Psyttalia sonla Long, 2024

Oanh, Nguyen Thi, Long, Khuat Dang, Xuan, Trinh Thi, Tinh, Duong Van & Nghiep, Hoang Thi, 2024, The genus Psyttalia Walker (Hymenoptera, Braconidae) in Vietnam: descriptions of seven new species and their host information, Zootaxa 5477 (1), pp. 1-26 : 17-19

Psyttalia sonla Long , sp. nov.

Figures 11 , 12

Type material. Holotype, ♀, “Opii. 344 ” ( IEBR), NW Vietnam: Son La, Chieng Sinh , coffee orchard, 21°16’06’’N 103°55’36’’E 663m, MT, 20.x–1.xi.2017, KDLong, NVDzuong.

Comparative diagnosis. Psyttalia sonla sp. nov. is similar to P. antenervis sp. nov. sharing the first subdiscal cell of fore wing strongly narrowed basally, and the punctate narrow groove-like precoxal sulcus. See the comparative differences under P. antenervis sp. nov.

Description. Holotype, ♀, length of body 2.9 mm, fore wing 3.1 mm, ovipositor 1.6 mm ( Fig. 11 ).

Head. Antenna with 44 flagellomeres, flagellomeres bristly; first flagellomere 1.3 × as long as second; length of first and second flagellomeres 3.0 and 2.3 × their width, respectively; length of maxillary palp 0.9 × height of head; in dorsal view, head 2.1 × as wide as long medially; length of eye in dorsal view 4.2 × temple ( Fig. 12A ); OOL: OD: POL = 6: 4: 3; in lateral view, medially eye 1.5 × as long as wide and 3.4 × as wide as temple ( Fig. 12C ); ventral margin of clypeus nearly straight medially ( Fig. 12B ); width of clypeus 2.4 × its maximum height, 0.8 × height and 0.5 × width of face, respectively; hypoclypeal depression wide and shallow ( Fig. 12B ); distance between tentorial pits 2.7 × distance from pit to eye margin; malar space narrow, 0.5 × basal width of mandible; mandible not twisted, apically moderately narrowed and with both teeth wide, normal basally and with narrow ventrally ( Fig. 12B ); clypeus rugo-punctate; face rugo-punctate with distinct raised carina medially ( Fig. 12B ); occipital carina remains far removed from hypostomal carina and dorsally largely absent; frons nearly flat, slightly depressed anteriorly; vertex and temple mostly smooth ( Fig. 12A ).

Mesosoma. Laterally, length of mesosoma 1.3 × its height; pronope absent, only with groove; pronotal side largely smooth, but anterior groove present ( Fig. 12F ); propleuron flattened; epicnemial area smooth dorsally; precoxal sulcus shallow, and moderately crenulate ( Fig. 12F ); remainder of mesopleuron smooth and shiny; pleural sulcus smooth ventrally; mesosternal sulcus shallow, narrow and finely crenulate; postpectal carina absent; mesoscutum very shiny and nearly entirely glabrous ( Fig. 12D ); notauli only anteriorly as pair of partly short smooth impressions and largely absent on disc, mesoscutum flat posteriorly; scutellar sulcus parallel-sided medially, largely punctate, 0.3 × as long as scutellum ( Fig. 12D ); scutellum slightly convex and smooth, only apically sparsely setose; metanotum with short carina anteromedially and short carina posteriorly; propodeum with median carina fused into fading reversed Y-shaped carina posteriorly; surface of propodeum smooth, except lateral sinuate carinae above spiracle ( Fig. 12G ).

Wings. Fore wing: 1-SR shorter than wide and not linear with 1-M; pterostigma narrow triangular in shape; length of pterostigma 4.4 × as long as its width medially; vein r angled with anterior-ventral margin of pterostigma, and not linear with 3-SR ( Fig. 12H ); 1-R1 ending at wing apex and 1.7 × as long as pterostigma; r-m unsclerotized; subdiscal cell strongly narrowed anteriorly ( Fig. 12H ); vein r = 0.6 × 2-SR; r: 3-SR: SR1 = 8: 24: 46; 2-SR: 3-SR: r-m = 13: 24: 7; vein 1-M straight; 1-SR+M thin, weakly sclerotized; SR1 evenly curved; vein r-m unsclerotized; veins M+CU1 and 2-SR basally weakly sclerotized; m-cu curved, far antefurcal ( Fig. 12H ); 2-SR+M short and widened, vein 2-SR+M 2.0 × its maximum width; cu-a short, reclivous, far postfurcal; vein 1-CU1 thick; cu-a: 1- CU1: 2-CU1 = 4: 3: 22; vein 2-CU1 curved subapically ( Fig. 12H ); only apex of M+CU1 sclerotized. Hind wing with M+CU: 1-M: 1r-m = 17: 21: 10; cu-a short, weakly pigmented; m-cu and SR absent ( Fig. 12K ).

Legs. Length of femur, tibia and basitarsus of hind leg 3.7, 8.9 and 5.0 × as long as wide, respectively; hind basitarsus 0.3 × hind tibia, and 0.5 × second–fifth tarsus combined (=15: 48: 31), respectively; inner and outer spurs 0.5 and 0.4 × basitarsus, respectively; hind tibia and tarsus with long setae.

Metasoma. Length of first tergite 1.25 × its apical width, convex medio-posteriorly, its surface largely smooth, except for coriaceous medio-apically ( Fig. 12I ), dorsal carinae present in basal half of tergite and with depressed area below; second suture not indicated; combined length of second and third metasomal tergites 0.45 × the remaining tergites posteriorly; first tergite superficially sculptured medially; second and following tergites smooth, shiny and sparsely setose.

Colour. Yellow; antenna brownish yellow; head yellow but stemmaticum brown; palpi pale yellow; mesosoma yellow; all legs pale yellow; tegula yellow; pterostigma yellow basally, yellowish brown apically; wing membrane subhyaline, veins brown; metasoma yellow, except second–third tergites brownish yellow; ovipositor sheath brown; ovipositor yellow.

Male. Unknown

Distribution. NW Vietnam: Son La (Chieng Sinh).

Biology. Unknown.

Etymology. Named after the holotype locality Son La province, Northwest Vietnam.

Figures

FIGURE 11. Habitus of Psyttalia sonla Long, sp. nov., holotype, female, lateral.

FIGURE 12. Psyttalia sonla Long, sp. nov. A Head, dorsal B Head, frontal C Head, lateral D Mesonotum E Metasomal tergites 2–6 F Mesopleuron G Propodeum H Fore wing I First metasomal tergite K Hind wing.