Corynoptera hystricina, Vilkamaa & Menzel, 2017

Vilkamaa, Pekka & Menzel, Frank, 2017, Descriptions of new species of the genera Camptochaeta Hippa & Vilkamaa and Corynoptera Winnertz (Diptera, Sciaridae) from the Holarctic, Zootaxa 4353 (2), pp. 347-359 : 357

Corynoptera hystricina sp. n.

Fig. 9 A, B

Material studied. Holotype male. RUSSIA, Krasnoyarsk region, Taimyr Peninsula, 12.5 km S of Dixon, 73°24’N, 80°39’E, on the river Lemberova , pan trap, 7–10.VII.2012, A. V. Barkalov (in ISEA). Paratypes . Same data as holotype, 4 males (2 in MZH, 2 in SDEI).

Description. Male. Head. Brown, maxillary palpus pale brown, antenna concolorous with face. Eye bridge 2 facets wide. Face with 8–12 scattered dark and long setae. Clypeus with 2–3 dark setae. Maxillary palpus with 3 segments; 1 st segment longer than 3rd segment, 2nd segment shortest; 1 st segment with 2–4 sharp setae, with a dorsal pit of sensilla. Body of 4th antennal flagellomere 1.75–2.15x as long as wide, the neck shorter than the width of flagellomere, the longest setae shorter than the width of flagellomere. Thorax. Unicolorous dark brown, setae dark. Anterior pronotum with 2–3 setae. Proepisternum with 6–10 setae. Wing. Fumose. Length 1.9–2.1 mm. Width/length 0.40–0.45. Anal lobe small. Veins distinct. R1/R 1.00–1.10. c/w 0.65–0.70. bM longer than r-m. bM non-setose, r-m non-setose or with 1 seta. Halter pale brown. Legs. Brown, setae dark. Coxae strong. Fore tibial organ with dark, strong and sparse vestiture in large sparse patch. Fore tibial spur longer than width of tibia. Abdomen. Brown, slightly paler than thorax, setae dark and strong. Hypopygium ( Fig. 9 A ). Brown, as abdomen. Gonocoxa strong, much longer than gonostylus. The ventral setosity of gonocoxa dark and strong, setae in a slightly denser group and slightly longer on the basal part of medial margin. Gonostylus ( Fig. 9 B ) elongated, medially and laterally curved, slightly constricted at apical fourth, the medial side not impressed; with a strong straight apical tooth, with 7–10 subapical megasetae of subequal size, shorter than apical tooth, straight or slightly curved. Tegmen shorter than broad, apically truncate, laterally roundish, weakly sclerotized, without a dorsal finger-like process, with a small area of aedeagal teeth. Aedeagal apodeme short.

Discussion. With its both medially and laterally curved gonostylus with many megasetae and with its gonocoxa with dark and strong setosity, Corynoptera hystricina is not especially similar to any other species of the genus. Regarding their gonostylus, Corynoptera hystricina and C. tenuichaeta (see under) resemble some species of Scatopsciara Edwards s. str. but both species have equally long spurs in their mid- and hind tibia and their tibial organ is not a short comb on a lobe-like projection, C. hystricina having its tibial organ as a short roundish patch, C. tenuichaeta having a comb of dark strong setae, typical of Corynoptera s. str. Furthermore, both species have a longer wing vein R1 than do the species of Scatopsciara (R1/R = 1.00-1.10 versus 0.70-0.95). Both species are untypical, although not unique in Corynoptera , in having a variable number of setae on their first palpal segment.

Etymology. The name is derived from the Latin word hystricis, porcupine, referring to the strong setae of the male hypopygium.

Figures

FIGURE 9. Corynoptera hystricina sp. n. (A paratype, B holotype). A. Part of hypopygium, ventral. B. Gonostylus, ventral. Scale 0.10 mm.