Telostholus bifasciatus Loktionov, 2020

Loktionov, Valery M., 2020, The spider wasp genus Telostholus Haupt, 1929 (Hymenoptera, Pompilidae) in Malaysia, with the description of four new species, Zootaxa 4768 (4), pp. 538-550 : 539-541

Telostholus bifasciatus Loktionov , sp. nov.

( Figs 1–11 )

Material examined. Holotype, ♂, Malaysia, Pahang, Tanah Rata, Mt. Jasar env., 4°28’36’’ N, 101°21’49’’E, 1600 m, 16–20.IV.2015 (E. Jendek, O. Šauša) [OLL].

Diagnosis. Male. The male of this new species can be distinguished from those of other congeners by the following combination of characters: (1) head in frontal view with vertex slightly roundly produced above dorsal eye margin ( Fig. 3 ); (2) ocellar triangle right-angled; (3) fore wing with apical and subbasal brown bands ( Fig. 7 ); (4) parapenial lobe of genitalia crescent-shaped ( Fig. 9 ); (5) hypopygium apical half flat in lateral view and semi-oval in ventral view ( Fig. 10 ). Female. Unknown.

Description. MALE. Length: body 8.1 mm; fore wing 7.0 mm. Head 1.2 times as wide as height; MID 0.6 times head width in frontal view ( Fig. 3 ). Ocelli large, slightly raised; ocellar triangle right-angled; POD: OOD = 1.42 ( Fig. 5 ). Head in frontal view with vertex slightly roundly produced above dorsal eye margin ( Fig. 3 ). Posterior margin of vertex in dorsal view slightly concave ( Fig. 5 ). Head in lateral view with frons convex ( Fig. 4 ). Temple in dorsal view slightly developed ( Fig. 5 ). Gena in profile narrow ( Fig. 4 ). Malar space short ( Fig. 4 ). Clypeus barely convex, its width 2.3 times its height, and 0.77 times LID; anterior margin straight; anterolateral corner distinct and rounded ( Fig. 3 ). Mandible slender, with small subapical tooth. Labrum broadly rounded, its anterior margin straight medially. Maxillary palps 2–5 about same length, palp 6 slightly longer than others. Flagellum somewhat stout; scape normal shaped; F3–F11 serrate ventrally; ratio of scape, pedicel and flagellomeres length (on ventral side) 31: 8: 27: 25: 24: 24: 22: 22: 20: 19: 16: 19: 22; scape length 0.48 times UID; F1 length 2.1 times its maximum width, and 0.42 times UID; apical flagellomere pointed apically.

Mesosoma. Pronotum length in dorsal view 0.43 times its maximum width; anterior face not differentiated from dorsum; posterior margin rounded and somewhat subangulate medially ( Fig. 5 ). Dorsum of mesoscutum slightly convex. Dorsum of mesoscutellum and metanotum noticeably convex. Metapostnotum shallow, barely emarginated postero-medially, its length 0.3 times metanotum length medially. Propodeum length in dorsal view 0.73 times its maximum width; dorsum in lateral view slightly convex; posterior face not well differentiated from dorsum, but roundly merging with it.

Legs. Proleg without spines, except following: protibia ventro-apically with one spine, protibia with few different-length spines apically, protarsomere 1 with three longitudinal rows of short spines ventrally, protarsomeres 2–4 with few short spines ventrally. Protarsomere 1 length 1.0 times length of protarsomere 2–4 combined. Protarsomere 5 in dorsal view symmetrical, its length 2.3 times its maximum width. Mesofemur with 4–5 short spines dorso-apically. Metafemur with 6–7 spines dorso-apically. Meso- and metatibia with scattered long spines. Metatibia longer spur length 0.76 times metatarsomere 1 length. Meso- and metatarsomere 1 with scattered spines which shorter than on mesotibia. Meso- and metatarsomeres 2–4 with few short spines ventrally. All tarsomeres 5 without spines ventrally. Tarsal claws symmetrical and bifid, inner tooth long, broad, and obliquely truncated apically.

