Bradysiopsis praevittata, 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 : 295-297

Bradysiopsis praevittata sp. n.

( Fig. 2 A–D)

Locus typicus: USA, California, Los Angeles County, San Bernardino Mountains , Summit valley , Chaparral. Holotype: Male, 24.–28.ii.1996, leg. W. Mohrig, yellow trap ( PWMP) . Paratypes: 5 males, 2 females, 6.i.1995, Los Angeles City, Griffith Park, caught by net; 2 males, 27.ii.1996, California, Orange County, Santa Ana Mountains , Santiago Canyon, Irvine Lake , caught by net; 1 male, 25.–26.xii.1994 , California, Big Sur, Redwood National Park, caught by net; 3 males, 26.ii.–4.iii. 1996 , 1 male, 17.–22.ii.1996, Los Angeles County, San Bernardino Mountains, Lake Gregory Village , yellow traps ; 3 males, 1 female, 24.–28.ii.1996, Los Angeles County, San Bernardino Mountains, Summit Valley , Chaparral, yellow traps ; 1 male, 2.–16.iii.1997, Los Angeles County, San Bernardino Nat. Park, Silverwood Lake , 1200 m, Malaise trap ; 5 males, 29.ii.1996, USA, California, Los Angeles County, San Gabriel Mountains , San Gabriel Canyon, 800 m, caught by net ; 3 males 1 female, 4.– 9.iii.1996, same location, leg. W. Mohrig ( PWMP, 1 male in PKHH, 1 male in MZH, 1 male in SDEI, 1 male in CAS, 1 male in CUIC).

Description. Male. Head. Dark brown. Eye bridge 3–4 facets wide. Antennae brown, 4th flagellomere with l/ w-index 2.8, haired whitish, dense and as long as wide. Palpus long, 3-segmented, basal segment with a flat sensory area and 3–4 bristles. Thorax. Brown. Scutum with three blackish strips and paler prescutellar as well as lateral areas, haired whitish and very short. Wings lightly brownish, R1: R = 0.7, c longer 1/2 w, y = x, without macrotrichia; r-m cross vein regular, posterior veins distinct and bare. Haltere short, brownish. Legs brown, paler than thorax, tibial organ large, with a patch of many dense bristles, not distinctly bordered; spurs of middle and hind tibia rather short and slightly unequal long; claws toothless. Abdomen. Brown; haired whitish, very short and sparsely. Hypopygium brown, ventral base broadly v-shaped; gonocoxites haired short and sparsely at ventral inner margin. Gonostylus short and compact, at most two times longer than wide, not pointed towards apex, with apical tooth and 7–8 subapical spines; without longer bristles at inner side. Tegmen wider than high, rounded; aedeagus rather short and strong. Body size: 3 mm.

Comments. Species is characterized by short and compact gonostylus, not pointed towards apex, with 7–8 subapical spines and a broad v-shaped ventral base of hypopygium. It is similar to Br. vittata ( Fig. 5 ) but differs by shorter and broader gonostylus, somewhat longer flagellomeres and paler legs. Length and thickness of gonostylus varied somewhat among the specimens.

Distribution. USA, Canada.

Figures

FIGURE 2. Bradysiopsis praevittata sp. n. Holotype. A. Part of the hypopygium, ventral view. B. Gonostylus (400 x). C. 4 th flagellomere. D. Apex of fore tibia.

FIGURE 5. Bradysiopsis vittata (Meigen). Specimen from California. A. Part of the hypopygium, ventral view. B. 4 th flagellomere.