Corynoptera bocheri, 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 : 354-355

Corynoptera bocheri sp. n.

Fig. 7 A, B

Material studied. Holotype male. CANADA, Quebec, Kuujjuarapik , window trap, 13–27.VII.1990, S. Koponen (in MZH) . Paratypes. SW GREENLAND, Paamiut, Aasivik, 61.994444°N, 49.66667°W, 13.VII.1997, J. Böcher, 11 males (in ZMUC) ; SW GREENLAND, Söndre Stromfjord , 2.VIII.1992, J. Böcher, 2 males (in ZMUC) ; SW GREENLAND, Disko Bugt, Qegertasussuk, 68°35’N, 51°05’W, 11.8.1987, J. Böcher, 1 male (in ZMUC) ; same data but 16.VIII.1987, 3 males (in MZH) ; SW GREENLAND, Taserarssuk, Torssukatak, 28.VII.1949, Chr. Vibe, 1 male (in ZMUC) ; W GREENLAND, Godthåbsfjord , 21.VII.1997, J. Böcher, 2 males (in SDEI) ; Godthåbsfjord, Austmannadalen, 64°13’N, 49°40’W, 11.VIII.1999, J. Böcher, 1 male (in ZMUC); E GREENLAND, Jameson Land, Lollants Elv, 70°54’N, 24°10’W, 8.VIII.1994, J. Böcher, 1 male (in SDEI) ; S GREENLAND, Narsarsuak , 61.162048°N, 45.414388°W, 12.VIII.1991, J. Böcher, 3 males (in MZH) ; same data but 19.VIII.1991, 1 male (in ZMUC) ; S GREENLAND, Unartok , 3.VII.1948, Chr. Vibe, 1 male (in MZH) .

Description. Male. Head. Brown, maxillary palpus pale brown, antenna concolorous with face. Eye bridge 2– 3 facets wide. Face with 2–11 scattered dark and long setae. Clypeus with 1–2 dark setae. Maxillary palpus with 3 segments; 1 st segment longer than 3rd segment, 2nd segment shortest; 1 st segment with 1–2 sharp setae, with a dorsal patch of sensilla. Body of 4th antennal flagellomere 1.65–2.10x as long as wide, the neck slightly shorter than the width of flagellomere, the longest setae as long as the width of flagellomere. Thorax. Unicolorous brown, setae dark. Anterior pronotum with 2–9 setae. Proepisternum with 6–10 setae. Scutellum with 2 long and many short setae. Wing. Fumose. Length 1.3–1.6 mm. Width/length 0.45. Anal lobe small. Veins distinct. stM longer than fork of M. R1/R 0.55–0.70. c/w 0.60–0.70. r-m longer than bM. bM and r-m non-setose. Halter pale brown. Legs. Pale brown, setae dark. Coxae strong. Fore tibial organ with dark and strong vestiture in small patch in shallow depression. Fore tibial spur longer than the tibial width. Abdomen. Pale brown, slightly paler than thorax, setae dark and strong and long. Hypopygium ( Fig. 7 A ). Pale brown, as abdomen. Gonocoxa strong, longer than gonostylus. The ventral setosity of gonocoxa dark and moderately dense, setae on the apical part of the medial margin not elongated. Gonostylus ( Fig. 7 B ) oval, its dorsoapical part excavated; without an apical tooth, with 3 megasetae; the megasetae subequal in size, strong, short and straight, with distinct basal bodies; with some elongated ventral setae. Tegmen as long as broad, apicolaterally broadened, apically hyalinous, laterally sclerotized, without a dorsal finger-like process. Aedeagal apodeme short.

Discussion. In having three very strong gonostylar megasetae with strong basal bodies and in lacking the apical tooth of the gonostylus, Corynoptera bocheri sp. n. belongs to the Corynoptera spinifera group in the sense of Menzel & Mohrig (2000), together with C. spinifera Tuomikoski, 1960 and C. uniceps ( Hippa & Vilkamaa, 1994) . All three species have one of the gonostylar megasetae at the very apex of the gonostylus. Corynoptera bocheri resembles C. spinifera in having three megasetae (four in C. uniceps ), but they are shorter, in this respect more resembling C. uniceps . However, C. bocheri has only one megaseta near the middle of the gonostylus, whereas C. uniceps has three in this position. Corynoptera bocheri and C. spinifera have an apically hyalinous and laterally broadened tegmen, whereas the tegmen of C. uniceps is more conical but apicolaterally with a peculiar flattened part.

Etymology. The species is named after the Danish entomologist, Jens Böcher, who collected most of the type material of the species.

Figures

FIGURE 7. Corynoptera bocheri sp. n. (holotype). A. Part of hypopygium, ventral. B. Gonostylus, ventral. Scale 0.10 mm.