyche), gonostyles with two small protrusions on corner of basal angle (with a long and flat process in C. agamopsyche). Nymphs are generally yellowish stramineous, with a whitish vitta on the dorsum fringed with orange stripes (dark stripes in C. agamopsyche). Biological notes. This species is mainly found in coastal wetlands and feeds on Phragmites australis (Cav.) (Poaceae). This species occurs from June to November in temperate regions of Japan. This species and C. agamopsyche apparently occupy the same niche on the host plant, but allopatric in the Ryukyus.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
F1704704D64AAD32FF1AF978FB3C884B.taxon	etymology	Etymology. The species epithet is derived from orange stripes on the face and dorsum.	en	Fujinuma, Satoshi, Hayashi, Masami (2025): Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae). Zootaxa 5706 (3): 301-336, DOI: 10.11646/zootaxa.5706.3.1, URL: https://doi.org/10.11646/zootaxa.5706.3.1
