Telostholus celebes Loktionov & Lelej, 2019

Loktionov, Valery M. & Lelej, Arkady S., 2019, The spider wasp genus Telostholus Haupt, 1929 (Hymenoptera, Pompilidae) in Indonesia, with the description of three new species, Zootaxa 4648 (2), pp. 260-272 : 262-266

Telostholus celebes Loktionov & Lelej , sp. nov.

( Figs 1–23 )

Material examined. Holotype, ♀ “ Celebes, Latimodjonggeb. 18–1500 m Ende” [ Indonesia, Sulawesi Is., South Sulawesi Prov., Mt. Latimojong ] VII.1930 (G. Heinrich) [ MNHU] . Paratype: 1♂, same label as in the holotype [ MNHU] .

Diagnosis. Female. The female of this new species can be easily separated from those of other congeners by the following combination of characters: (1) fore wing translucent, with distinct basal and subapical brown bands and milky-white apical portion ( Fig. 8 ); (2) dorsum of propodeum with high tubercle postero-laterally ( Figs 5, 6 ); (3) F1 4.25 times as long as maximum width; (4) metapostnotum shallow, almost parallel-sided medially ( Figs 5, 6 ).

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 produced above dorsal eye margin and raised between posterior ocelli ( Fig. 11 ); (2) posterior margin of vertex in dorsal view broadly and evenly concave ( Fig. 13 ); (3) fore wing translucent, with evenly brownish apical portion ( Fig. 16 ).

Description. FEMALE. Length: body 9.2 mm; forewing 8.5 mm. Head 1.1 times as wide as height; MID 0.58 times as long as head width in frontal view, half of MID 1.35 times as long as eye width ( Fig. 2 ). Ocelli large, slightly raised; ocellar triangle right-angled; POD: OOD = 1.25 ( Fig. 4 ). Head in frontal view with vertex producing beyond eye top and roundly convex between eyes top ( Fig. 2 ). Posterior margin of vertex in dorsal view broadly concave ( Fig. 4 ). Head in lateral view with frons slightly convex ( Fig. 3 ). Temple in dorsal view slightly developed ( Fig. 4 ). Gena in profile strongly narrowing towards vertex ( Fig. 3 ). Malar space short ( Fig. 3 ). Clypeus slightly convex, 0.8 times as wide as LID, and 2.3 times as wide as height; anterior margin straight; anterolateral corner distinct but slightly rounded ( Fig. 2 ). Mandible stout with small subapical tooth. Labrum with broadly rounded anterior margin. Maxillary palps 3–6 about same length. Flagellum filiform; scape normal shaped; ratio of scape, pedicel and flagellomeres length (on ventral side) 27: 8: 29: 26: 24: 21: 18: 17: 15: 14: 14: 16; scape 0.87 times as long as UID; F1 4.25 times as long as maximum width and 0.95 times as long as UID; apical flagellomere pointed apically.

Mesosoma. Pronotum in dorsal view 0.45 times as long as its maximum width ( Fig. 4 ); anterior face inclined, distinctly differentiated from dorsum by two slightly produced transverse subtriangular processes medially ( Figs 1, 4 ); posterior border rounded ( Fig. 4 ). Dorsum of mesoscutum slightly convex in anterior half. Dorsum of mesoscutellum and metanotum convex. Posterior margin of mesoscutellum widely arcuate ( Fig. 6 ). Metapostnotum shallow, almost parallel-sided medially, 0.25 times as long as metanotum medially ( Figs 5, 6 ). Propodeum in dorsal view 0.88 times as long as wide ( Fig. 6 ); dorsum in lateral view barely convex, with high tubercle postero-laterally ( Fig. 5 ); dorsum evenly merging with posterior face not forming distinct edge; posterior face inclined and flattened.

Legs. Proleg without spines, except following: protibia outer face with two spines, protibia with few differentlength spines apically, protarsomere 1 with two longitudinal rows of very short spines ventrally, protarsomeres 2 and 3 with median longitudinal row of very short spines ventrally, protarsomere 4 with very long spines apically, longest one 0.45 times as long as protarsomere 5, protarsomere 5 without spines ventrally. Protarsi somewhat shortened, protarsomere 1 1.2 times as long as protarsomere 2–4 combined. Mesofemur with one short spine dorso-apically. Metafemur with 3–4 spines dorso-apically. Meso- and metatibia with scattered long spines. Metatibia longer spur 0.58 times as long as metatarsomere 1. Meso- and metatarsomere 1 with shorter than on tibia spines; mesotarsomere 1 ventrally with median row of short spines in apical half; 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. Tarsomere 5 without spines ventrally. Tarsal claws symmetrical and bifid, inner tooth broad and obliquely truncated.

