Stegana (Oxyphortica) hirtipenis, Xu & Gao & Chen, 2007

Xu, Miao-Feng, Gao, Jian-Jun & Chen, Hong-Wei, 2007, Three New Species Of Stegana (Oxyphortica) From Yunnan Province, Southwestern China (Insecta: Diptera: Drosophilidae), Raffles Bulletin of Zoology 55 (1), pp. 43-47 : 46-47

Stegana (Oxyphortica) hirtipenis , new species

( Figs. 9–12 )

Material examined. – Holotype: male, CHINA, Yexianggu (22 ° 20'N 100 ° 51'E), Mengyang, Xishuangbanna , Yunnan, alt. 700 m, coll. Hong-wei Chen, 14 Sep.2002 ( KIZ).

Paratype 1 male, same data as holotype ( SCAU) .

Diagnosis. – Surstylus nearly triangular, setigerous along inner margin ( Fig. 10 ); aedeagus smaller, basally and apically narrowed, rounded ( Figs. 11, 12 ); gonopod broad, not bilobed ( Fig. 11 ).

Description. – Only those characters that differ from the species above are given in this description..

Male. Head: Pedical yellowish brown, with 1 long seta and several minute setulae.

Wing: Costal vein between R 2+3 and R 4+5 with ca. 5 peg-like spinules on ventral surface.

Abdomen: All tergites mostly brown; second to sixth yellow on anterior margin.

Male terminalia: Epandrium with anterior margin of apodeme developed, slightly protruded on posteromedial margin ( Fig. 9 ). Paramere absent.

Measurements: BL = 2.65 mm in holotype (2.85 mm in paratype); ThL = 1.28 mm (1.30); WL = 2.10 mm (2.10); WW = 1.00 mm (0.98).

Indices: arb = 7/4 (7/5); avd = 1.00 (1.00); adf = 2.62 (2.88); flw = 2.00 (2.13); FW/HW = 0.37(0.38); ch/o = 0.09 (0.11); prorb = 1.68 (1.04); rcorb = 0.73 (0.69); vb = 0.50 (0.59); dcl = 0.39 (0.42); presctl = 0.52 (0.44); sctl = 1.17 (1.16); sterno = 0.78 (0.70); orbito = 1.63 (1.63); dcp = 0.24 (0.24); sctlp = 1.00 (0.83); C = 2.58 (2.58); 4c = 0.96 (0.92); 4v = 2.08 (2.00); 5x = 2.00 (2.11); ac = 5.33 (5.33); M = 0.72 (0.73); C3F = 1.00 (1.00).

Etymology. – A combination of the Latin words: “hirtus” and “penis”, referring to the pubescent aedeagus.

Distribution. – China (Yunnan).

Remarks. – This species is very similar to S. (O.) acutipenis , in that it has the apically narrowed aedeagus, but it can be distinguished based on the surstylus and aedeagus. In acutipenis the surstylus is elongate, basally with ca. 6 long bristles, submedially slightly curved, and distally setigerous; the aedeagus is basally rounded, and medially broadened.

Figures

Figs. 9–12. Stegana (Oxyphortica) hirtipenis, new species, male genitalia: 9, epandrium and cercus (lateral view); 10, surstylus (frontal view); 11, hypandrium, gonopod, paramere, aedeagus and aedeagal apodeme (ventral view); 12, ditto (lateral view). Scale bar = 0.1 mm.