Panurginus obruchevi, Romankova, Tatiana G. & Astafurova, Yulia V., 2011

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 : 31

13. Panurginus obruchevi sp. n.

Diagnosis. The new species belongs to the herzi- group of species. Both exteriorly and in pregenital/genital architecture, Panurginus obruchevi resembles P. a l t i c o l u s, from which it differs by F1 twice longer than F2 ( P. alticolus [P. a.]: 1.5 times longer); labral plate stronger narrowed apically, almost triangular (P. a.: trapezoid) (Fig. 19); S6 as long as wide, laterally rounded (P. a.: transversal, laterally angled) and postero-lateral hair tuft overlapping angle of the sternum (P. a.: the tuft is more distant, does not cover sternal margin). S7 laterally widely rounded (P. a.: angled), with posterior margins short and shoulders undeveloped (P. a.: postero-lateral shoulders developed well, with posterior margin as long as lateral side of the shoulder); disc lacking median carina (P. a.: carina all disk along, dark). Gonostylus 4.1 times as long as wide (P. a.: 2.4 times).

Etymology. Vladimir Afanasievich Obruchev (Russian∶ Владимир Афанасьевич Обручев﹔ I863—I956) was a Russian geologist who specialized in the study of Siberia and Central Asia. He was also one of the first Russian science fiction authors.

Geographical distribution. East Kazakhstan.

Type material. Holotype: 3, East KASAKHSTAN, SW Altai, E Azutau Ridge, 10 km SW Urunkhayka, alt. 2200–2300 m, 18.VI.1997, R. Dudko, V. Zinchenko (48°48' N, 86°1' E) [ЮЗ Алтай, вост. хр. Азутау, 10 км ЮЗ Урунхайки, h=2200–2300, альпика, 18.VI.1997, Р. Дудко, В. Зинченко leg.].

Description. MALE. Body length 8 mm. Shape. Head transverse (0.8), as wide as mesosoma. Antenna attaining scutellum; pedicel slightly transverse; F1 elongate, twice as long as F2; F2 transverse, other flagellomeres as long as or slightly longer than wide. Labral plate apically strongly narrowed, almost triangular (Fig. 19). Facial fovea shallow, short; upper end enlarged, 3 times distance to eye, lower end as wide as distance to eye. Genal area as wide as eye, from half length narrowing towards mandible. Middle basitarsus 3.5 times as long as wide apically; enlarged towards distal end, which is 3 times proximal; mediotarsi short, cordate, TM2 as long as wide, TM3 and TM4 transverse. Hind basitarsus on most length parallel-sided, 3.5 times as long as wide, basally narrowed; mediotarsi cordate, TM2 as long as wide, TM3 and TM4 transverse. Metasomal terga with marginal zone depressed, medially enlarged, on T1 ca 1/4, T2 ca 1/3, T3 and T4 ca 1/2 discal length. Metasomal Sterna & Genitalia (Figs 14–18, 20–23). S2−S5 posterior margins slightly concave. S5 with marginal, short, white hair fringe and lateral tuft of long hairs. S6 as wide as long, ventro-laterally with long hair tuft; posterior margin medially arcuate, bent ventrally and narrowly pubescent inside. S7 basal margin triangularly incurved (<90˚); lateral sides of sternum rounded, postero-lateral angles small, rounded; apical bifurcation wide (4/1), shallowly arched, neck with short median carina; disc without carina. S8 bent ventrally, with lateral flaps narrow, obtusely angled, almost as long as posterior part of sternum; apical plate bent ventrally at 45°, with basal hill angled and slightly pulled posteriorly; apical plate ventrally, on posterior half with dense, short hairs. Gonocoxite with dorso-apical excavation deep and wide. Gonostylus basally shortly narrow, with main body 3 times longer than wide, flattened, apically slightly narrowed; internally, with dense white hairs short and thin; externally, hairs sparser and longer. Penis valve on basal half wide, at the middle of length narrowed and bent inside, with apex bulging and bent ventrally and outside. Sculpture. Body with dense punctures. Vertex shagreened, with dense, shallow pits (15−20 µm / 0.5−1). Paraocular area on upper part shagreened, punctured like vertex; below, tessellate, with large, shallow, oval pits merged to confluent, (20−25 µm / 0.5−1). Frons matt, shagreened, with merged, shallow pits. Genal area shiny, smooth, with dense, deep pores and pits about a pit diameter apart (15−25 µm / 0.5−2). Supraclypeal and subantennal areas delicately tessellate, with shallow pits a few diameters apart (10−15 µm / 1−4). Clypeus smooth, shiny, on disc with sparse pits and pores, on periphery about a pit diameter apart (10−20 µm / 0.5−4). Scutum anteriorly delicately tessellate, with deep, round pits dense to confluent (10−20 µm / 0.5−1). Scutellum posteriorly shagreened; with dense, deep, round pits (10−20 µm / 0.5−1) confluent on periphery. Metanotum shagreened, with merged, shallow punctures and pits (5−10 µm / 0.5−1). Mesepisternum shagreened, with shallow pits and pores about a pit diameter apart, on lower half denser to confluent (20−25 µm / 0.5−2). Propodeum laterally matt, shagreened, with pits about a pit diameter apart; posterior surface shinier; propodeal triangle matt, with horizontal part finely rugose. Metasomal terga mostly shagreened, with punctures and pits about a pit diameter apart (5−10 µm / 0.5−3); premarginal lines abrupt; marginal zones tessellate or smooth. T1 tessellate, punctured slightly sparser than T2 and T3, with posterolateral convexities glossy, impunctate. Metasomal sterna shiny, tessellate, medially impunctate, laterally with dense, tiny hair pores about a diameter apart. Coloration. Clypeus yellow, with black lateral margins. Antenna black. Wing transparent, stigma and veins brown. Fore tibia anteriorly, fore and middle tarsi and spurs yellow; middle mediotarsi brownish. Vestiture. Pubescence white, denser than at most other congeneric species; on head, mesosoma, T5 and T6 hairs long and dense; T1−T4 discs with short, dense hairs, laterally with loose, long hairs. FEMALE unknown.