Minettia (Plesiominettia) nigrantennata, Shi, Li, Gaimari, Stephen D. & Yang, Ding, 2015

Shi, Li, Gaimari, Stephen D. & Yang, Ding, 2015, Five new species of subgenus Plesiominettia (Diptera, Lauxaniidae, Minettia) in southern China, with a key to known species, ZooKeys 520, pp. 61-86 : 65

Taxon classification Animalia Diptera Lauxaniidae

Minettia (Plesiominettia) nigrantennata sp. n. Figs 11-15, 45

Type material.

Holotype: ♂ (CAUC), CHINA, Hunan: Changde, Shimen, Hupingshan National Nature Reserve, Zhipeng River, 450 m, 6. vi. 2008, Li Shi.

Etymology.

Latin, nigr- is from the Latin, nigra, meaning black, + antennata, meaning antenna; referring to the blackish brown antenna; feminine adjective.

Diagnosis.

Arista pubescent, rays of arista with longest setulae shorter than 1/3 height of 1st flagellomere. Mesonotum with anteriormost dorsocentral setae slightly beyond suture. Legs black, except basal tip of tibia yellow, fore tarsus brown, mid and hind tarsomeres 1-2 dark yellow and tarsomeres 3-5 brown; hind femur with a row of anteroventral seta on apical half. Male genitalia: surstylus consisting of a brown knife–like apical process and a yellow bar–like apical process with setulae in lateral view; postgonite narrow basally and broad contorted apically with 2 short setulae; phallus very broad, columnar, with a pair of inner sclerites and a row of tiny spinule, visible in dorsal view.

Description.

Male. Body length 4.6 mm, wing length 5.0 mm.

Head blackish brown. Frons with narrow yellow margin; ocellar triangle grayish black; ocellar setulae developed, slightly longer than anterior fronto-orbital setae, anterior fronto-orbital setae reclinate, shorter than posterior fronto-orbital setae. Face and parafacial dark black; gena about 1/6 height of eye. Antenna blackish brown, 1st flagellomere 1.6 times longer than high; arista black, except pale brown at base, pubescent, rays of arista with longest setulae shorter than 1/3 height of 1st flagellomere. A blackish brown spot present between eye and base of antenna. Proboscis blackish brown and palpus black.

Thorax black with dense brownish pollinosity. Mesonotum with 0+3 dorsocentral setae (anteriormost dorsocentral setae slightly beyond suture), acrostichal setulae in 6 irregular rows, prescutellar setae as long as first postsutural dorsocentral setae; 1 strong intra-alar seta, 1 anepisternal seta, 2 katepisternal setae. Scutellum black with dense brown pollinosity. Legs black, except basal tip of tibia yellow, fore tarsus brown, mid and hind tarsomeres 1-2 dark yellow and tarsomeres 3-5 brown. Fore femur with 6 posteroventral setae and 8 posterodorsal setae, fore tibia with 1 short preapical anterodorsal seta and 1 short apicoventral seta. Mid femur with 5 anterior setae and 1 apical posterior seta; mid tibia with 1 strong preapical anterodorsal seta and 1 strong apicoventral seta. Hind femur with a row of anteroventral seta on apical half, 1 short preapical anterodorsal seta and 2 apical posterior setae, hind tibia with 1 short preapical anterodorsal seta and 1 short apicoventral seta. Wing (Fig. 45) slightly dark yellow; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1) sections in proportion of 6.5:1.7:1; r-m beyond middle of discal cell; ultimate and penultimate sections of M1 in proportion of 1:1.3; ultimate section of CuA1 about 1/9 of penultimate. Halter yellow.

Abdomen blackish brown with sparse brownish pollinosity, subglossy. Male genitalia (Figs 11-15): syntergosternite 7+8 semicircular with a pair of dorsal setulae; epandrium broad with long dorsal setae in lateral view; surstylus consisting of a brown knife–like apical process and a yellow bar–like apical process with setulae in lateral view; hypandrium slightly V–shaped, hypandrial apodeme very small; postgonite narrow basally, broad and contorted apically, with 2 short setulae; phallus very broad columnar, ventral sclerite narrow apically and slightly shorter than dorsal sclerite, and medial membranous section beyond base of phallus sclerites, with a pair of inner sclerites and a row of tiny spinule, visible in dorsal view; phallapodeme short, Y–shaped, slightly projecting forward.

Female. Unknown.

Remarks.

See Minettia (Plesiominettia) tridentata sp. n.

Distribution.

China (Hunan).