Pseudolycoriella nocturna, Mohrig & Kauschke, 2019

Mohrig, Werner & Kauschke, Ellen, 2019, New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part V. Genera Pseudolycoriella Menzel & Mohrig and Phytosciara Frey, Zootaxa 4543 (2), pp. 261-283 : 271

Pseudolycoriella nocturna sp. n.

( Fig. 6 A – B )

Locus typicus: Canada, Alberta, Munn Creek , 53.30°N, 118.10°W .

Holotype: Male, 11.vi.–24.vii.1994, spruce forest, Malaise trap, leg. E. Fuller, ( PWMP).

Description. Male. Head: Round; eye bridge 4–5 facets wide. Antenna brown; 2 nd flagellomere with a l/w index of 2.0, hairs pale, as long as the diameter, no deepened sensorial pits. Palpi 3-segmented, long, brown; first segment with 5–6 bristles and a flat patch of sensillae. Mouth parts rather short. Thorax: Dark brown, scutum long and densely haired. Scutellum with 4 stronger bristles. Postpronotum bare; mediotergite with a few bristles. Wing brownish; R 1 = 2/3 R; c = 1/2 w; y longer than x, x bare and y with 3–4 macrotrichia; M-fork shorter than M-stem, rather wide; CuA-stem longer than x; posterior veins distinct and without macrotrichia. Haltere brown and rather long. Legs brown; tibial organ indistinct with a few short bristles, nearly comb-like, not bordered. Claws toothless. Abdomen: Ventral base of hypopygium without lobe, inner margin of gonocoxites with rather strong but not dense hairs. Gonostylus in profile (ventro-lateral aspect) rather narrow, apex densely haired, inner side broad and somewhat spoon-like; subapically with a few (3–4) fine, hyaline spines within the hairs and a long whiplash hair, inserted subapically. Body length: 4.0 mm.

Comments. The species is characterized by having a uniformly dark brown body colour, macrotrichia on the apical part of y, a gonostylus that is broad on the inner side (spoon-like), a few bristles on the mediotergite (unusual for Pseudolycoriella ), toothless claws and a weak, somewhat comb-like tibial organ on the apex of the fore tibia. It resembles Psl. planiforceps (Steffan) , but differs by having a darker body colour, a long whiplash hair and a weakly structured tibial organ.

Distribution. Canada (Alberta).

Figures

FIGURE 6. A–B. Pseudolycoriella nocturna sp. n. Holotype. A. Part of hypopygium (tegmen deformed). B. Apex of fore tibia. C–D. Pseudolycoriella trivialis (Johannsen). Specimen from Canada. C. Part of hypopygium. D. Antennal flagellomeres 1–4.