Scatopsciara (Xenopygina) itumae, Mohrig, Werner & Kauschke, Ellen, 2016

Mohrig, Werner & Kauschke, Ellen, 2016, New Black Fungus Gnats (Diptera, Sciaridae) of North America Part I. Genus Scatopsciara Edwards, 1927, Zootaxa 4150 (4), pp. 401-435 : 421

Scatopsciara (Xenopygina) itumae sp. n. *

( Fig. 18 A–C )

Locus typicus: USA, Arizona, Pimo County, Tucson Mts. 16 Km W Tucson, 30.24°N, 111.13°W, Sonora desert. Holotype: Male, 9.–30.viii.1995, leg. S. Prchal, Malaise trap ( PWMP) . Paratypes: 4 males, same data ; 2 males, 15.–30.viii.1995, 1 male, 28.ix.–7.x.1995, 1 male, 30.iv.–16.v.1995, same location, leg. S. Prchal ( PWMP, 1 male in PKHH, 1 male in MZH) .

Description. Male. Head. Eye bridge 3 facets wide. 4th flagellomere with l/w-index of 2.0, haired as long as wide, brownish; neck rather long. Palpus 3-segmented, short; basal segment without deepened sensory area and one bristle only. Thorax. Brown; scutum haired brown. Wings pale; R1 = 2/3 R; c somewhat longer ½ w; y = x, bare; posterior veins bare. Haltere short, brownish. Legs yellowish-brown; tibial organ comb-like; middle and hind tibiae with long, but somewhat unequal spurs; claws toothless. Abdomen. Brown, haired brownish. Hypopygium brown, ventral base v-shaped. Gonocoxites longer than gonostylus, inner ventral margin haired short and densely. Gonostylus slender, weakly curved, without tooth but with 4 spines, two at the apex and two longer ones, positioned as pair subapically. Tegmen simple, somewhat trapezoid. Body size: 2.2 mm.

Comments. The species is well characterized by the two pairs of spines on gonostylus. It might however be mistaken with small species of Bradysia , where spurs of the middle and hind tibiae are slightly different in length. Short palpus, short R1 and a small tibial organ support strongly its inclusion in the genus Scatopsciara however. The species is similar to Sc. subitumae . The species belongs to the Sc. inesae group.

Distribution. USA (Arizona).

*Ituma = white stone, Choktaw.

Figures

FIGURE 18. A – C. Scatopsciara (Xe.) itumae sp. n. Holotype. A. Hypopygium, ventral view. B. 4 th flagellomere. C. Apex of fore tibia. D – E. Scatopsciara subitumae sp. n. Holotype. D. Part of hypopygium. E. Flagellomeres 4 – 5.