Camptochaeta spatula Vilkamaa & Menzel

Vilkamaa, Pekka, Hippa, Heikki & Heller, Kai, 2013, Review of the genus Camptochaeta Hippa & Vilkamaa (Diptera, Sciaridae), with the description of nine new species, Zootaxa 3636 (3), pp. 476-488 : 483-484

Camptochaeta spatula Vilkamaa & Menzel sp. n.

Figs 7 A, B

Material studied. Holotype male. GERMANY, Rp, Kreis Mainz-Bingen, Bacharach, Ortsteil Steeg, Sophie Cave, hand collection, 20.VIII.1993, D. Weber (in SDEI). Paratypes. 1 male, Rp, Rhein-Hunsrück-Kreis, Altlay, Barbarasegen Cave 44, hand collection, 16.V.1992, D. Weber (in SDEI), 1 male, Rp, LK Pirmasens, Lemberg, Rabenfelsdach 7, pitfall trap, 18.IV.1999, D. Weber (in SDEI), 1 male, LK Pirmasens (east of town), Felsentor Cave, pitfall trap, 7.V.1994, D. Weber (in SDEI), 1 male, Rp, Roosfelsklause, entrance, 4.VIII.1995, D. Weber (in SDEI), 1 male, SWEDEN, Sk, Skåne, Klippans, Skäralid, valley below northern Lierna, Malaise trap, 6.VIII.2004, Swedish Malaise Trap Project (in SMNH), 1 male, same data but 8.IX.2004 (in SMNH).

Description. Male. Head. Brown, antenna paler brown, maxillary palpus very pale brown. Eye bridge 2–3 facets wide. Face with 4–6 scattered longer and shorter setae. Clypeus non-setose or with 1 seta. Maxillary palpus with 3 palpomeres; palpomere 1 longer than palpomere 3, palpomere 2 shortest; palpomere 1 with 1 long sharp seta, with a dorsal pit of sensilla; palpomere 2 with 1 long sharp seta and 5–7 shorter truncate setae, palpomere 3 with 8–10 short truncate setae. Body of antennal flagellomere 4 3– 4 x as long as broad, the neck as long as or longer than wide, the longest setae longer than the width of flagellomere. Thorax. Brown, setae dark. Anterior pronotum with 4–7 setae. Episternum 1 with 5–7 setae. Wing. Length 1.9–2.66 mm. Width/length 0.35–0.40. R1/R 0.60–01.20. c/ w 0.70 –0.80. r-m and bM variable in length, r-m/bM 0.70–1.20, r-m with 2 dorsal setae, bM nonsetose. Halter pale brown. Legs. Pale yellowish brown. Coxal setae pale. Front tibial organ in depression with vestiture in patch. Front tibial spur slightly longer than the tibial width. Abdomen. Pale brown, setae dark and long and slender. Hypopygium, Figs 7 A, B. Brown, concolorous with abdomen. Gonocoxa longer than gonostylus. Gonostylus with the mesial side impressed; apicomesially with a few elongated setae; with a slender apical tooth, with 2 apical megasetae, with 2 mesial megasetae, the mesial megasetae slightly larger than the apical ones, all relatively short and nearly straight; with a flagellate seta at the basalmost mesial megaseta. Tegmen as long as broad, with roundish basolateral sides, unsclerotized.

Discussion. Camptochaeta spatula can be distinguished from other species of Camptochaeta in having two mesial megasetae on the gonostylus that are short and slender, about the same size as the apical megasetae. Furthermore, the apical tooth is small and the tegmen is unique in shape, basolaterally widened and completely unsclerotized.

Etymology. The name is Latin, spatula , referring to the spadelike tegmen of the hypopygium.

Figures

FIGURE 7. Camptochaeta spatula sp. n. (holotype). A. Part of hypopygium, ventral view. B. Gonostylus, ventral view. Scale 0.10 mm.