Psyttalia Walker, 1860

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 : 3

publication ID	https://doi.org/ 10.11646/zootaxa.5477.1.1
publication LSID	lsid:zoobank.org:pub:9F6054CD-B712-4150-A3C3-7C6A4788C002
DOI	https://doi.org/10.5281/zenodo.12722748
persistent identifier	https://treatment.plazi.org/id/57750A34-9508-FFD5-568E-0ADBC394A6D0
treatment provided by	Plazi
scientific name	Psyttalia Walker
status

Treatment

Key to Vietnamese species of Psyttalia Walker View in CoL View at ENA

1 Vein m-cu of fore wing angled with vein 2-CU1 and straight ( Figs 4H View FIGURE 4 , 8H View FIGURE 8 , 14I View FIGURE 14 ); first subdiscal cell of fore wing parallel-sided; vein r of fore wing nearly linear with vein 3-SR ( Figs 4H View FIGURE 4 , 8H View FIGURE 8 , 14I View FIGURE 14 ).............................................. 2

- Vein m-cu of fore wing gradually merging into vein 2-CU1 and more or less curved ( Figs 2I View FIGURE 2 , 6I View FIGURE 6 , 10H View FIGURE 10 , 12H View FIGURE 12 , 16E View FIGURE 16 ); first subdiscal cell of fore wing distinctly widened posteriorly; vein r of fore wing weakly angled with vein 3-SR ( Figs 2I View FIGURE 2 , 6I View FIGURE 6 , 10H View FIGURE 10 , 12H View FIGURE 12 , 16E View FIGURE 16 )............................................................................................... 4

2 Body tricoloured (head and mesosoma brownish yellow, metasoma black but apex white); antenna with about 49 segments; clypeus triangular ( Fig. 14B View FIGURE 14 ); pale yellowish hind femur strongly contrasting with black hind tibia ( Fig. 13 View FIGURE 13 ); pterostigma blackish brown ( Fig. 14I View FIGURE 14 )............................................................... P. tricolorata sp. nov.

- Body uni- or bicoloured, yellowish and at most with dark brown pattern; antenna with 33–36 antennomeres; clypeus transverse ( Figs 4B View FIGURE 4 , 8A View FIGURE 8 ); yellowish hind femur weakly contrasting with partly brown hind tibia ( Figs 3 View FIGURE 3 , 7 View FIGURE 7 ) or similarly coloured; pterostigma yellowish or brown ( Figs 4H View FIGURE 4 , 8H View FIGURE 8 ).............................................................. 3

3 Basal half of pterostigma and apical half of hind tibia brown; clypeus convex ventrally, resulting in a smaller hypoclypeal depression ( Fig. 8B View FIGURE 8 ); scutellar sulcus parallel-sided ( Fig. 8D View FIGURE 8 ); metasoma with dark brown pattern ( Fig. 8E View FIGURE 8 )................................................................................................ P. nigristriata sp. nov.

- Basal half of pterostigma and apical half of hind tibia yellow; clypeus straight ventrally, resulting in large hypoclypeal depresion ( Fig. 4B View FIGURE 4 ); scutellar sulcus distinctly concave medio-posteriorly ( Fig. 4D View FIGURE 4 ); metasoma without dark brown pattern ( Fig. 4F View FIGURE 4 ).................................................................................. P. hoabinhensis sp. nov.

4 Strongly widened vein 1-CU1 of fore wing curved and 0.6 × as long as vein 2-CU1 ( Fig. 16E View FIGURE 16 ); vein 1-SR of fore wing about as long as wide ( Fig. 16E View FIGURE 16 ); vein r 0.3 × as long as vein 2-SR........................ P. latinervis Wu & van Achterberg

