Colastomion neuterum Long, 2021

Oanh, Nguyen Thi, Dzuong, Nguyen Van, Long, Khuat Dang, Lam, Pham Van, Nhi, Pham Thi & Hoa, Dang Thi, 2021, Six new braconid wasps of the genus Colastomion Baker, 1917 (Hymenoptera: Braconidae: Rogadinae) from Vietnam, Zootaxa 5040 (2), pp. 215-237 : 226-229

publication ID	https://doi.org/ 10.11646/zootaxa.5040.2.3
publication LSID	lsid:zoobank.org:pub:2951D97F-F2D9-4434-A9D1-BCC3A5FFA4A4
DOI	https://doi.org/10.5281/zenodo.10553286
persistent identifier	https://treatment.plazi.org/id/03C8878C-FF8B-FF80-FF03-5315D1EBDB9D
treatment provided by	Plazi
scientific name	Colastomion neuterum Long
status	sp. nov.

Treatment

Colastomion neuterum Long , sp. n.

Figs 37–55 View FIGURES 37–47 View FIGURES 48–55

Material examined. Holotype, ♀ ( IEBR), “ Rog. 1073 ”, NE Vietnam: Tuyen Quang, Na Hang, Son Phu , forest, MT, 22°17’32’’N 105°28’19’’E, 570m, 15.vii.2018, KD Long GoogleMaps . Paratypes, 3 ♀ ( IEBR), “Rog. 895 ”, NE Vietnam: Tuyen Quang, Na Hang, Thanh Tuong , forest, MT, 22°19’01’’N 105°24’02’’E, 162m, 15.xi.2016, KD Long; “Rog. 041 ”, N Vietnam: Ninh Binh, Cuc Phuong NP, forest, 20°20’N 105°35’E, 200m, sweep, 9.v.2002, KD Long; “Rog. 441 ”, NW Vietnam: Hoa Binh, Yen Thuy, Da Phuc, forest, MT, 20°28’12’’N 105°34’40’’E, 80m, 20–30.iv.2004, KDLong; paratypes GoogleMaps , 6 ♂ ( IEBR), “Rog. 232 ”, “Rog. 267 ”, “Rog. 234 ”, “Rog. 273 ”, N Vietnam: Ninh Binh, Cuc Phuong NP, forest, MT, 20°23’N 105°34’E, 315m, 10–20.ix.2002, KD Long; “Rog. 244 ”, NW Vietnam: Hoa Binh, Yen Thuy, orchard, MT, 20°23’N 105°34’E, 105m, 20–30.x.2002, KD Long; “Rog. 268 ”, ibid., but 20–30.iii.2002, KDLong GoogleMaps .

Morphology. Holotype, ♀, body length 8.4 mm, fore wing length 6.8 mm, antenna 10.2 mm ( Fig. 37 View FIGURES 37–47 ).

Head. Antenna with 54 flagellomeres; middle flagellomeres 3.0 × longer than wide (9: 3); 3 rd antennomere 1.2 × 4 th (12: 10); 3 rd segment of maxillary palp 3.7 × longer than maximally wide (11: 3); 5 th segment 1.3 × length of 6 th (13: 10); width of face 1.3 × length of face and clypeus combined (22: 17); width of face: height of eye = 2.3: 2.9; malar space 0.3 × as long as basal width of mandible (5: 18); basal width of mandible rugose, 1.2 × as long as hypoclypeal depression (18: 15); distance between tentorial pits 4.0 × distance between pit and eye (12: 3); in dorsal view, height of eye 2.5 × as long as temple (20: 8); in lateral view, width of eye 2.0 × as long as temple (18: 9) ( Fig. 42 View FIGURES 37–47 ); ocelli high, POL: OD: OOL = 3: 6: 4; distance between front and hind ocelli as long as OOL ( Fig. 39 View FIGURES 37–47 ); occipital carina broadly obliterated mediodorsally; face rugo-punctate medially, transversely rugulose laterally ( Fig. 38 View FIGURES 37–47 ); frons flat, with sparse convergent striae ( Fig. 39 View FIGURES 37–47 ).

