Claustropyga aperta Hippa, Vilkamaa & Mohrig

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 : 56

Claustropyga aperta Hippa, Vilkamaa & Mohrig

Fig. 2 C–F

Claustropyga aperta Hippa, Vilkamaa & Mohrig, 2003: 487 .

New records. CANADA, British Columbia, Vancouver Island, Upper Carmanah Valley, forest floor, Malaise trap, 21.VI.–3.VII.1991, N. Winchester, 1 male (RBCM), same data but 28.VIII.–9.IX.1991, 1 male (CNC), same data but 17.–26.X.1991, 1 male (CNC).

Discussion. Claustropyga aperta was previously known only from the holotype male and 4 paratype males found at high altitudes (3200–3400 m) in Austria. The hypopygia in the specimens from Vancouver Island ( Fig. 2 E) seem very similar to that of the holotype except for the tegmen, which has the posterior margin medially less produced, and the lateral sides, which are less strongly concave than in the holotype; the tegmen of the holotype resembles in this respect C. simplicis , Fig. 2 A. One of the specimens from Vancouver Island differs from the other two as well as from the types by having three-segmented maxillary palps instead of two-segmented ones. Variation in the number of palpomeres occurs also in many other Claustropyga ( Hippa, Vilkamaa & Mohrig 2003) . Although we have some doubts, we regard the British Columbia specimens as conspecific with the European ones.

Figures

FIGURE 2. Part of hypopygium (A, E) and gonostylus (B, F) in ventral view, and maxillary palpus in mesial (C) and in apico-dorsal (D) view. A and B: Claustropyga simplicis Hippa, Vilkamaa & Mohrig (from British Columbia). C – F: C. aperta Hippa, Vilkamaa & Mohrig (from British Columbia). Scale 0.10 mm.