Siphunculina scalpriformis, 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 : 75-78

Siphunculina scalpriformis sp. n. Figs 7-8, 9-12

Diagnosis.

Ocellar triangle black with gray microtomentum except for area in front of ocelli and on both sides of ocellar tubercle shiny, reaching anterior 0.6 of frons. Scutellum with three pairs of scutellar setae. Cephalic and thoracic setae and setulae yellow. Notopleurals 1+1. Gonite knife-like, incised on basal 1/3 of each inner margin.

Description.

Holotype. Male. Body length 1.9-2.0 mm, wing length 1.5-1.6 mm.

Head black with gray microtomentum, 0.7 times as long as high in profile, as wide as thorax; face somewhat concave in lateral view, facial carina narrow; frons 0.9 times as long as wide, projecting slightly in front of eye; gena yellow except for ventral 1/3 black, broad, 0.5 times as wide as first flagellomere; parafacial linear; vibrissal angle weakly produced beyond eye. Ocellar triangle partly microtomentose, area in front of ocelli and on both sides of ocellar tubercle shiny, its apex reaching anterior 0.6 of frons, with slightly pointed apex; ocellar tubercle black. Cephalic setae and setulae yellow. Antenna yellow except for dorsal margin of first flagellomere brown, with thick grayish microtomentum; first flagellomere 0.75 times as long as wide; arista black except for basal segment brownish, with short pubescence. Proboscis black to yellowish brown with yellow setulae; palpus yellow with yellow setulae.

Thorax black with gray microtomentum, evenly covered with short setulae. Scutum as long as wide. Thoracic pleuron shiny black without microtomentum. Scutellum 0.6 times as long as wide; 3 pairs of scutellar setae on small tubercles; apical scutellar seta short, 0.5 times as long as scutellum. Setae and setulae on thorax yellow; notopleurals 1+1, developed. Legs with coxae black, femora black with distal tips yellow, fore tibia yellow with weakly infuscated medially, mid and hind tibiae black with both tips yel low, tarsi yellow. Setulae on legs yellow. Wing 2.2 times as long as wide, hyaline; veins brownish. Relative lengths of 2nd: 3rd: 4th costal sections = 6: 17: 4; cross-veins r-m and dm-cu not approximated, r-m at basal 0.65 of discal medial cell. Halter brown.

Abdomen shiny brown; venter yellow. Setulae on abdomen black.

Male genitalia (Figs 9-12): Epandrium blackish brown with long brown setulae; surstylus as long as epandrium in lateral view. Cercus short and broad, with moderately concave ventral margin in dorsal view. Pre- and postgonites fused, knife-like, incised on basal 1/3 of each inner margin; basiphallus longer than wide, cylindrical; distiphallus short, membranous; phallapodeme long, with basal stalk narrow in lateral view. Hypandrium broad, without two basal rounded projections, arms free and long, apex with internal projection long, external projection short.

Female. Unknown.

Type material.

Holotype, ♂, China: Guizhou: Maolan, Yaoqu, 30. V. 2010, leg. Dan Zhou (photographed and genitalia prepared). Paratype, 2 ♂♂, same data as holotype (in 75% alcohol, deposited in CAU).

Distribution.

China (Guizhou).

Remarks.

The new species is somewhat similar to S. minima (de Meijere), but can be separated from the latter by the following features: ocellar triangle reaching anterior 0.6 of frons, gena 0.5 times as wide as first flagellomere; in S. minima , the ocellar triangle reaches anterior 0.9 of frons, the gena is as wide as the first flagellomere ( Kanmiya 1982).

Etymology.

The specific name is from the Latin scalpriformis ( “knife-like”), referring to the shape of gonite.