Panurginus kropotkini, 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 : 23-24

7. Panurginus kropotkini sp. n.

Diagnosis. The female of Panurginus kropotkini has smooth interspaces on the metasomal terga like at P. niger , which is the most usual species among the bees of the genus in Primorskiy Kray; but metasomal terga of P. kropotkini with pits larger than at P. niger . The female of P. kropotkini is very well recognizable by its clypeus shagreened and with longitudinal grooves; labral plate longitudinally sulcated; propodeal triangle entirely strongly rugose including vertical part.

Etymology. The species is called in memory of Pyotr Alexeyevich Kropotkin (Russian: Петр Алексеевич Кропоткин; 1842–1921), a zoologist, an evolutionary theorist, geographer and one of the world's foremost social philosophers and anarchists. Kropotkin traveled the Amur region and the northern part of Manchuria; he published descriptions of his travels, and materials for the orography of Siberia.

Geographical distribution. Russia, Primorskiy Kray.

Type material. Holotype: Ƥ, RUSSIA, Primorskiy Kray, Barabash-Levada, 44° 52’ 01” N, 134° 47’ 18” E, 20.VII.1982, A. Leley [Приморье, Барабаш-Левада, 20.VII.1982, A. Лелей].

Description. FEMALE. Body length 4.5 mm. Wing yellowish-brown fumigated, with brown veins. Body poorly pubescent; face coarsely, mesosoma and metasoma finely sculptured. Shape. Head transverse (0.8), as wide as mesosoma. Pedicel as long as wide, F1−F3 subequal in length, F1 elongate, F2 and F3 transverse; other flagellomeres as wide as long or longer. Labral plate apically narrowed and rounded, with transverse depression sulcated longitudinally. Facial fovea long and narrow, parallel-sides, apically not enlarged, rounded, as wide as distant to eye; lower end a little closer to eye. Genal area wider than eye (1.25), wide on the most part of its length. Middle basitarsus parallel-sided, 3 times as long as wide, with straight distal margin. Hind basitarsus parallel-sided, 4.5 times as long as wide; TM2 and TM3 elongate, TM4 as long as wide. Metasomal terga with marginal zone depressed, on T1 ca 1/2, T2 and T3 2/3, on T4 as long as discal length; premarginal lines rounded, laterally more abrupt. Sculpture. Antennal scape shiny, with dense punctures. Vertex tessellate, with round pits about a pit diameter apart (10−20 µm / 0.5−2). Paraocular area tessellate, on lower half smoother; upper half with tiny pits about a diameter apart (10−15 µm / 0.5−1), below pits are larger and sparser (15−25 µm / 1−3). Subantennal and supraclypeal areas shiny, tessellate, with dense, deep pits 1−3 diameters apart (ca 10 µm). Clypeus matt, shagreened, with dense, large pits creating longitudinal grooves a diameter or less apart to confluent (15−25 µm / 0.5−1.5). Genal area shiny, delicately tessellate, with pores and pits about a pit diameter apart, below sparser. Scutum on disc shiny, tessellate, on posterior half smoother, with sparse pits and punctures 1 or more diameters apart; on periphery shagreened, with pits small and merged. Scutellum with scattered pits (10−25 µm / 1−4), on periphery smaller and denser; central longitudinal depression with large pits merged. Mesepisternum shagreened, with shallow pits 1−2 diameters apart (15−20 µm / 0.5−3). Propodeum shagreened, laterally with sparse punctures; propodeal triangle rugose entirely, including vertical part. Metasomal terga glossy, laterally and basally tessellate; marginal zones delicately tessellate, impunctate; T1 with punctures a few diameters apart, T2 and T3 discs with punctures and pits 1−2 pit diameters apart (5−15 µm / 1−5), laterally denser; T4 tessellate, punctured sparser than other terga. Metasomal sterna shiny, tessellate, with scattered, small hair pores; discs with short, sparse, tiny hairs; S3 medially with premarginal pores denser and deeper; S4 and S5 shagreened, with dense pores about a pore diameter apart. Coloration. Wing yellowish-brown, with brown veins. Flagellum beneath brown. Claws and spurs yellow. Pygidial plate reddish, apically black. Vestiture. Pubescence white; only pygidial and prepygidial fimbriae, as well as S4 and S5 marginal, dense and long hair fringes are brownish-yellow.

Discussion. Exclusively specific, roughly sculptured clypeus and labral plate at the female, leading to a suggestion that the male of this species should passes some conspicuous morphological characters as well.