Psyttalia tricolorata 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 : 20-22

publication ID	https://doi.org/ 10.11646/zootaxa.5477.1.1
publication LSID	lsid:zoobank.org:pub:9F6054CD-B712-4150-A3C3-7C6A4788C002
persistent identifier	https://treatment.plazi.org/id/57750A34-9519-FFC2-568E-0ADBC6DDA5B2
treatment provided by	Plazi
scientific name	Psyttalia tricolorata Long
status	sp. nov.

Treatment

Psyttalia tricolorata Long , sp. nov.

Figures 13 View FIGURE 13 , 14 View FIGURE 14

Type material. Holotype, ♀, “Opii. 328 ” ( IEBR), CH Vietnam: Lam Dong , Bi Doup-Nui Ba NP, forest, MT, 8.x.2017, PT Nhi.

Paratypes, 1 ♀, “Opii. 314” ( IEBR), the same data as holotype ; 1 ♂, “Opii. 319” ( IEBR), NC Vietnam: Ha Tinh, Huong Son , 18°22’N 106°13’ E 200m, April 13–19 1998, Malaise (trap), AMNH, K. Long GoogleMaps .

Comparative diagnosis. Easily recognizable species, because of the contrast tri-coloured body ( Fig. 15 View FIGURE 15 ); malar space wide and malar suture well defined ( Figs 14B, C View FIGURE 14 ); malar space relatively wide compared with Vietnamese Psyttalia species, 0.8 × basal width of mandible; and ventral margin of clypeus nearly sinuate ( Fig. 14B View FIGURE 14 ). Regarding the contrasting colouration of P. tricolorata , it is similar to P. spectabilis van Achterberg , from Japan, but distinctly differs from the latter by having: 1) clypeus narrow rectangular in shape, width of clypeus 2.0 × its maximum height ( Fig. 14B View FIGURE 14 ) [vs wide triangular in shape, 4.0 × its maximum height, see Fig. 95 in Wu et al. (2016)]; 2) malar space wide and malar suture well defined ( Fig. 14B View FIGURE 14 ) [vs malar space narrow and malar suture hardly defined in P. spectabilis , see Fig. 95 in Wu et al. (2016)]; 3) first metasomal tergite with dorsal carinae united in its middle ( Fig. 16E View FIGURE 16 ) [vs not united dorsal carinae in the middle of the tergite in P. spectabilis , see Fig. 93 in Wu et al. (2016)]; and 4) face rugo-punctate with distinct raised carina medially ( Fig. 14B View FIGURE 14 ) (vs face moderately punctate in P. spectabilis ).

Description. Holotype, ♀, length of body 4.0 mm, fore wing 4.4 mm, ovipositor 2.1 mm ( Fig. 13 View FIGURE 13 ).

Head. Antenna with 49 flagellomeres, flagellomeres bristly; first flagellomere 1.1 × as long as second; length of first and second flagellomeres 2.0 and 1.75 × their width, respectively; length of maxillary palp 0.9 × height of head; in dorsal view, head 2.0 × as wide as long medially; length of eye in dorsal view 3.8 × temple ( Fig. 14A View FIGURE 14 ); frons, temple and vertex smooth ( Fig. 14A View FIGURE 14 ); OOL: OD: POL = 7: 4: 4; in lateral view, medially eye 1.7 × as long as wide and 2.0 × as wide as temple ( Fig. 14C View FIGURE 14 ); ventral margin of clypeus sinuate ( Fig. 14B View FIGURE 14 ); width of clypeus 2.0 × its maximum height, and 0.75 × height and 0.5 width of face, respectively; hypoclypeal depression wide and deep ( Fig. 14B View FIGURE 14 ); distance between tentorial pits 2.6 × distance from pit to eye margin; malar well defined; clypeus rugulose; face rugo-punctate with distinct raised carina medially ( Fig. 14B View FIGURE 14 ); mandible twisted, with both teeth wide, enlarged basally and with narrow ventral carina ( Fig. 14B View FIGURE 14 ); occipital carina remains far removed from hypostomal carina and dorsally largely absent; frons nearly flat, smooth ( Fig. 14A View FIGURE 14 ); vertex and temple smooth.

