Panurginus nigripes F. Morawitz

Romankova, Tatiana G. & Astafurova, Yulia V., 2011, Bees of the genus Panurginus in Siberia, Far East of Russia, and Allied Areas (Hymenoptera: Andrenidae, Panurginae), Zootaxa 3112, pp. 1-35 : 30-31

12. Panurginus nigripes F. Morawitz

P. n i g r i p e s F. Morawitz, 1880: 357.

Diagnosis. Externally, by its shagreened terga, Panurginus nigripes would be placed in the herzi -group; by some characters of pregenital sterna and genitalia (e.g., S6 without lateral hair tuft, S7 with narrowly separated protrusions, narrow gonostyli and widened penis valves) P. nigripes is closer to the niger -group of species. The male is well-defined by the shape of S6−S8, genitalia and following combination of characters: round labral plate, pedicel as long as wide, middle basitarsus 5 times longer than wide; face on upper part with merged pits; scutum finely shagreened, medially smoother, with dense pits about a pit diameter apart; T1–T3 with small pits about 1−2 diameters apart. S7 apical structure resembling those of P. niger and P. ro m an i just from the ventral view being in the same plane with sternal disc, wile at the latter species apical projections are bent ventrally. S6 posterior margin medially plane, straight, laterally slightly raised, with short pubescence; among the studied species, only P. p i c i p e s, another Chinese species, has S6 of the same type. Gonostylus narrow, slightly widened dorso-ventrally (lateral view), though in dorsal and ventral expositions an illusion of a finger-like shape apears. Penis valve apically triangularly enlarged and bent inside like at P. c r a w f ord i and P. ro m a ni.

Geographical distribution. Northern China (Gansu).

Type material. Holotype: 3, CHINA, Gansu [gold circle; nigripes Mor., Typ. (F. Morawitz’ handwriting); 77751 (Gansu, coll. Przhewalsky)].

Description. MALE. Body length 5.5 mm. Shape. Head transverse (0.8), as wide as mesosoma. Antenna attaining posterior end of scutum; pedicel as long as wide; F1 slightly longer than wide, F2 and F3 slightly transverse, F4–F10 as long as wide or slightly longer than wide; last flagellomere 1.6 times longer than wide. Labral plate rounded, transverse. Facial fovea deep, straight, twice narrower than distance to eye, equidistant to eye all along. Genal area as wide as eye, parallel-sided on half length. Middle and hind basitarsi narrow, parallel-sided, about 5 times as long as wide; mediotarsi conical, elongate. Metasomal terga with marginal zone depressed, slightly enlarged medially, on T1 and T2 ca 1/3, T3 and T4 ca 1/2 discal length. Metasomal Sterna & Genitalia ( Figs 112–117 ). Sterna preapically slightly swelled; S2−S4 posterior margins slightly incurved, discs with erect, grayish hairs thin and sparse. S4 postero-laterally with long, plumose hairs. S5 posterior margin incurved twice wider than deep, with hair fringe; disc postero-laterally with moderately dense, long, grayish hairs. S6 posterior margin divided to three parts: central part widely rounded, even, longer than raised lateral parts; raised areas pubescent, with internal angle rounded. S7 apically with 2 parallel teeth in the same plane with sternal disc; the teeth are flat, pointed, basally wider than distance between their apexes. S8 straight (lateral view); apical plate as long as wide, smoothly bent ventrally at 30° ventrally with dense, short pubescence. Gonocoxite without dorsoapical emargination. Gonostylus almost parallel-sided, preapically slightly enlarged, apically narrow, finger-like (lateral view). Penis valve flattened latero-laterally, longitudinally convolute with opening inside, apex narrowly rounded and bent ventrally. Sculpture. Paraocular area on upper part, frons and vertex matt, shagreened, with merged pits (20–25 µm). Genal area shiny, with merged pits, along eye glossy, impunctate. Supraclypeal area shiny, slightly shagreened, with shallow pits (10–20 µm) about 2 diameters apart; subantennal area glossy, with a few pits. Clypeus shiny, smooth, with pits of various sizes a few diameters apart (10–25 µm / 1−4), on disc impunctate. Scutum shiny, finely shagreened, with round pits deep and dense (15–25 µm / 0.5–2), on periphery confluent. Scutellum medially glossy, on periphery shagreened, punctured alike scutum. Metanotum shagreened, with shallow, small pits about a pit diameter apart. Mesepisternum shagreened, with dense, shallow pits (10–25 µm / 1.0–2.0). Propodeum shagreened, laterally with sparse, shallow pits, horizontal part of propodeal triangle rugose, vertical part with pits merged. Metasomal terga mostly shagreened, T1–T4 postero-laterally partially smooth with dense punctures and small pits about 1–2 diameters apart (5–10 µm / 0.5–3); marginal zones tessellate, impunctate. Metasomal sterna shiny, tessellate, with sparse, tiny hair pores. Coloration. Wing yellowish; veins, stigma and tegulae brown. Antenna beneath yellowish-brown. Clypeus yellow with apical and lateral margins narrowly black. Fore tibia anteriorly yellow, tarsi dark-brown. Vestiture. Pubescence unremarkable. T6 and T7 with grayish fimbria. FEMALE unknown.

Remarks. Morphological details of all pregenital/genital elements of the male keep this species apart from other studied species.

Figures

FIGURES 104 – 117. 104 — Panurginus romani, female, head; 105 — P. h e r z i, female, head; 106 – 111, P. arsenievi, male: 106 — genitalia dv, 107 — clypeus, 108 — S 8 v, 109 — S 8 l, 110 — S 7 v, 111 — S 6 v; 112 – 117, P. nigripes, male: 112 — genitalia dv, 113 — genitalia l, 114 — S 8 dv, 115 — S 8 l, 116 — S 7 v, 117 — S 6 v. Abbreviations: l—lateral, d—dorsal, v—ventral views. Lateral views oriented with the ventral side on right.