Telostholus tomentosus 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 : 546-548

Telostholus tomentosus Loktionov , sp. nov.

( Figs 34–44 )

Material examined. Holotype, ♀, Malaysia, Pahang, Bukit Fraser , 29.II–6.III.2000 (K. Deneš jun.) [OLL].

Diagnosis. Female. The female of this new species can be easily separated from those of other congeners by the following combination of characters: (1) eye broad ( Fig. 37 ), half of MID 1.2 times eye width; (2) POD: OOD = 1.25; (3) F1 0.73 times UID; (4) disc of pronotum with transverse band of grayish pubescence along its anterior and posterior margin, and longitudinal median band of grayish pubescence ( Fig. 39 ); (5) propodeum with short tubercle postero-laterally ( Figs 40–42 ); (6) fore wing with broad apical and narrow basal brown bands ( Fig. 43 ); (7) scape as long as F1. Male. Unknown.

Description. FEMALE. Length: body 10.0 mm; fore wing 8.7 mm. Head width 1.15 times its height; MID 0.56 times head width in frontal view, half of MID 1.2 times eye width ( Fig. 37 ). Ocelli large, slightly raised; ocellar tri- angle right-angled; POD: OOD = 1.25 ( Fig. 39 ). Head in frontal view with vertex strongly roundly convex between eye top ( Fig. 37 ). Posterior margin of vertex in dorsal view broadly concave ( Fig. 39 ). Head in lateral view with frons slightly convex ( Fig. 38 ). Frons near anterior ocellus barely concave. Temple in dorsal view weakly developed ( Fig. 39 ). Gena in profile strongly narrowing towards vertex, in upper portion very narrow, but not liner ( Fig. 38 ). Malar space very short ( Fig. 34 ). Clypeus noticeably transversally convex, its width 0.8 times LID, and 2.4 times its height; anterior margin straight, without depressed anterior rim; anterolateral corner angulated ( Fig. 34 ). Mandible slender, with small subapical tooth. Labrum well exposed, rounded, with anterior margin straight medially ( Fig. 34 ). Maxillary palps 3–6 about same length. Scape slightly concave ventrally. Flagellum filiform. Ratio of scape, pedicel and flagellomeres length (on ventral side) 50: 15: 50: 42: 35: 31: 28: 26: 23: 21: 20: 23. Scape length 0.73 times UID. F1 length 4.0 times its maximum width, 1.0 times scape length, and 0.73 times UID. Apical flagellomere blunt apically.

Mesosoma. Pronotum length in dorsal view 0.45 times its maximum width; anterior face short and inclined, differentiated from dorsum by two weakly produced transverse subtriangular processes medially; posterior border rounded, distinctly angulate medially ( Figs 39, 40 ). Dorsum of mesoscutum slightly convex. Dorsum of mesoscutellum and metanotum convex. Metapostnotum short and deeply sunken, its median portion partially hidden under overhanging metanotum ( Figs 40, 42 ). Propodeum in dorsal view parallel-sided, its length 0.7 times its width ( Fig. 40 ); dorsum in lateral view strongly convex ( Fig. 42 ); postero-lateral corner produced into short tubercle ( Figs 40–42 ); dorsum evenly merging with posterior face not forming distinct edge; posterior face inclined and distinctly concave.

Legs. Proleg without spines, except following: protibia outer face with two spines, protibia with few different-length stout spines apically, protarsomere 1 with three longitudinal rows of very short spines ventrally, protarsomeres 2 and 3 with median longitudinal row of very short spines ventrally, protarsomere 4 with few short spines ventrally, and long spines apically. Protarsomere 1 length 1.2 times protarsomere 2–4 length combined. Mesofemur with two short spine dorso-apically. Metafemur with 4–5 short spines dorso-apically. Meso- and metatibia with scattered long spines. Metatibia longer spur length 0.5 times metatarsomere 1 length. Meso- and metatarsomere 1 with spines which shorter and rare than on mesotibia; meso- and metatarsomeres 2–4 ventrally with median longitudinal row of short spines; meso- and metatarsomeres 2 and 3 except median row of spines with spines on both sides of row. Meso- and metatarsomere 5 without spines ventrally. Tarsal claws symmetrical and bifid, inner tooth broad and obliquely truncated.

