Stegana (Steganina) pianmaensis, 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 : 32

Stegana (Steganina) pianmaensis sp. nov.

( Figs 45–50 )

Diagnosis. This species is related to S. danbaensis sp. nov. in the male terminalia, but in this species: 10th sternite slightly protruded apicolaterally ( Fig. 47 ); aedeagus lacking serrated, minute processes on dorsal surfaces ( Fig. 49 ).

Description. Male terminalia: Epandrium roundly protruded ventrally ( Fig. 45 ). Cercus lacking pubescence ( Fig. 45 ). Surstylus with 8 prensisetae submedially ( Fig. 46 ). Tenth sternite broadened, slightly protruded apico- and basolaterally ( Fig. 47 ). Paramere with ca. 5, 6 sensilla ( Figs 48, 49 ). Aedeagus with globular projections bearing finely serrated processes basally ( Figs 48, 49 ), nearly heart-shaped on opening in ventral view, protruded apically ( Fig. 48 ). Gonopods broadly round apically, not protruded dorsomedially ( Fig. 50 ).

Measurements. BL = 2.89 mm in holotype (2.93 mm in 1Ƥ paratype), ThL = 1.76 mm (1.89 mm), WL = 3.48 mm (3.50 mm), WW = 1.48 mm (1.53 mm), arb = 8/6 (8/5–6), avd = 0.70 (0.83), adf = 1.43 (1.49), flw = 1.86 (1.86), FW/HW = 0.41 (0.43), ch/o = 0.16 (0.16), prorb = 0.90 (0.84), rcorb = 0.67 (0.65), vb = 0.40 (0.43), dcl = 0.45 (0.46), presctl = 0.50 (0.50), sctl = 1.38 (1.39), sterno = 0.88 (0.88), orbito = 1.80 (1.80), dcp = 0.26 (0.25), sctlp = 2.30 (2.20), C = 2.07 (2.17), 4c = 1.11 (1.02), 4v = 1.86 (1.66), 5x = 1.46 (1.57), ac = 10.25 (10.50), M = 0.51 (0.54), C3F = 0.79 (0.68).

Type material. Holotype 3 ( SCAU, No. 120776), CHINA: Pianma, Baoshan, Yunnan, 26˚01’N, 98˚37’E, 1700 m, 12.viii.2001, HW Chen. Paratype: CHINA: 1Ƥ ( SCAU, No. 120777), same data as holotype.

Distribution. China (Yunnan).

Etymology. In reference to the type locality.

Figures

FIGURES 45 – 50. Stegana (Steganina) pianmaensis sp. nov., male terminalia: 45. Epandrium, cercus and surstylus; 46. surstylus; 47. 10 th sternite; 48, 49. hypandrium, aedeagus and aedeagal apodeme; 50. gonopods. Scale bars: 0.1 mm.