Telostholus clypeatus 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 : 541-543

Telostholus clypeatus Loktionov , sp. nov.

( Figs 12–22 )

Material examined. Holotype, ♀, Malaysia, Pahang, 30 km NE Raub, Lata Lembik , 300 m, 3°56’ N 101°38’ E, IV–V.2002 (E. Jendek, O. Šauša) [OLL].

Diagnosis. Female. The female of this new species can be separated from those of other congeners by the following combination of characters: (1) eye broad ( Fig. 15 ), half of MID 1.0 times eye width; (2) POD: OOD = 2.2; (3) clypeus with slightly depressed and translucent anterior rim ( Fig. 12 ); (4) propodeum with tubercle posterolaterally ( Figs 18–20 ); (5) fore wing ( Fig. 21 ) with distinct light translucent area along apical margin, broad brown subapical band, and entirely brown cells 1A, M+Cu, and Cub; (6) F1 as long as scape. Male. Unknown.

Description. FEMALE. Length: body 9.7 mm; fore wing 7.2 mm. Head width 1.1 times its height; MID 0.51 times head width in frontal view, half of MID 1.0 times eye width ( Fig. 15 ). Ocelli large, slightly raised; ocellar triangle right-angled; POD: OOD = 2.2 ( Fig. 17 ). Head in frontal view with vertex moderately roundly convex between eye top ( Fig. 15 ). Posterior margin of vertex in dorsal view broadly concave ( Fig. 17 ). Head in lateral view with frons barely convex ( Fig. 16 ). Frons near anterior ocellus flat. Temple in dorsal view scarcely developed ( Fig. 17 ). Gena in profile strongly narrowing towards vertex, in upper portion almost liner ( Fig. 16 ). Malar space very short ( Fig. 16 ). Clypeus slightly convex, its width 0.9 times LID, and 2.2 times its height; anterior margin straight, with distinct, slightly depressed and translucent anterior rim; anterolateral corner rounded ( Fig. 12 ). Mandible slen- der, with small subapical tooth. Labrum well exposed, its anterior margin straight medially ( Fig. 12 ). Maxillary palps 3–6 about same length. Scape slightly concave ventrally. Flagellum filiform. Ratio of scape, pedicel and flagellomeres length (on ventral side) 45: 11: 45: 33: 31: 25: 23: 20: 20: 19: 16: 22. Scape length 0.96 times UID. F1 length 4.1 times its maximum width, 1.0 times scape length, and 0.96 times UID.Apical flagellomere blunt apically.

Mesosoma. Pronotum length in dorsal view 0.47 times its maximum width; anterior face short and inclined, differentiated from dorsum by two small but distinctly produced transverse subtriangular processes medially; pos- terior border broadly rounded, indistinctly subangulate medially ( Fig. 17 ). Dorsum of mesoscutum slightly convex. Dorsum of mesoscutellum and metanotum convex. Metapostnotum short and deeply sunken, its median portion almost hidden under overhanging metanotum ( Figs 18, 20 ). Propodeum in dorsal view distinctly parallel-sided, its length 0.8 times its width ( Fig. 18 ); dorsum in lateral view slightly convex; postero-lateral corner produced into tubercle ( Figs 18–20 ); 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 differentlength 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 long spines apically. Protarsomere 1 length 1.5 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 0.65 times metatarsomere 1 length. Meso- and metatarsomere 1 with spines which shorter and rare than on tibia; meso- and metatarsomeres 2–4 ventrally with median longitudinal row of short spines; meso- and metatarsomere 2 except median row of spines with two spines on both sides of row. All tarsomeres 5 without spines ventrally. Tarsal claws symmetrical and bifid, inner tooth broad and obliquely truncated.

Wings. Fore wing ( Fig. 21 ) with distinct light translucent area along apical margin, broad brown band subapically, brown marking at base of M, pterostigma and cells (1A, M+Cu, Cub and C) almost entirely brown. Pterostigma length 4.5 times its height (on inner distance) and 1.4 times Rs 2. Second submarginal cell length 2.9 times its maximum height, narrowed on vein Rs by 0.51 times its own length on vein M, receiving crossvein 1m-cu at basal 0.33 and receiving crossvein 2m-cu at basal 0.9; crossvein 3rs-m arched towards wing apex; crossvein cu-a straight, originating at separation of vein M+CuA; vein M ending far from wing margin; vein Cu 1 not touching wing margin. Hind wing ( Fig. 22 ) translucent, with slightly brownish apical portion; crossvein cu-a evenly arched and anterofurcal.

Metasoma in dorsal view conical shaped, as wide as mesosoma ( Fig. 14 ). Posterior margin of T1–T5 and S1–S5 slightly emarginate medially.

Sculpture. Body matt, except mandible and labrum 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 13, 14 ) except mandible apically and clypeus apically brown, maxillary palps dark-brown, claws brown, metatibia longitudinal brush brown. Body without setae except following: upper frons with few pale thin setae, clypeus ventral face apically with dense short pale thin setae ( Fig. 12 ), mandible and labrum with few pale setae, meso-, metacoxa and propodeum postero-laterally with scattered short grayish setae, S1–S5 with few pale short setae, S6 with many pale short setae, T6 with few long setae. Head and mesosoma with grayish micropubescence, most intensive on propodeum posteriorly. T1–T3 with distinct band of grayish pubescence.

MALE. Unknown.

Distribution. Malaysia (Pahang).

Etymology. The specific name refers to a peculiar character of the clypeus, i.e. its anterior rim depressed and translucent. Treated as an adjective in apposition.

Remarks. The female of this new species is similar to those of Telostholus orientalis , T. yasumatsui , T. malayensis sp. nov., and T. tomentosus sp. nov., but can be separated from them by having the following characteristics: eye broad ( Fig. 15 ), half of MID 1.0 times eye width (eye narrower, 1.4–1,7 in T. orientalis and T. yasumatsui ); POD: OOD = 2.2 (1.4–1.7 in T. orientalis and T. yasumatsui ); cells 1A, M+Cu, and Cub completely brown (par- tially brown in T. yasumatsui ); dorsum of propodeum evenly merging with its posterior face not forming distinct edge (forming distinct edge in T. orientalis ); clypeus ( Fig. 12 ) with slightly depressed and translucent anterior rim (without depressed and translucent anterior rim in T. malayensis sp. nov. and T. tomentosus sp. nov. ( Figs 23 , 34 )); dorsum of propodeum ( Fig. 20 ) in lateral view slightly convex (strongly convex in T. malayensis sp. nov. and T. tomentosus sp. nov. ( Figs 31 , 42 )).

Figures

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.

FIGURES 23–33. Telostholus malayensis sp. nov., ♀, holotype. 23, clypeus and labrum in frontal view. 24 and 25, habitus (24, in dorsal view; 25, in lateral view). 26, head in frontal view. 27, head and pronotum in lateral view. 28, head and pronotum in dorsal view. 29, mesosoma in dorsal view. 30, propodeum in dorso-lateral view. 31, propodeum in lateral view. 32, fore wing. 33, hind wing. Scale bar: 1.0 mm for 24, 25, 32, 33; 0.5 mm for 29; 0.2 mm for 26–28, 30, 31; 0.1 mm for 23.

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.