Claustropyga postbrevichaeta, 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 : 318-319

Claustropyga postbrevichaeta sp. n.

Fig. 8 A‒B; plate IV, fig. VII

Locus typicus: Canada, Alberta, Berland River at Hwy 40, 53.42° N, 118.20° W, pine forest. Holotype: Male , 30.iv.‒11.vi.1994, leg. E. Fuller, Malaise trap ( PWMP) . Paratype: 1 male, same data ( PWMP) .

Description. Male. Head. Eye bridge 3‒4 facets wide; antennae brown; 4th flagellomere with l/w-index of 2.0, haired as long as diameter, neck rather short. Palpus short, 3-segmented, first segment with 1‒2 bristles and a flat sensory area. Thorax. Brown. Scutum is haired rather long and dark; scutellum with two longer bristles; posterior pronotum bare. Wings brownish; R1 = 3/4 R; c = 2/3 w; y shorter x; y without macrotrichia; posterior wing veins distinct, without macrotrichia. Haltere are rather long, brownish. Coxae, femora and tibiae brown; tibial organ small, with a few dark bristles, not distinctly bordered; spurs of middle and hind tibiae equally long, hardly longer than the apex of tibia wide; claws toothless. Abdomen. Hypopygium basely closed, haired short and densely; gonocoxites rather long and strong, haired short and sparsely at the inner ventral margin; gonostylus strong, haired very short at the outside, winged in the basal half of the dorsal side; with a short and rather thin, dark apical tooth and 6‒8 short, thin hyaline spines at the inner side. Tegmen with rounded shoulders, fine teeth and a rather long aedeagus. Body length: 2.8 mm.

Comments. The species is characterized by a closed base of the hypopygium, gonostylus which are haired very short at the outside, having a short apical tooth and 6‒8 fine, hyaline spines at the inner side as well as 3- segmented palpus. It is similar to Cl. clavulata Hippa & Vilkamaa, 2016 and Cl. subbrevichaeta sp. n. It differs from Cl. clavulata Hippa & Vilkamaa, 2016 by spines which occur all along the inner side of gonostylus, a closed and haired ventral base of the hypopygium as well as a strongly shouldered tegmen. It differs from Cl. subbrevichaeta sp. n. by numerous shorter subapical spines and 3-segmented palpus.

Distribution. Canada (Alberta).

PLATE IV. Figure VII Hypopygium of Claustropyga postbrevichaeta sp. n.; Figure VIII Hypopygium of Claustropyga subbrevichaeta sp. n.

Figures

FIGURE 8. Claustropyga postbrevichaeta sp. n. Male. Holotype. A. Hypopygium. B. Gonostylus.