Iteaphila pumila Sinclair, 2012

Sinclair, Bradley J. & Shamshev, Igor V., 2012, 3561, Zootaxa 3561, pp. 1-61 : 40-42

Iteaphila pumila Sinclair sp. nov.

( Figs. 2B, 5A, 8D, 12A)

Type material. HOLOTYPE, ♂ labelled: “Unalakleet,/ Alaska,/ 16. VI.[19]61/ R. Madge”; “ HOLOTYPE / Iteaphila / pumila/ Sinclair” ( CNC) . PARATYPES: CANADA. Northwest Territories: Aklavik, 25.vi.1931, Lot. 241, Bryant (3 ♂, CAS); Reindeer Depot, Mackenzie Delta , 24.vi.-6.vii.1948, JRV , W.J. Brown (12 ♂, 4 ♀, CNC; 1 ♀, USNM) . Yukon: Dempster Hwy, km 416, 22–28.vi. 1980, 750 m, DMW & D. Lafontaine (1 ♂, CNC); Dempster Hwy , km 420, MT , 66º35'N 136º18'W, 3–7.vii.1979, ROM Fld Pty (1 ♂, ROM); Eagle Plains, 65º47'N 137º47'W, 6.vii.1985, E. Bijdemast (1 ♀, UBCZ); Mason Hill, 67º19'N 137º40'W, 4.vii.1981, CSG (7 ♂, 6 ♀, UBCZ); North Fork Pass , Ogilvie Mts. , 3500', 17,19. vi.1962, PJS, R . E. Leech (3 ♂, 1 ♀, CNC); North Fork Pass, Ogilvie Mts., 4100', 20.vi.1962, PJS (4 ♂, CNC); North Fork Pass , Ogilvie Mts. , mi 42 Peel Plateau Rd. , 3500', 25.vi.1962, PJS (5 ♂, CNC); North Fork Pass , 64º31'N 138º13'W, 3500–4500', 27.vi.1982, C.S. Cannings, L. Vashington, R . A. Moore (1 ♂, UBCZ); E. Old Crow, Mason Hill, 2500', alpine slope, 67º24'N 137º48'W, 4.vii.1981, B.D. Marshall (1 ♂, 1 ♀, ROM); Richardson Mts , Arctic Circle , 13 km N, 66º40'N 136º18'W, 6.vii.1982, C.S. Cannings, L. Vashington, R . A. Moore (2 ♂, 1 ♀, UBCZ); Solomon Dome, Dawson , 4048', 3.vii.1949, P.F. Bruggemann (1 ♀, CNC) . RUSSIA. Arkhangelsk Prov. (Nenets Autonomous Okrug): near Narjan-Mar , 6.vii.2008, N. Vikhrev (1 ♂, ZIN) . Chukotka Autonomous Okrug: Komsomolskiy, Chaunskiy District [about 69.42N 170.19E], shrubby tundra, 6.vii.1963, Gorodkov (1 ♂, ZIN); Autonomous Okrug: Pevek [69º42'00''N, 170º19'00''E], tundra, 29.vi.1963, Gorodkov (5 ♂, ZIN); same locality, 3.vii.1963, Gorodkov (2 ♂, ZIN); 24 km SE of Pevek, on flowers of Dryas sp. , 1.vii.1963, Gorodkov (1 ♂, ZIN); 20 km SSE Iul'tin [68º26'00''N, 179º18'00''E], Amguema R , 22.vii.1963, Gorodkov (1 ♂, ZIN) . Irkutsk Prov., Chersky peak, 14.vii.1984, Zlobin (1 ♀, ZIN) . Magadan Prov.: Ust'-Omchug, 1.vii.1971, mountain pine ( Pinus pumila ) on mountain top, Gorodkov (1 ♀, ZIN); upper current of Bol'shaya R , 63.01N 171.50E, 330 m, 16.vii.1959, Gorodkov (1 ♀, ZIN); Ust' - Omchug, 1.vii.1971, Gorodkov; mountain pine ( Pinus pumila ) on mountain top (1 ♂, ZIN); Ust' - Omchug, 1.vii.1971, leg. Gorodkov; mountain pine ( Pinus pumila ) on mountain top (1 ♂, ZIN); Indigirka R , mouth of In'yali R , larch forest with dwarf ( Arctic ) birch and moss on hill, 800–900 m, 23,24. vi.1976, V . Kovalev (1 ♂, 2 ♀, ZMMU); Indigirka R , course of Ystan-Yuryakh R , Momsky District , 29.vi.1976, V . Kovalev (1 ♀, ZMMU); Indigirka R , Ust'-Nera , airport, 14.vi.1976, V . Kovalev (1 ♀, ZIN). Yakutia: Kyusyur [70º41'05.47''N, 127º21'40.36''E], lower reach of Lena River , shore, sand, 14.vii.1957, Gorodkov (1 ♂, ZIN) . USA. Alaska: Unalakleet , 15–28.vi., 3.vii.1961, B.S. Heming, R . Madge (30 ♂, 12 ♀, CNC; 1 ♂, 1 ♀, USNM) .