Wings. Fore wing ( Fig. 8 ) translucent, with two distinct brown bands and milky-white apical portion; pterostigma brown, 6.1 times as long as its own height (on inner distance) and 2.0 times as long as Rs 2; second submarginal cell 2.4 times as long as maximum height, narrowed on vein Rs by 0.58 times its own length on vein M, receiving crossvein 1m-cu at basal 0.26 and receiving crossvein 2m-cu at basal 0.85; crossvein 3rs-m arched towards wing apex; crossvein cu-a barely curved, originating just from separation of vein M+CuA; vein M ending far from wing margin; vein Cu 1 almost touching wing margin. Hind wing ( Fig. 9 ) translucent, with brownish apical portion and indistinct brownish spot basally; crossvein cu-a evenly arched and anterofurcal.

Metasoma. In dorsal view conical shaped, slightly wider than mesosoma. Posterior margin of T1 almost straight, T2–T5 and S1–S5 slightly emarginate medially. T5 and S5 somewhat compressed laterally.

Sculpture. Body matt, except mandible and metapostnotum polished, anterior margin of clypeus, posterior face of propodeum and metasoma somewhat polished. Body with inconspicuous microsculpture. Frons very densely and minutely punctate, with basomedian short line. Metapostnotum with two transverse striae anteriorly. Dorsum of propodeum densely and minutely punctate, punctures somewhat larger and coarser than on frons; posterior face with scattered indistinct punctures. Antenna and legs matt, except scape somewhat polished.

Colour and pubescence. Body black ( Fig. 1 ) except apical half of mandible brown, maxillary palps dark-brown, claws brown, longitudinal brush on metatibia golden-brown. Body without setae except: upper frons with 17 pale and different-length setae, mandible and labrum with few thin pale setae, coxae with scattered short whitish setae, S1–S5 with few pale setae, S6 with scattered short and few very long setae, T6 apically with few long setae. Head, mesosoma and coxae with gray pubescence. Femora and tibiae with sparse gray pubescence. Anterior half of T2–T4 with gray pubescence. S1–S5 with sparse iridescent micropubescence.

MALE. Length: body 6.0 mm; forewing 5.8 mm. Head 1.17 times as wide as height; MID 0.67 times as long as head width in frontal view, half of MID 2.14 times as long as eye width ( Fig. 11 ). Ocelli large, slightly raised; ocellar triangle obtuse-angled; POD: OOD = 1.3 ( Fig. 13 ). Head in frontal view with vertex producing beyond eye top and raised between posterior ocelli ( Fig. 11 ). Posterior margin of vertex in dorsal view broadly concave ( Fig. 13 ). Head in lateral view with frons evenly convex ( Fig. 12 ). Temple in dorsal view slightly developed ( Fig. 13 ). Gena in profile very narrow ( Fig. 12 ). Malar space short ( Fig. 12 ). Clypeus slightly convex, 0.8 times as wide as LID, and 2.68 times as wide as height; anterior margin straight; anterolateral corner distinct and rounded ( Fig. 11 ). Mandible stout with small subapical tooth. Labrum broadly rounded, as broad as posterior margin of clypeus, its anterior margin straight medially. Maxillary palps 2–5 about same length, palp 6 slightly longer than others. Flagellum somewhat stout; scape normal shaped; flagellomeres 2–9 serrate ventrally; ratio of scape, pedicel and flagellomeres length (on ventral side) 26: 10: 19: 21: 23: 22: 20: 19: 18: 18: 19: 17: 22; scape 0.44 times as long as UID; F1 1.72 times as long as maximum width and 0.32 times as long as UID; apical flagellomere pointed apically.

