Stegana (Steganina) danbaensis, Chen, Xi-Peng & Chen, Hong-Wei, 2012

Chen, Xi-Peng & Chen, Hong-Wei, 2012, Ten new species of the Stegana (Steganina) shirozui species group (Diptera, Drosophilidae) from China, Zootaxa 3333, pp. 24-37 : 25

Stegana (Steganina) danbaensis sp. nov.

( Figs 1–6 )

Diagnosis. This species is related to S. multidentata from Shennonjia, Hubei, but clearly distinguishable from the latter by the epandrium and aedeagus (in S. multidentata : epandrium broadened on posterior margins, more wider than 3/5 high; aedeagus distinctly expanded submedially and with rhombic opening in ventral view).

Description. Male terminalia: Epandrium roundly protruded ventrally, approximately twice as high as wide on posterior margins ( Fig. 1 ). Cercus lacking pubescence ( Fig. 2 ). Surstylus with 8 prensisetae submedially ( Fig. 2 ). Tenth sternite strongly protruded apicolaterally ( Fig. 3 ). Paramere with ca. 5–6 sensilla ( Figs 4, 5 ). Aedeagus with globular projections bearing finely serrated processes basally ( Figs 4, 5 ); nearly oval on opening in ventral view ( Fig. 4 ). Gonopods round apically, not protruded dorsomedially ( Fig. 6 ).

Measurements. BL = 2.78 mm in holotype; ThL = 1.68 mm; WL = 3.15 mm; WW = 1.51 mm, arb = 8/5, avd = 0.83, adf = 1.84, flw = 1.87, FW/HW = 0.45, ch/o = 0.16, prorb = 0.83, rcorb = 0.67, vb = 0.41, dcl = 0.46, sctl = 1.40, sterno = 0.90, orbito = 1.80, dcp = 0.25, sctlp = 2.20, C = 2.17, 4c = 1.02, 4v = 1.66, 5x = 1.57, ac = 10.50, M = 0.54, C3F = 0.68.

Type material. Holotype 3 ( SCAU, No. 120721), CHINA: Danba, Ganzi, Sichuan, 30˚41' N, 101˚45' E, 2670 m, 1.ix.2006, MF Xu.

Distribution. China (Sichuan).

Etymology. In reference to type locality, called “hill town” in the Tibetan language.

Figures

FIGURES 1 – 6. Stegana (Steganina) danbaensis sp. nov., male terminalia: 1. Epandrium (epan), cercus (cerc) and surstylus (sur) (lateral view); 2. surstylus (ventral view); 3. 10 th sternite (ventral view); 4, 5. hypandrium (hypd), parameres (pm), aedeagus (aed) and aedeagal apodeme (aed a) (ventral and lateral view); 6. gonopods (ventral view). Scale bars: 0.1 mm.