Mesosoma. Laterally, length of mesosoma 1.4 × its height; pronope absent, only with groove; pronotal side largely smooth ( Fig. 14F View FIGURE 14 ); propleuron flattened; epicnemial area smooth dorsally; precoxal sulcus rather wide and deep medially, moderately crenulate anteriorly ( Fig. 14F View FIGURE 14 ); remainder of mesopleuron smooth and shiny; metapleuron largely smooth, except for ventral crenulate groove and foveolate-punctate area posteriorly ( Fig. 14F View FIGURE 14 ); pleural sulcus smooth ventrally; mesosternal sulcus narrow and deep, finely crenulate; postpectal carina absent; mesoscutum very shiny and nearly entirely glabrous ( Fig. 14D View FIGURE 14 ); notauli with pair of partly crenulate impressions only anteriorly and groove-like depression on disc posteriorly ( Fig. 14D View FIGURE 14 ); mesoscutum near flat posteriorly; scutellar sulcus narrow and deep, crenulate, slightly concave medio-posteriorly, 0.3 × as long as scutellum; scutellum slightly convex and smooth, sparsely setose apically and laterally; metanotum with short longitudinal; propodeum with rather wide and deep lateral grooves above spiracle, sparsely crenulate; surface of propodeum coriaceous, except for convergent rugo-striate area near median carina posteriorly ( Fig. 14G View FIGURE 14 ).

Wings. Vein 1-SR of fore wing as long as wide and not linear with 1-M; pterostigma broad triangular in shape; length of pterostigma 3.2 × as long as its width medially; vein r angled with anterior-ventral margin of pterostigma, and not linear with 3-SR ( Fig. 14I View FIGURE 14 ); vein r 0.4 × as long as 2-SR; 1-R1 ending at wing apex and 1.4 × as long as pterostigma; vein M+CU1 basally unsclerotized; and r-m unpigmented; 1-SR+M sclerotized; r: 2-SR: 3-SR: r-m: SR1 = 5: 12: 18: 7: 30; vein 2-SR+M slender, 2.7 × its maximum width; 1-CU1: cu-a = 4: 5; r: 3-SR: SR1 = 5: 18: 30; 2-SR: 3-SR: r-m = 12: 18: 7; SR1 distinctly curved medially; 1-M slightly curved basally; m-cu far antefurcal, not linear with 2-SR+M and nearly parallel with 1-M ( Fig. 14I View FIGURE 14 ); cu-a postfurcal, oblique; vein M+CU1 curved apically; cu-a: 1-CU1: 2-CU1= 4: 4: 22; subdiscal cell hardly narrowed anteriorly; hind wing with M+CU: 1-M: 1r-m = 19: 27: 14; cu-a straight; m-cu and SR absent ( Fig. 14K View FIGURE 14 ).

Legs. Length of femur, tibia and basitarsus of hind leg 3.3, 9.7 and 6.0 × as long as wide, respectively; hind basitarsus 0.4 × hind tibia, and 0.6 × second–fifth tarsus combined; inner and outer spurs 0.4 and 0.3 × as long as basitarsus, respectively; hind femur with rather dense and long setae; hind tibia and tarsus with dense and long setae.

Metasoma. Length of first tergite 1.3 × its apical width, convex medio-posteriorly, its surface largely rugo-striate ( Fig. 14E View FIGURE 14 ), dorsal carinae strong in basal half of tergite and nearly united in the middle of the tergite ( Fig. 14E View FIGURE 14 ); second suture indistinctly indicated; second tergite enlarged ( Fig. 14E View FIGURE 14 ); combined length of second and third metasomal tergites 0.6 × the remaining tergites posteriorly; first tergite depressed and smooth in 0.3 basal tergite and striate-rugulose in 0.7 apical tergite; second and following tergites smooth, shiny with long and sparse setae apically and laterally ( Fig. 14H View FIGURE 14 ).

Colour. Reddish yellow and black; antenna darkish brown; scapus yellow but brown laterally; head reddish yellow but stemmaticum black; palpi whitish yellow; propleuron and mesopleuron reddish yellow; metapleuron reddish yellow but black extreme posteriorly; mesonotum and propodeum reddish yellow, except extreme posteriorly black; fore and middle legs yellow, except all coxa, trochanter and trochantellus ivory or white; hind coxa, trochanter, trochantellus and femur ivory or white; hind tibia and tarsus black but hind telotarsus yellow; tegula yellow; pterostigma dark brown; wing membrane subhyaline, veins dark brown; first–fifth tergites black; sixth tergite, sternites and hypopygium ivory or white; ovipositor sheath blackish brown; ovipositor yellow.

Variation. Paratype ♀, “Opii. 314 ”, antenna with 54 flagellomeres; length of body 4.4 mm, fore wing 4.9 mm, length of visible ovipositor 2.3 mm; paratype ♂. “Opii. 319 ”, antenna with 40 flagellomeres remaining; length of body 4.5 mm, fore wing 4.6 mm; and the same colour of body.

Distribution. NC Vietnam: Ha Tinh (Huong Son), SH Vietnam: Lam Dong (Bi Doup-Nui Ba NP).

Biology. Unknown.

Etymology. From “tri” (Latin for “three”), and “coloris” (Latin for “hue, tint”), because of the tricoloured body.