- More or less widened vein 1-CU1 of fore wing straight and 0.1 × as long as vein 2-CU1 ( Figs 2I View FIGURE 2 , 6I View FIGURE 6 , 10H View FIGURE 10 ) or vein cu-a subinterstitial or antefurcal ( Figs 2I View FIGURE 2 , 12H View FIGURE 12 ); vein 1-SR of fore wing longer than wide ( Fig. 2I View FIGURE 2 ); vein r 0.4–1.0 × as long as vein 2-SR ( Figs 2I View FIGURE 2 , 6I View FIGURE 6 , 10H View FIGURE 10 , 12H View FIGURE 12 )............................................................................ 5

5 Vein m-cu of fore wing straight or nearly so ( Fig. 15E View FIGURE 15 ); vein 2-SR+M of fore wing narrow ( Fig. 15E View FIGURE 15 ); vein 1-SR of fore wing linear with vein 1-M..................................................................... P. incisi (Silvestri) View in CoL

- Vein m-cu of fore wing more or less curved ( Figs 2I View FIGURE 2 , 6I View FIGURE 6 , 10H View FIGURE 10 ); vein 2-SR+M of fore wing widened ( Figs 2I View FIGURE 2 , 6I View FIGURE 6 , 10H View FIGURE 10 ); vein 1-SR of fore wing linear with vein 1-M more or less angled with vein 1-M............................................ 6

6 Vein cu-a of fore wing distinctly antefurcal ( Fig. 2I View FIGURE 2 ); apical third of pterostigma paler than dark brown middle third; vein 1-SR of fore wing distinctly angled with vein 1-M; vein 2-SR of fore wing slightly widened medially ( Fig. 2I View FIGURE 2 ); vein r of fore wing emitted distinctly before middle of pterostigma, and 0.4 × as long as vein 2-SR.................... P. antenervis sp. nov.

- Vein cu-a of fore wing postfurcal ( Figs 6I View FIGURE 6 , 12H View FIGURE 12 ) or subinterstitial ( Fig. 10H View FIGURE 10 ); apical third of pterostigma as dark as brown middle third or nearly so; vein 1-SR of fore wing less angled with vein 1-M; vein 2-SR of fore wing narrow medially ( Figs 6I View FIGURE 6 , 10H View FIGURE 10 , 12H View FIGURE 12 ); vein r of fore wing emitted more or less after middle of pterostigma, and 0.6-1.0 × as long as vein 2-SR....... 7

7 Pterostigma broad triangular in shape, and 3.1 × as long as wide medially ( Fig. 10H View FIGURE 10 ); posterior half vein m-cu of fore wing about at level of vein 2-CU1 ( Fig. 10H View FIGURE 10 ); vein 2-SR+M of fore wing strongly widened [vein r of fore wing 0.9 × as long as vein 2-SR]........................................................................... P. quadrinervis sp. nov.

- Pterostigma narrow triangular in shape, and 3.6–4.4 × ( Figs 16I View FIGURE 16 , 12H View FIGURE 12 ); posterior half of vein m-cu of fore wing distinctly above level of vein 2-CU1 ( Figs 6I View FIGURE 6 , 12H View FIGURE 12 ); vein 2-SR+M of fore wing less widened ( Figs 16I View FIGURE 16 , 12H View FIGURE 12 ) [vein r of fore wing 0.6–0.9 × as long as vein 2-SR].................................................................................... 8

8 Vein r of fore wing about 0.6 × as long as vein 2-SR ( Fig. 12H View FIGURE 12 ); vein 2-CU1 distinctly curved that first subdiscal cell more widened medially ( Fig. 12H View FIGURE 12 ); length of first tergite 1.25 × its apical width, dorsal carinae present in basal 0.5 of the tergite ( Fig. 12I View FIGURE 12 ).................................................................................... P. sonla sp. nov.

- Vein r of fore wing 0.8–1.0 × as long as vein 2-SR ( Fig. 6I View FIGURE 6 ); vein 2-CU1 weakly curved that first subdiscal cell less widened medially ( Fig. 6I View FIGURE 6 ); length of first tergite 1.1 × its apical width, dorsal carinae present in basal 0.7 of the tergite ( Figs 6G, H View FIGURE 6 ).................................................................................... P. mangiferae sp. nov.