Streblocera (Eutanycerus) netrangana Long, 2025

Streblocera (Eutanycerus) netrangana Long , sp. nov.

Figures 5 View FIGURE 5 , 6 View FIGURE 6 , 21 View FIGURE 21

Type material. Holotype, ♀, labelled “Euph. 350 ”, ( IEBR), N Vietnam: Ninh Binh, Trang An, Hang Moi , forest, 20°15’14’’N 105°53’42’’E, 14 m, sweep (nets), 12.vi.2018, KD Long GoogleMaps . Paratype, 1♀, labelled “Euph. 168 ”, ( IEBR), NC Vietnam: Ha Tinh, Huong Son , forest, 18°22’N 106°13’E, 900 m, 20–28.iv.1998, Malaise, AMNH. K. Long GoogleMaps

Diagnosis. Small wasp; scapus expanded apically, without tooth-shaped horn subbasally; sixth–seventh flagellomere with hook-like prominence; length of scapus 6.0 × its maximum width, and 1.5 × of head height (in dorsal view); first flagellomere 1.2 × as long as second flagellomere; malar space 0.8 × as long as basal width of mandible; mesosoma 1.5 × as long as its height; propodeum with transverse carinae medially, and sparse irregular rugosities latero-posteriorly, areola not defined; length of first metasomal tergite 1.9 × as long as its apical width; apical width 2.5 × as long as its minimum width.

Description. Holotype, ♀; body length 2.5 mm, fore wing length 2.2 mm, ovipositor 0.8 mm ( Fig. 5 View FIGURE 5 ).

Head. Antenna with 21 antennomeres; length of scapus 6.0 × its maximum width ( Fig. 6H View FIGURE 6 ); scapus 1.5 × of head height; first flagellomere 1.4 × second flagellomere; second-seventh flagellomeres straight ventrally; sixth–seventh flagellomeres with hook-like protruding processes ( Fig. 6J View FIGURE 6 ); length from eighth flagellomere to apex of antenna 1.3 × scapus; in dorsal view, occipital carina complete medio-dorsally ( Fig. 6A View FIGURE 6 ), width of head 1.6 × its median length, and 1.5 × width of mesoscutum (without tegulae); temple roundly narrowed behind eye; length of eye 1.85 × as long as temple; ocelli small, POL: OD: OOL = 3: 2.5: 6 ( Fig. 6A View FIGURE 6 ); eye 1.85 × as high as broad; in lateral view, transverse diameter of eye 3.25 length of temple; in frontal view, diameter of antennal socket 1.4 × between sockets; face width 0.7 × length of face and clypeus combined, and 1.2 × height of eye ( Fig. 6B View FIGURE 6 ); clypeus margin straight; malar space 0.8 × as long as basal width of mandible, and 0.3 × as long as eye height; upper tooth rather long, 2.3 × lower one ( Fig. 6D View FIGURE 6 ); distance between tentorial pits 3.25 × distance from pit to eye margin; face rugo-punctate ( Fig 6B View FIGURE 6 ); clypeus coriaceous, with sparse fine punctures; frons flat, mostly smooth, sparse short striate rugosities near antennal; temple and vertex polished smooth, with sparse fine punctures ( Fig. 6A View FIGURE 6 ).

Mesosoma. In lateral view, length of mesosoma 1.5 × as long as its height; notauli narrow and sparsely crenulated anteriorly, widened posteriorly fusing into largely rugose area divided by a carina ( Fig. 6E View FIGURE 6 ); prescutellar sulcus wide, deep, 0.6 × as long as scutellum, with one median carina; median lobe of mesoscutum coriaceous anteriorly, rugo-punctate medio-posteriorly ( Fig. 6E View FIGURE 6 ); lateral lobes of mesoscutum and scutellum smooth; pronotal side largely crenulated medially, smooth dorsally and ventrally ( Fig. 6F View FIGURE 6 ); precoxal sulcus short, largely punctate; mesopleuron smooth; metapleuron largely transversely rugose; propodeum with a short basal carina, and transverse carinae medially, and sparse irregular rugosities latero-posteriorly, areola not defined ( Fig. 6G View FIGURE 6 ).

Wings. Length of fore wing 2.75 × its width; length of pterostigma 3.4 × its width, 1.8 × vein 1-R1 ( Fig. 6I View FIGURE 6 ); vein r arising just behind middle of pterostigma, 0.4 × as long as width of pterostigma, and 0.2 × vein 1-R1; vein 1-CU1 short and thick, vein 1-CU1: cu-a: 2-CU1 = 1.5: 3: 10 (0.15 × vein 2-CU1); hind wing: 1-M: 1r-m: 2- SC+R = 2: 5: 5.

Legs. Length of hind femur, tibia and basitarsus 5.0, 14.0 and 7.5 × as long as their maximum width, respectively; hind basitarsus 0.35 × hind tibia, and 0.65 × second–fifth tarsus combined; fourth hind tarsus 0.8 × as long as fifth tarsus (without pretarsus).

Metasoma. Length of first tergite 2.0 × its apical width, apical width of first tergite 3.0 × its minimum width; ovipositor 0.35 × length of fore wing, and 1.3 × length of first tergite; ovipositor curved upwards apically ( Fig. 5 View FIGURE 5 ); first metasomal tergite smooth basally, striate medially and apically ( Fig. 6C View FIGURE 6 ); remaining tergites highly smooth.

Colour. Head and mesosoma yellow; eyes silver-grey; legs and metasoma yellow, except first metasomal tergite medially, apex of metasoma and ovipositor sheath brownish yellow; wing veins yellow; wing membrane hyaline.

Male. Unknown.

Host: Unknown.

Etymology. “ ne ” Latin for “not” and “trangana ” in reference to the type of species having the same locality but different from S. (E.) trangana Long & Pham, 2020 .

Distribution. N Vietnam: Ninh Binh province (Trang An); NC Vietnam: Ha Tinh (Huong Son) ( Fig. 21 View FIGURE 21 ).