Arachnospila (Ammosphex) sibirica Loktionov & Lelej

Loktionov, Valery M. & Lelej, Arkady S., 2015, New and little-known species of Arachnospila (subgenus Ammosphex) (Hymenoptera: Pompilidae) from East Siberia, Zootaxa 3911 (2), pp. 218-230 : 225-226

Arachnospila (Ammosphex) sibirica Loktionov & Lelej , sp. nov.

( Figs 11–13 , 23, 24)

Type material. Holotype, ♂, RUSSIA, 13 km SW Samagaltai, Dyttyg-Khem River, 8.VII.2013 (V. Loktionov, M. Proshchalykin) [ IBSS]. Paratypes, RUSSIA: 1 ♂, Tuva, 20 km SSW Erzin, Tore-Khol Lake, 3.VII.2013 (VL, MP); 1 ♂, Tuva, 13 km SW Samagaltai, Dyttyg-Khem River, 10.VII.2013 (VL, MP); 1♂, Tuva, 7 km SW Erzin, Tes- Khem River, 13.VII.2014 (AL, MP, VL); 1 ♂, Republic of Altai, 20 km NW Kosh-Agach, 14.VII.2007 (SB) [ IBSS].

Diagnosis. MALE. Volsella basally with long strong erect setae. Penial valve apically without spicules. Gonostyli with erect setae in apical portion only. FEMALE. Characters unknown.

Description. MALE. Length of body 5.0–6.0 mm. Length of fore wing 4.5–5.0 mm. Width of head 1.1 × its height. Ocelli small, ratio POD/OOD 1.1–1.2 ×. Width of gena medially 0.4–0.5 × width of eye medially (lateral view). Clypeus weakly longitudinally convex, anterior border straight or weakly emarginate, with narrow smooth rim. Labrum flat, anterior border straight. Malar space weakly developed. Length of flagellomere 1 1.9–2.1×´its width. Relation of scape, pedicel and two first flagellomeres 20–25:11–13:20–24:24–25. Apical flagellomere pointed apically, sometimes with weakly visible small concave smooth area. Length of mesosoma dorsally 2.0–2.2× its maximum width. Length of pronotum medially 0.3 × its width medially, posterior pronotal border angulate. Pronotum distinctly broadened posteriorly, its anterior width 0.8 × posterior one. Length of metanotum medially 1.1–1.2 × length of metapostnotum. Metapostnotum with 3–4 fine transverse striae near anterior border, and gentle micropunctation in posterior portion. Posterior border of metapostnotum with small median smooth shiny triangle. Median length of propodeum 0.7–0.8 × its maximum width. Wings slightly infuscated with darker apical part, venation of fore wing as in Fig. 23, venation of hind wing as in Fig. 24. Third radio-medial (submarginal) cell of fore wing nearly trapeziform, triangular or petiolate. Posterior border of S6 broadly arcuate, emarginated. Hypopygium as in Figs 12, 14 . Genitalia as in Fig. 11 .

Frons, vertex and clypeus with scattered long light brown erect setae, sometimes lacking setae. Gena and propleura with dense long pale brown erect setae, sometimes scattered or lacking setae. Mandible with 2–3 strong and few soft curved erect setae. Pronotum, mesoscutum, scutellum and sides of propodeum with a few shorter pale brown erect setae, sometimes lacking setae. Other body parts lacking setae. Head, mesosoma, propodeum, fore coxa anteriorly with iridescent mainly silver pubescence (denser on lower part of face and base of mandible). Propodeum with regular silver pubescence. Legs and metasoma with iridescent mainly brownish micropubescence. Body regularly micropunctate. Body and legs black.

FEMALE. Unknown.

Comparison. The male of this species resembles that of Mongolian Arachnospila (Ammosphex) timur Wolf & Móczár, 1972 by having similar shape of hypopygium, but easily differs by having volsella basally with long hard erect setae (short, soft setae in A. (A.) timur ), by having penial valve apically without spicules (with spicules in A.

(A.) timur ), by having gonostyli with erect setae in apical portion only (erect setae along all outer side in A. (A.) timur ).

Etymology. Named after Siberia, the largest region of the Russia, where this species is distributed.

Distribution. Russia (Tuva, Republic of Altai).

Ecology. Inhabits steppe areas.

Figures

FIGURES 11 – 16. Genitalia and sterna 7 and 8 (hypopygium) of male. 11, 14. Genitalia (ventral view). 12, 13, 15, 16. sterna 7 and 8 (12, 15, ventral view; 13, 16, lateral view). 11 – 13. Arachnospila (Ammosphex) sibirica sp. nov., holotype. 14 – 16. A. (A.) moczari sp. nov., holotype. Scale bar = 0.5 mm.