Ptychoptera lii, Kang, Zehui, Yao, Gang & Yang, Ding, 2013

Kang, Zehui, Yao, Gang & Yang, Ding, 2013, Five new species of Ptychoptera Meigen with a key to species from China (Diptera: Ptychopteridae), Zootaxa 3682 (4), pp. 541-555 : 544-546

Ptychoptera lii sp. nov.

( Figs. 7–12 )

Diagnosis. First tergum brown; 2nd to 4th terga mostly yellow, with brown posterior margins; 5th to 7th terga dark brown; male genitalia uniformly yellow. Hypandrium broad, concave at base, apical part U-shaped, with a triangular projection medially; apical part with long dense hairs at posterior margin.

Description. Male. Body length 7.0 mm, wing length 7.5 mm. Head mostly yellow, except vertex black; hairs on head black. Compound eyes black without pubescence. Antenna with scape, pedicel and first flagellomere yellow, 2nd to 13th flagellomeres dark brown, with uniformly black hairs. Proboscis yellow with black hairs. Palpus yellow, with black hairs.

Thoracic dorsum mostly black, except middle part of scutellum yellow brown; mesopleuron uniformly yellow. Coxae and trochanters uniformly yellow; femora yellow at base, dark brown apically; tibiae mostly yellow, except apical margin dark brown; base of first tarsomere yellow, gradually darkened apically, 2nd to 5th tarsomeres dark brown; hairs on legs black. Relative length of 1st to 5th tarsomeres in hindleg as 9.2: 2.1: 1.3: 1: 1. Wing ( Fig. 8 ) 3.4 times as long as wide, subhyaline. Wing marked with one narrow band and one brown cloud as follows: band extending from basal of Rs to middle section of CuA; brown cloud along basal part of R4. Veins brown. Venation: Sc ending in C at level of basal 1/3 of R2+3; Rs shorter than r-m. Haltere yellow brown, with black hairs. Prehaltere yellow brown.

Abdomen: First tergum brown; 2nd to 4th terga mostly yellow, with brown posterior margins; 5th to 7th terga dark brown; 1st to 4th sterna yellow, 5th to 8th sterna dark brown. Hairs on abdomen black. Male genitalia ( Figs. 9–12 ): Epandrium with a pair of posterior projections, each projection simple, broadest at base, tapering and incurve distally. Hypandrium broad at base, concave medially, apical part U-shaped, with a triangular projection medially, apical part with long dense hairs at posterior margin. Gonocoxite swollen ventrally. Gonostylus broad at base, medial part with a finger-like projection interiorly, truncate apically; distal part with a pair of branched projections, interior projection broad with short dense hairs, external projection narrow, finger-like. Paramere short, pointed apically.

Female. Unknown.

Type material. HOLOTYPE: 3, CHINA, Guizhou, Suiyang, Kuankuoshui, 2010. VI.2, Yan Li. PARATYPES: 23, same data as holotype; 23, Guizhou, Suiyang, Kuankuoshui, 2010. VI.5, Dan Zhou.

Distribution. China (Guizhou).

Etymology. The specific name refers to the collector Yan Li.

Remarks. This new species is somewhat similar to P. formosensis Alexander , but can be easily separated from it by the wings being much wider and gonostylus with three projections. In P. formosensis Alexander , the gonostylus is complex with five projections ( Nakamura & Saigusa 2009).

Figures

FIGURES 7 – 8. Ptychoptera lii sp. nov. (male). 7. Habitus of male, lateral view; 8. Wing. Scale bar: 2.0 mm.

FIGURES 9 – 12. Ptychoptera lii sp. nov. 9. Male Genitalia, lateral view; 10. Hypandrium, ventral view; 11. Epandrium, dorsal view; 12. Gonocoxite and gonostylus, dorsal view. Scale bar: 0.25 mm.