Mesosoma. Length of mesosoma 1.45 × as long as high (77: 53); propleuron smooth; mesopleuron largely smooth; precoxal sulcus shallow, coriaceous; metapleuron rugo-punctate; mesoscutum largely smooth with sparse fine punctures; notauli deep and sparsely crenulate anteriorly, with a median depression posteriorly between notauli ( Fig. 40 View FIGURES 37–47 ); scutellar sulcus 0.6 × as long as scutellum (7: 12) with one carina; scutellum smooth; propodeum with median depression, crenulate medially, sparsely punctate laterally ( Figs 43, 46 View FIGURES 37–47 ).

Fore wing. Pterostigma 5.4 × as long as wide (54: 10); vein M+CU1 weakly curved on distal half; vein 1-M moderately strongly curved posteriorly; vein r arising far before middle of pterostigma; vein cu-a postfurcal, reclivious ( Fig. 44 View FIGURES 37–47 ); 2-CU1 6.8 × longer than 1-CU1; SR1: 3-SR: r = 48: 34: 11; vein 2-SR 6.7 × 2-SR+M (20: 3); 1-CU1: cu-a: 2-CU1: 3-CU1 = 5: 8: 34: 8; basal length of second submarginal cell 3.35 × as long as its apical width (47: 14).

Hind wing. Vein M+CU 1.1 × length of 1-M (34: 31); M+CU: 1-M: 1r-m = 34: 31: 19; vein 2-SC+ R thickened, subquadrate ( Fig. 45 View FIGURES 37–47 ); vein SR slightly curving basally and almost parallel to wing margin posteriorly.

Legs. Hind coxa shiny smooth; femur: tibia: basitarsus: tarsus 1–5 = 62: 84: 48: 107; length of hind femur, tibia and basitarsus 6.9, 10.5 and 12.0 × as long as their width respectively; middle tibial spur curved and setose basally; apex of hind tibia with comb of specialized setae at inner side.

Metasoma. First tergite 1.6 × as long as apical width (55: 34) ( Fig. 47 View FIGURES 37–47 ); first tergite with basal short median carina becoming sinuate rugosity posteriorly, surface of first tergite rugulose contrast to 2 nd tergite with sparse striae ( Fig. 47 View FIGURES 37–47 ); 2 nd metasomal tergite with indistinct midbasal triangular area, 0.9 × its apical width (40: 46); medial length of 2 nd tergite 1.1 × its basal width (40: 35), and 1.1 × than 3 rd (40: 35); 2 nd metasomal tergite 0.9 × wider than medially long (35: 40), sparsely longitudinally striate with approximately 8 striae lateral to midlongitudinal; 3 rd metasomal tergite 0.7 × its basal width (35: 48) ( Fig. 47 View FIGURES 37–47 ); third-fourth tergites densely striate, except extremely apex punctate; fifth-sixth tergites sparsely finely punctate; hypopygium weakly convex, sparsely setose ( Fig. 41 View FIGURES 37–47 ); subapical ventral margin of ovipositor constricted, with three ventral teeth before the ventral constriction ( Fig. 41 View FIGURES 37–47 ).

Coloration. Body yellow; stemmaticum black; frons, median and lateral lobes of mesoscutum yellowish brown; wings yellow; pterostigma yellowish brown medially, pale yellow basally and apically ( Fig. 44 View FIGURES 37–47 ); membrane of fore wing smoky apically.

Male. (Paratype) ( Fig. 48 View FIGURES 48–55 ): Body length 6.3 mm, fore wing length 5.1 mm; 3 rd segment of maxillary palp 1.85 × longer than maximally wide (13: 7); 5 th segment as long as 6 th segment (10: 10) ( Fig. 52 View FIGURES 48–55 ); width of face: height of eye = 1.7: 2.6; fore wing vein 2-SR 5.0 × 2-SR+M (15: 3) ( Fig. 53 View FIGURES 48–55 ); basal length of second submarginal cell 3.45 × as long as its apical width (38: 11) ( Fig. 53 View FIGURES 48–55 ); vein 2-SC+ R of hind wing subquadrate ( Fig. 54 View FIGURES 48–55 ).

Etymology. From “neuter” (Latin for ‘neither one nor the other’), because this new species is close to Colastomion cephonodes , sp. n., differences between these two new species are given in the key.

Biology. Unknown.

Distribution. N Vietnam (Ninh Binh); NE Vietnam (Tuyen Quang); NW Vietnam (Hoa Binh).