Stegana (Steganina) xishuangbanna, 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 : 33-34

Stegana (Steganina) xishuangbanna sp. nov.

( Figs 58–64 )

Diagnosis. This species is related to S. saigusai from Kumamoto, Japan, but clearly distinguishable from the latter by the aedeagus (in S. saigusai : aedeagal opening nearly triangular in ventral view, with longer and even tentaclelike setae).

Description. Male terminalia: Epandrium strongly protruded ventrally ( Fig. 58 ). Cercus lacking pubescence ( Fig. 58 ). Surstylus with 5 prensisetae submedially ( Fig. 59 ). Tenth sternite furcated basally, protruded apically ( Fig. 60 ). Paramere with ca. 5–6 sensilla ( Figs 61, 62 ). Aedeagus lacking minute processes, slightly rhombic on opening in ventral view ( Figs 61, 62 ). Dorsomedial projection of gonopods with serrated, minute processes distally ( Figs 63, 64 ).

Measurements. BL = 2.40 mm in holotype (range in 23 and 2Ƥ paratypes: 2.35–2.66 mm in 3, 2.56–2.58 mm in Ƥ), ThL = 1.34 mm (1.28–1.70 mm in 3, 1.84–1.90 mm in Ƥ), WL = 2.63 mm (2.59–3.28 mm in 3, 2.65– 2.89 mm in Ƥ), WW = 1.12 mm (1.08–1.40 mm in 3, 1.42–1.52 mm in Ƥ), arb = 8/6 (7/5–9/6), avd = 0.83 (0.75– 0.83), adf = 1.83 (1.50–1.86), flw = 2.00 (1.63–1.75), FW/HW = 0.43 (0.43–0.44), ch/o = 0.21 (0.20–0.26), prorb = 1.08 (1.07–1.08), rcorb = 0.83 (0.75–0.80), vb = 0.36 (0.38–0.42), dcl = 0.50 (0.46–0.52), presctl = 0.51 (0.54– 0.62), sctl = 1.20 (1.15–1.36), sterno = 0.79 (0.83), orbito = 2.00 (2.00–2.25), dcp = 0.22 (0.18–0.21), sctlp = 1.70 (1.75–2.00), C = 2.24 (1.79–2.13), 4c = 0.97 (1.09–1.27), 4v = 1.63 (1.50–1.86), 5x = 1.50 (1.55–1.70), ac = 7.25 (7.00–8.25), M = 0.50 (0.47–0.65), C3F = 0.84 (0.82–0.88).

Type material. Holotype 3 ( SCAU, No. 120782), CHINA: Mengyang, Xishuangbanna , Yunnan, 22°20' N, 100°54' E, 600 m, 14.ix.2002, HW Chen. Paratypes: CHINA: 132Ƥ ( SCAU, Nos 120783 -85), same data as holotype; 33 ( SCAU, Nos 120786 -88), Menglun, Xishuangbanna , Yunnan, 21°41 N, 101°25 E, 700 m, 17– 19.iv.2007, HW Chen, JJ Gao; 33 ( KIZ), Mengla, 21°28' N, 101°38' E, 600 m, Xishuangbanna , Yunnan, 21– 24.iv.2007, HW Chen.

Distribution. China (Yunnan).

Etymology. The specific name means “dreamy and mystical eden” in the language of the Dai nationality in Xishuangbanna .

Figures

FIGURES 58 – 64. Stegana (Steganina) xishuangbanna sp. nov., male terminalia: 58. Epandrium, cercus and surstylus; 59. surstylus; 60. 10 th sternite; 61, 62. hypandrium, aedeagus and aedeagal apodeme; 63, 64. gonopods. Scale bars: 0.1 mm.