Claustropyga subbrevichaeta, Mohrig, Werner & Kauschke, Ellen, 2017

Mohrig, Werner & Kauschke, Ellen, 2017, New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part III. Genera Camptochaeta Hippa & Vilkamaa, Claustropyga Hippa, Vilkamaa & Mohrig and Dichopygina Vilkamaa, Hippa & Komarova, Zootaxa 4258 (4), pp. 301-326 : 320

Claustropyga subbrevichaeta sp. n.

Fig. 9 A‒B; plate IV, fig. VIII

Locus typicus: USA, California, Los Angeles County, Topanga National Forest . Holotype: Male , 19.‒24.xii.1996, leg. W. Mohrig, yellow trap ( PWMP) . Paratypes: 1 male, same data ; 1 male, 25.‒26.xii.1994, California, Big Sur, Redwood National Park, caught by net, leg. W. Mohrig, ( PWMP) ; 1 male, 13.x.‒12.xi.2015, Oregon, Benton Co., 6.4 mi up Woods Crk Rd from jct Hwy 20, across old road, fir/alder/maple, Malaise trap, leg. S. Fitzgerald ( MZH) .

Description. Male. Head. Eye bridge 3 facets wide; antennae brown; 4th flagellomere with l/w-index of 2.0, haired as long as diameter, neck rather long. Palpus are 2-segmented, first segment with one bristle and a flat sensory area. Thorax is brown, coxae and femora paler. Scutum is haired rather strong and dark; scutellum with two longer bristles; posterior pronotum bare. Wings brownish; R1 = 3/4 R; c = 2/3 w; y = x; y without macrotrichia; posterior wing veins distinct, without macrotrichia. Haltere are rather short, brownish. Coxae, femora and tibiae brownish; tibial organ small with a patch of dark bristles, weakly bordered; spurs of middle and hind tibiae are equally long, hardly longer than the apex of tibia wide; claws are toothless. Abdomen. Ventral base of hypopygium nearly closed; gonocoxites short and strong, haired short and sparsely at the inner ventral margin; gonostylus strong, haired very short at the outside, weakly concaved at the dorsal inner side; with a short, dark apical tooth and 4 hyaline spines at the inner side. Tegmen has tooth-like shoulders, fine teeth and a rather long aedeagus. Body length: 2.5 mm.

Comments. The species is characterized by a closed ventral base of the hypopygium, gonostylus which are haired very short at the outside, having a short apical tooth and 4 hyaline spines at the inner side as well as 2- segmented palpus. The species is similar to Cl. brevichaeta Mohrig & Antonova, 1978 and Cl. sp. 1 Hippa & Vilkamaa, 2016. It differs from Cl. brevichaeta Mohrig & Antonova, 1978 by smaller gonostylus, having 4 spines only and less dense hairs at the ventral base of the hypopygium as well as a broader apex of the tegmen. It differs from Cl. sp. 1 Hippa & Vilkamaa, 2016 mainly by the shape of tegmen, having sharp lateral angles and short curved hairs at the outside of gonostylus. Claustropyga subbrevichaeta sp. n. resembles most Cl. simplicis Hippa, Vilkamaa & Mohrig, 2003 . The new species can be distinguished from Cl. simplicis by gonostylus which are more elongated and more strongly narrowed towards the apex as well as by the tegmen which has a broader medial process and sharper apicolateral corners. See also under Claustropyga postbrevichaeta sp. n.

Distribution. USA (California, Oregon).

Figures

FIGURE 9. Claustropyga subbrevichaeta sp. n. Male. Holotype. A. Part of hypopygium. B. Gonostylus.