Bradysiopsis praevittigera, 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 : 297-299

Bradysiopsis praevittigera sp. n.

( Fig. 3 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, same data ( PWMP) ; 1 male, 1.vi.1991, Canada, Ontario, Algonquin, leg. M. Bartak, ( SDEI) .

Description. Male. Head. Dark brown. Eye bridge 3–4 facets wide. Antennae brown, 4th flagellomere with l/ w-index 2.2, haired whitish, much shorter than the diameter. Palpus long, 3-segmented; basal segment with flat sensory area and 3–4 bristles. Thorax. Dark brown. Scutum central blackish, with paler prescutellar and lateral areas, haired whitish and very short. Wings lightly brownish, R1: R = 0.9, c = 2/3 w, y = x, without macrotrichia; rm cross vein regular, posterior veins distinct and bare. Haltere short, brownish. Legs brown, tibial organ large, with a patch of many dense bristles, not distinctly bordered; spurs at hind tibia rather short and slightly unequal long; claws toothless. Abdomen. Brown, haired whitish and very short. Hypopygium brown, ventral base somewhat vshaped, not broadly closed; inner ventral margin of gonocoxites with short hairs. Gonostylus more than two times longer as wide, pointed towards apex and curved in the apical third, with apical tooth, 2 subapical spines and a few (3–4) longer bristles at the apical half of the inner side. Tegmen as high as wide, rounded, apically narrowed; aedeagus rather short. Body size: 4 mm.

Comments. The species is similar to Br. postvittigera ( Fig. 1 ). It is characterized by long gonostylus, pointed and curved in the apical half, with 2 equal subapical spines. The ventral base of the hypopygium is slightly vshaped, not broadly closed; flagellomeres rather short and compact, with short hairs. Distribution. 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.