Recognition. This is a small species with short mouthparts, discal cell produced distally, short male cercus and short apical section of the phallus with rounded apex.

Description. Wing length 2.2–2.5 mm. Male. Head black in ground-colour, with brown to black setation, occiput finely greyish pollinose. Dichoptic, with upper ommatidia enlarged. Frons represented by small triangular space just above antennae, bare, greyish brown pollinose. Ocellar triangle very prominent, with 2 pairs of thin setae; anterior ocellars moderately long, proclinate and lateroclinate, posterior ocellars short. Postvertical and postocular setae rather short, thin; additionally occiput covered with numerous similar setae in lower part. Antenna black; scape short, subequal to globular pedicel, both with short setae; postpedicel rather short, nearly 2.5 times longer than wide, broad basally, strongly tapered; stylus very short, bristle-tipped; segment 9 slightly longer than wide, apical bristles about as long as segment 9. Proboscis short, projected oblique; labium about half height of head; palpus projected parallel to labrum, somewhat shorter than labrum.

Thorax black in ground-colour, with black setation; scutum viewed dorsally dull brown, viewed anteriorly more distinctly brown pollinose; pleura uniformly greyish pollinose. Proepisternum with several brownish hair-like setae in lower and upper parts. Postpronotal lobe with 1 long and several short setae. Mesonotal bristles prominent; acr short, arranged in 2 close irregular rows, lacking on prescutellar depression; dc uniserial, offset from row anteriorly, in anterior part somewhat longer than acr, 2 prescutellar pairs long; 1 presut spal, 2 npl (with 3 additional thinner and paler setae), 1 short psut spal, 1 pal, 5–6 pairs of sctl.

Legs entirely brownish, unmodified, finely greyish pollinose. Coxae and trochanters with ordinary bristly hairs. Fore and mid femora with short posteroventral (longer and slightly stronger on mid femur) and similar dorsal setae. Hind femur with moderately long anteroventral and dorsal setae. Tibiae lacking prominent setae. Tarsomere 5 on all legs flattened; pulvilli broad, shorter than tarsal claw.

Wing ( Fig. 2B) finely brownish infuscate, with brownish veins; no bristle at wing base; stigma distinct brownish, elliptical, overlapping apex of R 1; anal lobe very prominent, acute. R 2+3 straight in apical part; radial fork V-shaped, with base proximal apex of R 2+3; R 5 and M 1 somewhat divergent before wing-apex; cell d broad, longer than basal cells, produced apically; m-m crossvein long, M branches widely separated; dm-cu crossvein slightly concave. Apex of cell cua slightly round, CuP+CuA long, ending just short of wing margin. Halter brown (sometimes stem paler).

Abdomen dark brown; viewed dorsally and laterally dull, finely greyish brown pollinose; viewed posteriorly velvety brown; covered with moderately long, brownish bristly hairs. Terminalia concolorous with abdomen, small. Hypandrium strongly rounded, broadly rounded apically, not produced; gonocoxal apodeme short and slender. Postgonite similar length as phallus, strongly bent apically with setose apex. Epandrium not greatly inflated laterally; dorsal bridge very narrow; produced distally into short, slender surstylus projecting obliquely medially. Phallus short and slender, strongly arched apically with rounded apex ( Fig. 8D); ejaculatory apodeme plate-like, rounded, slightly longer than gonocoxal apodeme; base of phallus produced posteriorly into slender lobe, strongly arched with rounded apex. Cercus short quadrate, one-quarter length of epandrium, apex rounded; hypoproct produced into pair of very short, slender lobes, projecting free from cercus.

Female. Head with stronger setation; occiput, ocellar tubercle and frons finely brownish grey pollinose. Dichoptic, ommatidia equally small. Frons very broad, with marginal setulae. Scutum more distinctly greyish pollinose. Femora (especially fore and mid femora) with shorter bristles. Abdomen subshining from any view, with very short setae; cercus brown, elongate.

Etymology. The specific name is from the Latin pumilus (dwarfish, diminutive), in reference to the small size of this species.

Distribution. This species has a Beringian distribution, known mainly from Alaska, northern Yukon Territory, eastern Siberia and north part of the Russian Far East ( Figs. 5A, 12A), but with a record from the extreme north of European Russia (Nenets Autonomous Okrug of Arkhangelsk Prov.).