Lubomyia, Šifner, 2010

Šifner, František, 2010, Two new genera and species of the family Scathophagidae (Diptera) from the Palaearctic and Oriental Regions with additional faunistic records, Acta Entomologica Musei Nationalis Pragae 50 (2), pp. 609-618 : 615-616

Genus Lubomyia gen. nov.

( Figs. 16–19 )

Type species. Lubomyia orientalis sp. nov., by present designation.

Diagnosis. This genus can be defined by the following combination of characters: palpi weakly dilated without apical bristle, flagellomere 1 wide, flagellomere 3 distinctly cylindrical, three times as long as wide, presence of only one proepisternal bristle, vein R l with seven setae in one row, and narrow and long epiphallus.

Differential diagnosis. Lubomyia gen. nov. differs from other genera by the following combination of characters: i) flagellomere 1 long and wide, reaching epistome; ii) vein R 1 with seven setae in one row; iii) epiphallus and pregonite straight and long; iv) sternites 3 and 4 of male weakly sclerotized, both without bristles or setae.

Etymology. I dedicate this genus to my fried, Czech and Canadian hymenopterologist Lubomír Masner (Invertebrate Biodiversity Agriculture and Agri-Food Canada, Ottawa, Canada). The gender is feminine.

Comment. I place this genus tentatively in the tribe Cleigastrini (cf. ŠIFNER 2003), given especially the presence of five fine setae on vein R 1 and the absence of long apical seta on the palpus.

Lubomyia orientalis sp. nov.

( Figs. 16–19 )

Type material. HOLOTYPE: J, BURMA: ‘ N.E.Burma, Kombaiti , 7000 n.[?], 9.v.1934, R. Malaise [leg.?]’ ( CNC). The holotype is fixed and pinned on a triangular plexiglass label; the abdominal segments are dissected and stored in glycerine and pinned with the specimen. Condition of specimen: bristles on thorax badly abraded, right middle leg missing. Figures are based on the holotype. This specimen was originally listed by VOCKEROTH (1977: 436) as an unnamed species from Burma placed in the genus Acerocnema .

Description. Body length 4 mm. Ground colour brown to dark brown.

HEAD. Three orbital bristles, three frontal bristles, frontal vitta, parafacials, face and genae yellow-brown, scapus and pedicellus brown; flagellomere 1 dark, long and wide, flagellomere 2 short; flagellomere 3 cylindrical, three times as long as wide; arista thickened basally, only sparsely and shortly bristled. Vibrissal callus conspicuous, with one long bristle and 3–4 short bristles. Palpi yellow, only weakly dilated, covered with short setae (visible at 80× magnification) and some short and weak bristles. Ocellar triangle and posterior portion of head dark.

THORAX. Setation consisting of very sparse acrostichal bristles, five dorsocentral bristles (3+2), one humeral bristle, one postalar bristle, two pairs of scutellar bristles of equal size, one proepisternal bristle and one katepisternal bristle. Wings with brown veins, vein R 1 with seven setae in one row, crossveins R-M and M-Cu transparent. Legs completely yellow to yellow-brown, fore femur with three anterodorsal black setae, fore and hind tibia with two rows of anterodorsal yellow setae. Hind femur with one row of posterodorsal fine bristles.

ABDOMEN. Male. Sternite 3 rectangular; sternite 4 caudally indented; lobes of sternite 5 wide and straight ( Fig. 16 ). Cerci straight, apically pointed, with very long bristles including several fine ones; surstyli straight, partially sclerotized apically, dilated and arched backwards ( Figs. 17 and 18 ). Pregonite straight, long, weakly arched apically and covered with very short and finely sclerotized setulae; postgonite straight; epiphallus narrow and long with distinct sclerotization ( Fig. 19 ). Female. Unknown.

Etymology. Orientalis (Latin, adjective), meaning eastern.

Distribution. Burma.

Figures

Figs. 16–19. Lubomyia orientalis sp. nov. 16–19 – J, holotype: 16 – abdominal sternites 3 to 5, 17–18 – cerci and surstyli (caudal and lateral views), 19 – penis apparatus with pregonites and epiphallus. Scale bars: 0.5 mm (Figs. 16–18); 0.1 mm (Fig. 19).