Siphunculina bulbifera, Liu, Xiao-Yan, Nartshuk, Emilia P. & Yang, Ding, 2017

Liu, Xiao-Yan, Nartshuk, Emilia P. & Yang, Ding, 2017, Three new species and one new record of the genus Siphunculina from China (Diptera, Chloropidae), ZooKeys 687, pp. 73-88 : 74

Siphunculina bulbifera sp. n. Figs 1-2, 3-6

Diagnosis.

Ocellar triangle smooth, shiny, reaching anterior margin of frons, with pointed apex. Scutellum with two pairs of scutellar setae on small tubercles. Cephalic and thoracic setae and setulae black. Notopleurals 1+1. Distal 2/3 of gonite long globose.

Description.

Holotype. Male. Body length 2.2 mm, wing length 1.6 mm.

Head black, 0.8 times as long as high in profile, as wide as thorax; face somewhat concave in lateral view, facial carina distinct, broad; frons as long as wide, projecting slightly in front of eye; gena broad, 0.5 times as wide as first flagellomere; parafacial linear; vibrissal angle distinctly produced beyond eye by subequal length to gena-width. Ocellar triangle smooth, shiny, reaching anterior margin of frons, with pointed apex; ocellar tubercle black. Cephalic setae and setulae black. Antenna yellow except for distodorsal 1/2 of first flagellomere brown, with thick grayish microtomentum; first flagellomere 0.6 times as long as wide; arista black except for basal segment yellow, with short pubescence. Proboscis brown to yellow with yellow setulae; palpus brown to yellow with yellow setulae.

Thorax black with gray microtomentum, evenly covered with short setulae. Scutum as long as wide. Thoracic pleuron shiny black. Scutellum 0.55 times as long as wide; two pairs of scutellar setae on small tubercles; apical scutellar seta short, 0.3 times as long as scutellum. Setae and setulae on thorax black; notopleurals 1+1, developed. Legs brown except for basal portion and distal 1/3 of fore tibia, both ends of mid and hind tibiae, fore and hind tarsomeres 1, mid tarsomeres 1-2 yellow. Setulae on legs brown. Wing 2.3 times as long as wide, hyaline; veins yellowish brown. Relative lengths of 2nd: 3rd: 4th costal sections = 5: 10: 3; cross-veins r-m and dm-cu not approximated, r-m at basal 0.65 of discal medial cell. Halter brown.

Abdomen shiny brown except for tergite 1 yellow with brown distally; venter yellow. Setulae on abdomen black.

Male genitalia (Figs 3-6): Epandrium blackish brown with long brown setulae; surstylus distinctly shorter than epandrium in lateral view. Cercus short and broad, with moderately concave ventral margin in dorsal view. Pre- and postgonites fused, basal 1/3 narrow, distal 2/3 long globose; basiphallus longer than wide, cylindrical; distiphallus short, membranous; phallapodeme long, with basal stalk narrow in lateral view. Hypandrium broad, with two basal rounded projections, arms free and short, apex with internal projection long, external projection short.

Female. Unknown.

Type material.

Holotype, ♂, China: Beijing: Shidu, 1-2. VI. 2009, leg. Dan Zhou (photographed and genitalia prepared). Paratype, 2 ♂♂, same locality as holotype, 1-2. VII. 2009, leg. Jinjing Wang (in 75% alcohol, deposited in CAU).

Distribution.

China (Beijing).

Remarks.

The new species is somewhat similar to S. nitidissima Kanmiya, but can be separated from the latter by the following features: ocellar triangle smooth without median groove, two pairs of scutellar setae on small tubercles, and gonite has narrow base, its distal 2/3 long and globose; in S. nitidissima , the ocellar triangle has a median groove, the scutellum has three pairs of scutellar setae on small tubercles, and the gonite is finger-like ( Kanmiya 1982).

Etymology.

The specific name is from the Latin bulbifera ( “bulbiform”), referring to the shape of gonite.