Pseudolycoriella nigrofemoralis Mohrig, Kauschke & Broadley, 2019

Mohrig, Werner, Kauschke, Ellen & Broadley, Adam, 2019, Revision of black fungus gnat species (Diptera, Sciaridae) described from the Hawaiian Islands by D. E. Hardy and W. A. Steffan, and a contribution to the knowledge of the sciarid fauna of the Galápagos Islands, Zootaxa 4590 (4), pp. 401-439 : 423-425

Pseudolycoriella nigrofemoralis Mohrig, Kauschke & Broadley sp. n.

( Fig. 16 A – D )

Type locality: Hawaiian Islands, O‘ahu, Mānoa, Honolulu, 21.304 N 157.823 W.

Holotype: Male, 10–15.i.2018, 70 masl, UV light trap, leg. CPDT Gillett ( BPBM).

Paratypes: 13 males, 9 females, same data as holotype (3 males, 1 female in PWMP, 2 males, 2 females in BPBM, 3 males, 3 females in UHIM, 3 males, 2 females in PABM, 2 males, 1 female in ANIC) .

Description. Male. Head: Ovoid, mouthparts short; eye bridge 3-4 facets wide; antenna short, dark brown; 4 th flagellomere with a l/w index of 1.5, with surface somewhat rough, hairs as long as the diameter of the basal node, necks whitish, somewhat bicoloured; palpus 3-segmented; long, basal segment with 3-4 bristles and a patch of short sensillae. Thorax: Dark brown; scutum with long dorsocentral and lateral hairs; scutellum with 4 long posterior hairs; postpronotum bare. Wing brownish, with distinct veins; R 1 = 3/4 R; R 5 with dorsal macrotrichia; C somewhat longer than w; y = x, bare; posterior wing veins without macrotrichia. Haltere short, with darkened knobs; legs yellowish-brownish, femora of p 3 brown; fore tibia at the inner apex with a patch of bristles and a horseshoe-shaped border; spurs of middle and hind tibiae of the same size, brownish, as long as the diameter of the apex; claws strongly toothed. Abdomen: Hypopygium dark brown, the inner ventral margin of gonocoxites with short hairs; gonostylus robust, somewhat club-shaped, broadly rounded apically and densely haired, with 5 rather long and thin spines (arranged mostly in two pairs plus a single spine) and one or two longer whip-lash hairs; tegmen small, as long as wide, apically rounded; aedeagus rather short, with a narrow furca. Body length: 3.2 mm.

Female. Antenna very short, 4 th flagellomere with a l/w index of 1.0-1.2, neck very short; other characters as in males. Body length: 4 mm.

Comments. The species is characterized by the short flagellomeres with whitish necks, the dark thorax with long hairs on the scutum and 4 long marginal bristles on the scutellum, hind femur dark in contrast to the yellowish-brown fore and middle legs, very strongly toothed claws and a club-shaped gonostylus with 5 thin spines on the inner side and 1-2 longer whiplash hairs. A good character for distinguishing this species are the dark hind femora. The robust flagellomeres with bicoloured necks and the strongly toothed claws are similar to Pseudolycoriella skusei Mohrig, Kauschke & Broadley , described from Queensland and Norfolk Island, Australia (Mohrig et al. 2016).

Distribution. Hawaiian Islands (O‘ahu).

Figures

FIGURE 16 A–D. Pseudolycoriella nigrofemoralis sp. n. Holotype. A. Hypopygium; B. Flagellomeres 3–5; C. Palpus; D. Claw.