Wings. Fore wing ( Fig. 7 ) translucent, with brownish apical and subbasal bands. Pterostigma brown, its length 5.4 times its height (on inner distance), and 1.56 times Rs 2. Second submarginal cell length 2.7 times its maximum height, narrowed on vein Rs by 0.53 times its own length on vein M, receiving crossvein 1m-cu at basal 0.31 and receiving crossvein 2m-cu at basal 0.84. Crossvein 3rs-m arched. Crossvein cu-a scarcely arched, originating just at separation of vein M+CuA. Vein M ending far from wing margin. Hind wing ( Fig. 8 ) translucent, with brownish apical portion; crossvein cu-a evenly arched and barely anterofurcal.

Metasoma in dorsal view lanceolate, narrower than mesosoma. Posterior margin of S6 deeply emarginate, and indistinctly arcuately produced medially ( Fig. 11 ). Genitalia ( Fig. 9 ); paramere paddle-shaped, broad and long, its length 1.5 times parapenial lobe length; apical part of volsella broad, its ventral face closer to outer margin with dense erect curved bristles ending at top with small ball; parapenial lobe crescent-shaped, broadened at middle of upper half. Hypopygium apical half flat in lateral view and semi-oval in ventral view ( Fig. 10 ); ventral face with scattered thin erect setae.

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

Colour and pubescence. Body black ( Figs 1, 2 ) except apical half of mandible brown, maxillary palps darkbrown, F1 inconspicuously dark-reddish, claws brown. Body without setae except following: vertex with 12 pale and different-length setae, mandible with few thick brown setae, S2–S5 with few pale setae. Body with sparse gray pubescence, most intensive on propodeum postero-laterally. Frons with very sparse pubescence along orbits and without pubescence at medial part ( Fig. 3 ).

FEMALE. Unknown.

Distribution. Malaysia (Pahang).

Etymology. The specific name refers to the fore wing colouration, i.e. the presence of two distinct fasciae. Treated as an adjective in apposition.

Remarks. Among the 16 Telostholus species known so far (including four new ones described here), males were described for only four species: T. celebes , T. nontuberatus , T. orientalis , and T. yasumatsui . The male of this new species can be separated from them by having the following characters: fore wing ( Fig. 7 ) with distinct apical and subbasal brown bands (without subbasal band in all other species); head in frontal view ( Fig. 3 ) with vertex slightly rounded produced above dorsal eye margin (strongly produced in T. nontuberatus ); ocellar triangle rightangled (obtuse-angled in T. orientalis ); posterior margin of S6 ( Fig. 11 ) indistinctly arcuately produced medially (with distinct triangular process medially in T. celebes ).

The only male from Tanah Rata is considered here as a separate species, T. bifasciatus sp. nov., despite the fact that the three other new species were described from females only from the same province Pahang and even the same place, Tahan Rata. There is no direct evidence to make a sex association, though. On one hand, this male may be the opposite sex of T. tomentosus sp. nov. based on similar fore wing colouration, i.e. light area along apical wing margin is not developed ( Figs 7 , 43 ). On the other hand, the male was collected in Tanah Rata from where the female of T. malayensis sp. nov. was found.

Figures

FIGURES 1–11. Telostholus bifasciatus sp. nov., ♂, holotype. 1 and 2, habitus (1, in lateral view; 2, in dorsal view). 3, head in frontal view. 4, head in lateral view. 5, head and pronotum in dorsal view. 6, mesosoma part. in dorsal view. 7, fore wing. 8, hind wing. 9, genitalia in ventral view. 10, hypopygium in ventral view. 11, S6 in ventral view. Scale bar: 1.0 mm for 1, 2; 0.5 mm for 6–8; 0.2 mm for 3–5, 9–11.

FIGURES 34–44. Telostholus tomentosus sp. nov., ♀, holotype. 34, clypeus and labrum in frontal view. 35 and 36, habitus (35, in lateral view; 36, in dorsal view). 37, head in frontal view. 38, head in lateral view. 39, head, pronotum, and mesoscutum in dorsal view. 40, mesosoma part. in dorsal view. 41, propodeum in dorso-lateral view. 42, propodeum in lateral view. 43, fore wing. 44, hind wing. Scale bar: 1.0 mm for 35, 36, 43, 44; 0.5 mm for 39, 40; 0.2 mm for 34, 37, 38, 41, 42.