Corynoptera cracentis, Vilkamaa, Pekka, Hippa, Heikki & Heller, Kai, 2013

Vilkamaa, Pekka, Hippa, Heikki & Heller, Kai, 2013, Notes on the taxonomy of the Holarctic Corynoptera Winnertz sensu lato (Diptera, Sciaridae), with description of six new species, Zootaxa 3710 (4), pp. 322-332 : 324-325

Corynoptera cracentis sp. n.

Figs 2 A, B

Material studied. Holotype male. FINLAND, Tervola, Törmävaara (UTM grid 7339083:3395470), 60 m, by a spring, Malaise trap, 1–28.VIII.2004, J. Salmela (MZH). Paratypes. FINLAND, Ks, Kalliojoki (UTM grid 7344909:3610594), by a brook, Malaise trap, 1–20.IX.2005, J. Salmela (1♂ MZH, 1♂ SDEI); Ks, Juhtipuro (UTM grid 7361582:3614336), by a brook, Malaise trap, 1–20.IX.2005, J. Salmela (1♂ MZH); USA, Nevada, White Pine County, Indian Burial Cave, by hand, 3.III.2007, S.J. Taylor & J.K. Krejca (1♂ USNM); CANADA, British Columbia, Vancouver Island, Courtenay, VI.1965, N.L.H. Krauss (1♂ USNM).

Description. Male. Head. Pale brown. Maxillary palpus very pale brown. Antenna concolorous with face. Eye bridge 2–3 facets wide. Face with 9–11 scattered pale longer and shorter setae. Clypeus with 1–2 pale setae. Maxillary palpus with 3 segments, segment 3 longer than segment 1; segment 2 shortest, segment 1 with 1 long sharp seta and a patch of sensilla, segment 2 with 1 sharp seta and 5–6 shorter truncate setae; segment 3 with 6–8 short truncate setae. Antennal flagellomere 4 3.1–3.4x as long as wide, the neck shorter than broad; longest setae longer than the width of flagellomere. Thorax. Unicolorous pale brown. Setae pale. Anterior pronotum with 2 setae. Prothoracic episternum with 5–6 setae. Scutellum with 2 long setae. Wing. Length 1.6–2.0 mm. Width/ length 0.40. R1/R 0.60–0.85. c/ w 0.70 –0.75. r-m non-setose or with 1 seta. bM non-setose. Haltere pale brown. Legs. Yellow. Front tibial organ with pale vestiture, forming a small demarcated patch. Front tibial spur slightly longer than the tibial width. Abdomen. Brown, paler than thorax. Setae pale. Hypopygium, Figs 2 A, B. Pale brown, as abdomen. Gonocoxa narrow, longer than gonostylus; ventral setosity sparse, setae at the apical part of the mesial margin not elongated. Gonostylus much elongated, mesial side slightly impressed; setosity sparse, apicomesially with a few elongated setae; bearing an apical tooth, with 2 megasetae (subequal in size, curved, longer than apical tooth). Tegmen unmodified, without a dorsal finger-like process.

Discussion. The gonostylus of Corynoptera cracentis is slightly reminiscent of C. subpiniphila Mohrig & Mamaev, 1992 (see Hippa et al. 2010: Fig. 77) in the arrangement of the megasetae just near the apical tooth, but the gonostylus of C. cracentis is much narrower; has only two, not three, megasetae, and lacks any elongate mesial setae on the gonocoxa. Corynoptera cracentis also somewhat resembles C. comitessa Rudzinski, 2008 from Taiwan, but has a much narrower and longer gonostylus, and the megasetae curved and side by side basal of the apical tooth, rather than curved and on each side (mesial and lateral) of the of the apical tooth as found in the latter. Corynoptera cracentis resembles also the Nearctic C. pilata (Pettey, 1918) and C. subtrivialis (Pettey, 1918) but the two latter have a thicker gonostylus with megasetae in a row, not overlapping in ventral view.

Etymology. The name is Latin, cracens (slender), referring to the narrow gonostylus of the species.

Figures

FIGURE 2. Corynoptera cracentis sp. n. (holotype). A. Part of hypopygium, ventral. B. Gonostylus, ventral. Scale 0.10 mm.