Bradysiopsis postvittigera, Mohrig, Werner & Kauschke, Ellen, 2016

Mohrig, Werner & Kauschke, Ellen, 2016, New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part II. Genus Bradysiopsis Tuomikoski, 1960, Zootaxa 4154 (3), pp. 293-302 : 295

Bradysiopsis postvittigera sp. n.

( Fig. 1 A–C)

Locus typicus: Canada, Alberta, Munn Creek , 53. 30°N, 118.10°W, spruce forest. Holotype: Male, 11.vi.– 24.vii.1994, leg. E. Fuller, Malaise trap ( PWMP) . Paratypes: 1 male, 14.vii.1955, leg. C. P. Alexander, USA, Rocky Mountains Nat. Park, Glacier Basin ( PWMP) .

Description. Male. Head. Dark brown. Eye bridge 3 facets wide. Antennae brown, 4th flagellomere with l/windex 2.8, haired whitish and as long as wide. Palpus long, 3-segmented, basal segment with a flat sensory area and 3–4 bristles. Thorax. Brown. Scutum with very short whitish hairs and three blackish strips, paler in praescutal and lateral areas. Wings pale, R1: R = 0.7; c = 2/3 w; y = x, without macrotrichia, posterior veins distinct and bare. Haltere short, brownish. Legs brown. Tibial organ large with a patch of many dense bristles, not distinctly bordered; spurs of middle and hind tibia rather short and equally long; claws toothless. Abdomen. Brown, with sparsely and very short whitish hairs. Hypopygium brown, ventral base closed. Gonocoxites at ventral inner margin haired sparsely and short. Gonostylus at most two times longer than wide, pointed towards the apex, apical third curved; apical tooth present; 3 subapical spines and a few (2–3) longer bristles at inner side; lowest spine at larger base and slightly curved. Tegmen as high as wide, rounded, apically narrowed; aedeagus long and thin. Body size: 3 mm.

Comments. The species is characterized by long gonostylus, pointed and curved in apical half, with 3 subapical spines. The lowest spine is somewhat curved. Hypopygium has a closed ventral base. The species is similar to Br. praevittigera ( Fig. 3 ) but differs by the narrow space of the ventral base of hypopygium, three subapical spines (the lowest at a large base is slightly curved) and slender flagellomeres with longer hairs.

Distribution. USA, Canada.

Figures

FIGURE 1. Bradysiopsis postvittigera sp. n. Holotype. A. Hypopygium, ventral view. B. Gonostylus, ventral view. C. 4 th flagellomere.

FIGURE 3. Bradysiopsis praevittigera sp. n. Holotype. A. Gonostylus, ventral view. B. Flagellomeres 3 – 4. C. Wing.