Telostholus lao Loktionov, 2021

Loktionov, Valery M., 2021, Discovery of the spider wasp genus Telostholus Haupt, 1929 (Hymenoptera Pompilidae) in Laos, with the description of three new species, Zootaxa 4966 (2), pp. 226-236 : 228-229

Telostholus lao Loktionov , sp. nov.

( Figs 10–17 , 29–31 )

Material examined. Holotype, ♂ “ Laos, Louangnamtha, 21°09’ N, 101°19’ E, Namtha – Muang Sing, 5–31.V.1997, 900– 1200 m, Vít Kubáň leg.” [ Laos: Luang Namtha Prov.] [OLL]. Paratypes: 2 ♂ “Laos-N, 24.iv.-16.v.1999, Louang Phrabang prov. , 20°33-4’ N, 102°14’ E, Ban Song Cha (5 km W), ± 1200 m, Vít Kubáň leg.” [ Laos: Luang Prabang Prov.]; 1 ♂ “Laos-N, 1200 m, Louang Phrabang pr. Ban Song Cha env. leg. Vít Kubáň, v.1999 ” [ Laos: Luang Prabang Prov.]; 1 ♂ “ Lao, Phongsaly prov., 21°41’ N, 102°6’ E, Phongsaly env., 6.-17.v.2004, ~ 1500 m, Vít Kubáň leg.” [ Laos: Phongsaly Prov.]; 1 ♂ “Lao-N, Phongsaly pr. Phongsaly, ~ 1500 m 21°41’-2’ N, 102°06’-8’ E Kubáň leg, V-VI.2003” [ Laos: Phongsaly Prov.] [OLL].

Diagnosis. Male. The male of this new species can be distinguished from those of other congeners by the following combination of characters: (1) the fore wing with brown apical portion ( Fig. 16 ); (2) the paramere narrow, stick-shaped ( Fig. 29 ); (3) the volsella very broad, spoon-like, its ventral face (except area along inner margin) with bristles ( Fig. 29 ); (4) the hypopygium in ventral view evenly narrowing toward apex, its ventral face in apical por- tion with setae, its lateral margin in basal portion with long setae ( Fig. 31 ). Female. Unknown.

Description. MALE. Length: body 5.0– 6.5 mm; forewing 4.4–5.7 mm. Head width 1.1–1.15 times its height; MID 0.58–0.65 times head width in frontal view ( Fig. 12 ). Ocelli large, slightly raised; ocellar triangle obtuseangled; POD: OOD = 1.15–1.3 ( Fig. 14 ). Head in frontal view with vertex slightly roundly produced above dorsal eye margin ( Fig. 12 ). Posterior margin of vertex in dorsal view slightly concave ( Fig. 14 ). Head in lateral view with frons convex ( Fig. 13 ). Temple in dorsal view slightly developed ( Fig. 14 ). Gena in profile narrow ( Fig. 13 ). Malar space short ( Fig. 13 ). Clypeus barely convex, its width 1.9–2.2 times its height, and 0.75–0.85 times LID; anterior margin straight; anterolateral corner rounded. Mandible slender, with small subapical tooth. Labrum well exposed, its anterior margin broadly rounded. Maxillary palps 2–5 about same length, palp 6 slightly longer than others. Flagellum somewhat stout; scape normal shaped; F3–F10 crenulated ventrally; ratio of scape, pedicel and F1–11 length (on ventral side; in holotype) 21: 9: 20: 20: 20: 19: 19: 18: 17: 16: 15: 15: 16; scape length 0.39–0.49 times UID; F1 length 1.9–2.2 times its maximum width (in dorsal view), and 0.38–0.5 times UID; apical flagellomere pointed apically.

Mesosoma. Pronotum length in dorsal view 0.45–0.55 times its maximum width; anterior face not differenti- ated from dorsum; posterior margin rounded and somewhat subangulate medially ( Fig. 14 ). Dorsum of mesoscutum hardly convex. Dorsum of mesoscutellum and metanotum noticeably convex. Metapostnotum depressed, barely emarginated postero-medially, its length 0.1–0.15 times metanotum length medially, sometimes its median portion almost hidden under overhanging metanotum. Propodeum length in dorsal view 0.7–0.75 times its maximum width; dorsum in lateral view weakly convex; posterior face somewhat differentiated from dorsum ( Fig. 15 ).