Mesosoma. Pronotum in dorsal view 0.39 times as long as its maximum width; anterior face not differentiated from dorsum; posterior margin rounded and somewhat subangulate medially. Dorsum of mesoscutum slightly and evenly convex. Dorsum of mesoscutellum and metanotum convex. Metapostnotum shallow, almost parallel-sided medially, 0.27 times as long as metanotum medially ( Fig. 15 ). Propodeum in dorsal view 0.86 times as long as wide ( Fig. 15 ); dorsum in lateral view slightly convex ( Fig. 14 ); posterior face not 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 single short spines ventrally, protarsomere 5 without spines ventrally. Protarsomere 1 1.2 times as long as protarsomere 2–4 combined. Protarsomere 5 in dorsal view symmetrical, 1.72 times as long as its maximum width. Mesofemur with two short spine dorso-apically. Metafemur with four spines dorso-apically. Meso- and metatibia with scattered long spines. Metatibia longer spur 0.78 times as long as metatarsomere 1. Mesotarsomere 1 with short spines; metatarsomere 1 with longer than on mesotarsomere 1 spines located ventrally and laterally. Meso- and metatarsomeres 2–4 with few short spines ventrally. Tarsomere 5 without spines ventrally. Tarsal claws symmetrical and bifid, inner tooth broad and pointed apically.

Wings. Fore wing ( Fig. 16 ) translucent, with brownish apical portion from radial and second submarginal cells to wing top; pterostigma brown, 6.6 times as long as its own height (on inner distance) and 2.5 times as long as Rs 2; second submarginal cell 2.33 times as long as maximum height, narrowed on vein Rs by 0.58 times its own length on vein M, receiving crossvein 1m-cu at basal 0.25 and receiving crossvein 2m-cu at basal 0.74; crossvein 3rs-m scarcely arched; crossvein cu-a scarcely arched, originating just beyond separation of vein M+CuA; vein M ending far from wing margin; vein Cu 1 not touching wing margin. Hind wing ( Fig. 17 ) translucent, with brownish apical portion; crossvein cu-a evenly arched and anterofurcal.

Metasoma. In dorsal view lanceolate, narrower than mesosoma. Posterior margin of S6 emarginate, with triangular process medially, and small curved hook on both side of emargination ( Fig. 18 ). Genitalia ( Figs 19–21 ) with broad paddle-shaped paramere; apical part of volsella oval, its ventral face with dense erect bristles ending by small ball; parapenial lobes broad. Hypopygium in lateral view with flat apical half ( Fig. 23 ), in ventral view evenly narrowing to apex ( Fig. 22 ); ventral face with scattered thin erect setae.

Sculpture. Body mostly slightly polished, with frons noticeably polished ( Figs 11, 13 ). Body with inconspicuous microsculpture. Frons smooth, with very small scattered pits, with median impressed interrupted line basally. Metapostnotum glossy. Dorsum of propodeum densely and gently punctate. Antenna matt, except scape somewhat polished. Legs somewhat polished except tibiae and tarsi matt.

Colour and pubescence. Body black ( Fig. 10 ) except apical half of mandible brown, maxillary palps darkbrown, claws brown. Body without setae except following: upper frons with eight pale and different-length setae, mandible with three thick brown setae, S2–S5 with few pale setae, T6–T7 with scattered single long setae. Body with sparse gray pubescence. Frons mostly without pubescence ( Fig. 11 ).

Distribution. Indonesia: Sulawesi.

Etymology. The new species is named after Celebes, former name of Sulawesi, the island where the type material was collected. Treat as a noun in apposition.

Sex association. We consider the female and male as opposite sexes of the same species based on similar clypeus shape ( Figs 2 , 11 ), and the shallow metapostnotum that is parallelsided medially ( Figs 6 , 15 ). In addition, the female and male were collected in same place and date.

Figures

FIGURES 1–9. Telostholus celebes sp. nov., ♀, holotype. 1. Habitus, lateral view. 2. Head, frontal view. 3. Head, lateral view. 4. Mesoscutum, pronotum and head, dorsal view. 5. Tubercle on propodeum, dorso-lateral view. 6. Mesoscutellum, metanotum, metapostnotum, propodeum and T1 part., dorsal view. 7. Head and mesosoma, lateral view. 8. Fore wing. 9. Hind wing. Scale bar: 1.0 mm for 1; 0.5 mm for 2–4 and 6–9; 0.2 mm for 5.

FIGURES 10–23. Telostholus celebes sp. nov., ♂, paratype. 10. Habitus, lateral view. 11. Head, frontal view. 12. Head, lateral view. 13. Head, dorsal view. 14. Mesosoma, lateral view. 15. Mesoscutellum, metanotum, metapostnotum, propodeum and T1 part., dorsal view. 16. Fore wing. 17. Hind wing. 18. S6 part., ventral view. 19–21. Genitalia (19, lateral view; 20, ventral view; 21, dorsal view). 22, 23. Hypopygium (22, ventral view; 23, lateral view). Scale bar: 1.0 mm for 10; 0.5 mm for 16 and 17; 0.2 mm for 11–15; 0.1 mm for 18–23.