Claustropyga subcorticis (Mohrig & Krivosheina)

Vilkamaa, Pekka & Hippa, Heikki, 2007, Review of the Nearctic Claustropyga Hippa, Vilkamaa & Mohrig (Diptera, Sciaridae) with the description of three new species, Zootaxa 1552, pp. 53-68 : 65

Claustropyga subcorticis (Mohrig & Krivosheina)

Fig. 3 C, D

Corynoptera subcorticis Mohrig & Krivosheina, 1985: 434 .

Claustropyga subcorticis, Hippa, Vilkamaa & Mohrig, 2003: 507 .

New records. CANADA, Yukon Territory, North Fork Crossing, Mi. 43, Peel Plt.rd., 3400’, 4.VII.1962, P.J. Skitsko, 2 males (CNC), North Fork Pass, Ogilvie Mts., 4100’, 21.VI.1962, P.J. Skitsko, 1 male (CNC).

Discussion. This species which was described from the Yamal Peninsula, Russia, is also known from Chukchi Autonomous Region in Russia, Finland, Sweden and USA, Alaska ( Hippa, Vilkamaa & Mohrig 2003), the latter record consisting of 6 males. The species is easily distinguished from all other Nearctic species by its unusually modified gonostylus, which has, in ventral view, a flattened apical and a convex basal part. The flattened apical part is about one-third of the gonostylar length, and bears the apical tooth and 4–5 megasetae in rather variable positions in the different specimens. The convex part of the gonostylus bears very long setae which are nearly as long as the gonostylus is broad.

Figures

FIGURE 3. Part of hypopygium (A, C) and gonostylus (B, D) in ventral view. A and B: Claustropyga auriculata Hippa, Vilkamaa & Mohrig (from Alaska). C and D: C. subcortici s Mohrig & Krivosheina (from Alaska). Scale 0.10 mm.