Legs. Profemur without spines. Protibia: short spines on inner lateral face, 1–2 long spines ventrally, and few different-length spines apically. Protarsomere 1 with three longitudinal rows of short spines ventrally. Protarsomeres 2 and 3 with few very short spines ventrally. Protarsomeres 4 and 5 without spines ventrally. Protarsomere 1 length 0.93–1.0 times length of protarsomere 2–4 combined. Protarsomere 5 in dorsal view symmetrical, its length 2.3–2.4 times its maximum width. Meso- and metafemur with few short spines dorso-apically. Meso- and metatibia with scattered long and shorter spines. Metatibia longer spur length 0.8–0.87 times metatarsomere 1 length. Meso- and metatarsomere 1 with scattered spines which half length of longest mesotibial spine. Meso- and metatarsomeres 2–4 with short spines ventrally. Meso- and metatarsomere 5 without spines ventrally. Tarsal claws of all legs symmetrical and bifid, inner tooth long, broad, and obliquely truncated apically.

Wings. Fore wing ( Fig. 16 ) translucent, with brownish apical portion and weak light area just beyond second submarginal cell. Pterostigma brown, its length 4.1–4.2 times its height (on inner distance), and 1.87–2.27 times Rs 2. Second submarginal cell length 2.4–2.5 times its maximum height, narrowed on vein Rs by 0.5–0.58 times its own length on vein M, receiving crossvein 1m-cu at basal 0.19–0.3 and receiving crossvein 2m-cu at basal 0.76–0.87. Crossvein 3rs-m arched. Crossvein cu-a hardly arched or straight, originating at or just beyond separation of vein M+CuA. Vein M not touching wing margin. Hind wing ( Fig. 17 ) translucent, with brownish apical portion; cross- vein cu-a evenly arched and hardly anterofurcal.

Metasoma in dorsal view lanceolate, slightly narrower than mesosoma. Genitalia ( Figs 29, 30 ); paramere nar- row and long, slightly curved and pointed apically, its outer margin with bristles, its basal half ventrally with or without a few long bristles; apical part of volsella very broad, spoon-like, its ventral face (except area along inner margin) with long dense erect curved bristles ending at top with small ball; parapenial lobe in upper half somewhat crescent-shaped, with narrowing apex. Hypopygium ( Fig. 31 ) in ventral view evenly narrowing toward apex, round- ed apically; apical half flat in lateral view; ventral face in apical portion only with thin erect setae; lateral margin in basal portion with long setae. S6 deeply roundly emarginate medially; emargination somewhat broadened basally.

Sculpture. Head, meso- and metasoma matte, except frons somewhat polished, mandible apically polished. Body with inconspicuous microsculpture. Frons finely and densely punctate, median line slightly depressed. Metapostnotum with transverse striae laterally. Dorsum of propodeum gently densely punctate. Antenna matte. Legs matt, except metafemur inner surface polished.

Colour and pubescence. Body black ( Figs 10, 11 ). Antenna black, sometimes F1 and F2 brownish ventrally. Apical half of mandible dark brown. Claws dark brown. Body without setae except following: gena, propleura, and propodeum postero-laterally with scattered gray erect setae or without them; mandible with few thick brown setae; S2–S5 with few pale setae. Body with sparse gray pubescence, most intensive on propodeum postero-laterally.

FEMALE. Unknown.

Distribution. Laos (Luang Namtha Prov., Luang Prabang Prov., Phongsaly Prov.).

Etymology. The new species is named after Laos, the country where the type material was collected. Treat as a noun in apposition.

Figures

FIGURES 10–17. Telostholus lao sp. nov., ♂ (paratype). 10 and 11, habitus (10, in lateral view; 11, in dorsal view). 12, head in frontal view. 13, head and pronotum part. in lateral view. 14, antenna part., head, pronotum, and mesoscutum part in dorsal view. 15, mesosoma part. and metasoma part. in dorso-lateral view. 16, fore wing. 17, hind wing. Scale bar: 1.0 mm for 10, 11; 0.5 mm for 15–17; 0.2 mm for 12–14.

FIGURES 26–34. Male genitalia and pregenital segments. 26–28, Telostholus kubani sp. nov. (paratype); 29–31, Telostholus lao sp. nov. (paratype); 32–34, Telostholus leleji sp. nov. (holotype). 26, 27, 29, 30, 32, 33, genitalia (26, 29, 32, in ventral view; 27, 30, 33, in dorsal view). 28, 31, 34, S7 and S8 (hypopygium), in ventral view. Scale bar: 0.2 mm for 32–34; 0.1 mm for 26–31.