Cephennodes (s. str.) deviator, Jałoszyński, 2025

Cephennodes (s. str.) deviator sp. nov.

( Figs 189–193 View FIGURES 189–193 )

Type material. Holotype: CHINA (YUNNAN Prov.): ♂, two labels: “CHINA: Yunnan [ CH07-17 ], / Baoshan Pref., mountain range 25 km S / Tengchong , 1900 m, 24º48’28’’N, / 98º32’03’’E, dev. primary decid. forest, / litter, fungi sifted, 2.VI.2007, M. Schülke ” [white, printed]; “ CEPHENNODES (s. str.) / deviator m. / P. Jałoszyński, 2025 / HOLOTYPUS ” [red, printed] ( MNB). GoogleMaps

Diagnosis. Body large, BL around 1.6 mm; antennae gradually thickened and extremely long, also legs conspicuously long; punctures on head, pronotum and elytra fine and inconspicuous; subhumeral lines long, as long as 0.5 × EL. Male: head modified, with elongate median oval impression behind supraantennal tubercles; aedeagus ( Figs 192–193 View FIGURES 189–193 ) in ventral view with capsular region of median lobe with complex shape of strongly asymmetrical distal portion, which bears elongate triangular and pointed projection directed to the right, and with elongate and twisted distal projection, parameres of unequal length and width, each with longitudinal row of numerous setae increasing in length toward apices; sternite VI ( Fig. 190 View FIGURES 189–193 ) posteriorly emarginate; tergite VI ( Fig. 191 View FIGURES 189–193 ) elongate.

Description. Body of male ( Fig. 189 View FIGURES 189–193 ) strongly convex, oval, with barely discernible constriction between pronotum and elytra, moderately light brown with slightly lighter tarsi, covered with light brown setae. BL 1.58 mm.

Head broadest across large and moderately strongly convex, coarsely faceted eyes, HL 0.20 mm, HW 0.40 mm; frontovertexal region distinctly impressed at middle behind supraantennal tubercles, impression shallow, with flattened bottom, broadest anteriorly and narrowing posterad; supraantennal tubercles weakly elevated. Punctures fine, inconspicuous; setae short, sparse and suberect. Antennae conspicuously long and slender, gradually thickened, AnL 1.03 mm, antennomere 1 about as long as broad, 2–7 each weakly elongate, 8–10 each strongly elongate, 11 clearly shorter than 9 and 10 combined, about twice as long as broad.

Pronotum almost subrectangular, moderately strongly convex at middle and flattened near hind corners, broadest at base; PL 0.50 mm, PW 0.70 mm. Anterior margin in strictly dorsal view nearly straight; lateral margins strongly rounded in anterior third and weakly sinuate posteriorly, with shallow constriction in posterior third, finely microserrate, posterior corners nearly right-angled; posterior margin shallowly bisinuate; lateral marginal carinae simple (i.e., not doubled); lateral antebasal pits shallow but distinct, each located slightly closer to posterior than to lateral pronotal margin. Punctures on pronotal disc fine and inconspicuous; setae short and moderately dense, suberect.

Elytra distinctly wider than pronotum, together oval, broadest between middle and anterior third; EL 0.88 mm, EW 0.78 mm, EI 1.13; subhumeral lines developed as sharp borders between elevated humerus and lower mesal region, as long as 0.5 × EL and weakly divergent posterad; basal elytral fovea on each elytron slightly closer to lateral margin of mesoscutellum than to subhumeral line; elytral apices separately rounded. Punctures and setae on elytra similar to those on pronotum.

Hind wings not studied.

Metaventrite with deep lateral impressions about as long as 3/4 of its length.

Legs conspicuously long and slender, unmodified.

Abdomen with sternite VIII ( Fig. 190 View FIGURES 189–193 ) posteriorly emarginate, and tergite VIII ( Fig. 191 View FIGURES 189–193 ) unusually elongate.

Aedeagus ( Figs 192–193 View FIGURES 189–193 ) of strongly modified simonis form,AeL 0.38 mm; in ventral view with capsular region of median lobe with complex shape of strongly asymmetrical distal portion, which bears elongate triangular and pointed projection directed to the right, and with elongate and twisted distal projection; in lateral view median lobe with narrow elongate projection directed dorsad and situated in subapical region; basal foramen hidden in strongly twisted, asymmetrical and modified basal region; parameres of unequal length and width, each with longitudinal row of numerous setae increasing in length toward apices.

Female. Unknown.

Distribution. S China: Yunnan.

Etymology. The Latin adjective deviator means “one who leaves the way” (derived from devio, to go aside, to deviate) and alludes to the odd-shaped aedeagus.

Remarks. Cephennodes deviator externally somewhat resembles members of the genus Hlavaciellus ( Jałoszyński 2006, 2011b, 2021b) in extremely elongate legs and weakly, gradually thickened and conspicuously long antennae. The general body shape, modification of the head and antennomere 11 distinctly shorter than 9 and 10 combined are sufficient to unambiguously identify this species. The aedeagus of C. deviator is unique, odd-shaped, not possible to confuse with genital organs of any other Cephennodes . Moreover, this is the only known Cephennodes species with the abdominal sternite VIII emarginate posteriorly, and with a distinctly elongate tergite VIII.

Subgenus Fusionodes Jałoszyński

Fusionodes Jałoszyński, 2007a: 71 (not valid, no type species designated). Validated by Jałoszyński, 2007c: 359. Type species: Cephennodes hippopotamus Jałoszyński, 2007a View in CoL (des. by Jałoszyński 2007c).

Thirty species are known to occur in China (Fujian, Shaanxi, Sichuan, Yunnan), Japan (Honshu, Kyushu, Shikoku), Russian Far East (Jewish Auton. Obl., Primorie), South Korea, and Vietnam. The diagnosis was given in Jałoszyński (2007a); species from China were treated in Jałoszyński (2007a, b, 2015c), from Japan in Hoshina (2016, 2019b) and Kurbatov (1995), from the Russian Far East and South Korea in Jałoszyński et al. (2005), Kurbatov (1995) and Na et al. (2024), and from Vietnam in Jałoszyński & Nomura (2009).

Some Japanese species described by Hoshina can pose identification problems; this group includes C. koko Hoshina, 2021 (Shikoku), C. sakura Hoshina, 2021 (Kushyu, Shikoku), C. otome Hoshina, 2016 (Honshu), and C. nemu Hoshina, 2021 (Shikoku). Judging from illustrated genitalia, all these species were described based on aedeagi with endophallic structures extruded to various extent, and some of them, or even all, can be identical with C. loebli Kurbatov, 1995 described based on the type material collected in Shikoku. Fortunately, the aedeagus of this group of species (or one species) is not even remotely similar to that of any newly described or previously known Fusionodes from any other country.

Species of this subgenus do not have any male sexual dimorphic characters, and externally are rather unremarkable. The only reliable character to identify them is the aedeagus. Because of a usually complex apical region, it is advisable to illustrate the aedeagus not only in ventral and lateral views, but also in dorsal view, otherwise the shape of some important structures (projections and lobes) cannot be assessed.