Claustropyga spicea, Vilkamaa, Pekka & Hippa, Heikki, 2007

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 : 63-65

Claustropyga spicea sp. n.

Fig. 6 A–F

Material studied. Holotype male. CANADA, Yukon Territory, Ogilvie Mts., North Fork Pass, 4100’, 21.VI.1962, P. J. Skitsko ( CNC).

Male. Head brown, antenna and maxillary palpus slightly paler than the other parts. Eye bridge 2–3 facets wide. Face (prefrons) with 10 setae. Clypeus with 1 seta. Antennal flagellomere 4, Fig. 6 B. Maxillary palpus, Fig. 6 A, with three palpomeres. Palpomere 1 with 1–2 setae. Palpomere 2 with 5 setae. Palpomere 3 with 5 setae. Thorax dark brown. Scutum and scutellum as in C. brevichaeta ( Hippa et al. 2003, Fig. 3 a) but the number of lateral setae on scutum ca. 20; the number of scutellar setae ca. 30. Anterior pronotum with 3 setae.

Episternum 1 with 8–10 setae. Other pleural sclerites non-setose. Wing similar to C. mirifica , Fig. 4 C, but M fork longer, its base extending to the level of the tip of R1; pale yellowish-brown. Wing length 2.50 mm, width/length 0.4. c/ w 0.8. R1/R not calculated because the wing of the specimen studied is folded so that exact measurements cannot be taken. R-m and bM approximately equally long, both non-setose. Haltere brownish. Legs pale brown. Apex of fore tibia, Fig. 6 C. The spurs of hind tibia, Fig. 6 D, unusual in shape, with a broad basal part and narrow apical part. Length of fore basitarsomere/length of fore tibia 0.5. Length of hind tibia/ length of scutum and scutellum 1.95. Abdomen pale brown. Sternite 8 with 17 setae in two transverse rows on the apical half. Hypopygium, Fig. 6 E, F. Intercoxal lobe (sternite 9) large and semicircular, without a medial gap in setosity. Gonostylus with 12–14 megasetae, the apicalmost at the apical tooth, which is as long as the longest megasetae. Tegmen with blunt lateral lobes. Hypoproct (sternite 10) difficult to observe on the slide, apparently with 1 seta on each side.

Female unknown.

Discussion. Claustropyga spicea resembles the Palaearctic C. janetscheki in the high number of gonostylar megasetae, 12 or more, but otherwise the two species are not very similar. C. spicea is at once distinguished by having a large semicircular intercoxal lobe; in C. janetscheki the intercoxal lobe is totally absent. C. spicea is not very dissimilar from C. aperta ( Figs. 2 A, E) from which it is distinguished e.g. by a higher number of gonostylar megasetae (12–14, against 9) and by lacking a medial non-setose stripe on the intercoxal lobe.

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.

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.

FIGURE 4. Claustropyga mirifica sp. n. (holotype): Antennal flagellomere 4 in ventral view (A), maxillary palpus in dorsal view (B), wing in dorsal view (C), part of hypopygium (D) and gonostylus (E) in ventral view. Scale 0.10 mm, in C 1.0 mm.

FIGURE 6. Claustropyga spicea sp. n. (holotype). Maxillary palpus in dorsal view (A), antennal flagellomere 4 in ventral view (B), apical part of fore tibia in prolateral view (C), apical part of hind tibia in retrolateral view (D), and part of hypopygium (E) and gonostylus (F) in ventral view. Scale 0.10 mm.