Wings. Fore wing ( Fig. 43 ) with indistinct light area along apical margin, broad brown band apically, and brown band subbasally. Pterostigma length 4.1 times its height (on inner distance) and 2.1 times Rs 2. Second submarginal cell length 2.9 times its maximum height, narrowed on vein Rs by 0.52 times its own length on vein M, receiving crossvein 1m-cu at basal 0.3 and receiving crossvein 2m-cu at basal 0.88; crossvein 3rs-m slightly arched towards wing apex; crossvein cu-a barely curved, originating at separation of vein M+CuA; vein M ending far from wing margin; vein Cu 1 not touching wing margin. Hind wing ( Fig. 44 ) translucent, with slightly brownish apical portion; crossvein cu-a evenly arched and anterofurcal.

Metasoma in dorsal view conical shaped, as wide as mesosoma. Posterior margin of T1–T5 and S1–S5 slightly emarginate medially.

Sculpture. Body matt, except mandible, labrum, and anterior face of pronotum polished. Body with inconspicuous microsculpture. Frons micropunctate, with well impressed basomedian line. Metapostnotum matt, with fine transverse striae. Dorsum of propodeum densely and minutely punctate. Antenna and legs matt.

Colour and pubescence. Body black ( Figs 35, 36 ) except mandible apically red-brown, maxillary palps darkbrown, claws brown, metatibia longitudinal brush brown. Body without setae except following: upper frons with few pale thin setae, mandible and labrum with few pale setae, fore coxa and propodeum postero-laterally with scattered grayish setae, meso- and metacoxa with scattered short grayish setae, S2–S5 with few pale short setae, S6 with many pale short and long setae, T6 with scattered long and short setae. Head and mesosoma with grayish micropubescence, most intensive on propodeum posteriorly; disc of pronotum with transverse band of grayish pubescence along its anterior and posterior margin, and longitudinal median band of grayish pubescence ( Fig. 39 ). T1–T3 with weak band of grayish pubescence ( Fig. 35 ).

MALE. Unknown.

Distribution. Malaysia (Pahang).

Etymology. The specific name of this new species refers to a peculiar pattern of pubescence on pronotum dorsum. Treated as an adjective in apposition.

Remarks. The female of this new species is similar to those of Telostholus esakii , T. clypeatus sp. nov., and T. malayensis sp. nov., but can be separated from them by having the following characters: eye broad ( Fig. 37 ), half of MID 1.2 times eye width (eye narrower, 1.4 in T. esakii ); POD: OOD = 1.25 (2.2 in T. esakii ); cells M+Cu and Cub partially brown (completely brown in T. esakii ); disc of pronotum ( Fig. 39 ) with transverse band of grayish pubescence along its anterior and posterior margin and longitudinal median band of grayish pubescence (without such bands in all species); clypeus ( Fig. 34 ) without depressed and translucent anterior rim (with depressed and translucent anterior rim in T. clypeatus sp. nov. ( Fig. 12 )); dorsum of propodeum ( Fig. 42 ) in lateral view strongly convex (slightly convex in T. clypeatus sp. nov. ( Fig. 20 )); F1 length 4.0 times its maximum width, 1.0 times scape length, and 0.73 times UID (F1 length 5.0 times its maximum width, 1.22 times scape length, and 1.17 times UID in T. malayensis sp. nov.).

Figures

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.

FIGURES 12–22. Telostholus clypeatus sp. nov., ♀, holotype. 12, clypeus and labrum in frontal view. 13 and 14, habitus (13, in lateral view; 14, in dorsal view). 15, head in frontal view. 16, head and pronotum in lateral view. 17, head and pronotum in dorsal view. 18, mesosoma part. in dorsal view. 19, propodeum in dorso-lateral view. 20, propodeum in lateral view. 21, fore wing. 22, hind wing. Scale bar: 1.0 mm for 13, 14; 0.5 mm for 18, 21, 22; 0.2 mm for 12, 15–17, 19, 20.