Stegana (Steganina) cinereipecta Zhang & Chen

WANG, YA-LIAN, LI, BING-XUE, CUI, MENG-DI, ZHANG, YUAN, WANG, LE, ZHANG, CAI-HONG, TSAUR, SHUN-CHERN, CHEN, HONG-WEI & HUANG, JIA, 2023, Revision of the subgenus Stegana (Steganina) from China, with assessment of species delimitation using DNA barcodes (Diptera, Drosophilidae), Zootaxa 5250 (1), pp. 1-109 : 59-60

Stegana (Steganina) cinereipecta Zhang & Chen , sp. nov.

( Figs. 6G, 6H , 30 )

Diagnosis. This species is similar to S. (S.) convena Wang, Gao, & Chen, 2013 in the shape of hypandrium and aedeagal sheath (as fig. 1C, D in Wang et al. 2013, Fig. 30B–E ), but can be distinguished from the latter by having the katepisternum mostly grey, anteriorly slightly brownish ( Fig. 6H ); the surstylus with 1 peg-like tooth near distal margin ( Fig. 30A ); the subepandrial sclerite slightly rounded, deeply split medially ( Fig. 30F ).

Description. Male and female: First flagellomere brown. Clypeus yellow. Mesonotum brown medially, yellow to brownish laterally in male, entirely brown to dark brown in female ( Fig. 6G ). Scutellum brown, yellow at tip ( Fig. 6G ). Halter mostly grey ( Fig. 6G ). Fore femur with 3 thin, long setae on distal part of posteroventral surface. Abdominal tergites dark brown ( Fig. 6G, H ); sternites brown, about 2 times as wide as long. Male terminalia ( Fig. 30 ): Epandrium with ca. 17 setae on dorsal to posterior portions per side ( Fig. 30A ). Surstylus slightly squared, lacking serrated process, with several setulae near distal margin and pubescence posteriorly ( Fig. 30A ). Cercus with much pubescence ( Fig. 30A ). Hypandrium expanded anteromedially ( Fig. 30B, C ). Pregonite small, with 1 sensillum ( Fig. 30B, C ). Aedeagus expanded distally in ventral view, with numerous minute, serrated processes basolaterally and some pubescence distoventrally ( Fig. 30B, C ). Aedeagal sheath distally with numerous minute, serrated processes ( Fig. 30D, E ).

Measurements and indices. BL = 3.33 mm in holotype (2.67–2.80 in 2♂, 3.00– 3.87 in 2♀ paratypes), ThL = 1.67 mm (1.33 in ♂, 1.33–1.53 in ♀), WL = 2.40 mm (2.13–2.33 in ♂, 2.33–2.67 in ♀), WW = 1.20 mm (1.20–1.33 in ♂, 1.20–1.33 in ♀), arb = 6/4 (7–8/4–6), avd = 0.50 (0.50–1.14), adf = 1.25 (0.88–1.67), flw = 1.50 (1.38–2.00), FW/HW = 0.36 (0.36–0.50), ch/o = 0.31 (0.23–0.40), prorb = 1.07 (1.20–1.80), rcorb = 0.67 (0.67–1.20), vb = 0.33 (0.22–0.38), dcl = 0.57 (0.51–0.68), presctl = 0.72 (0.46–0.81), sctl = 1.72 (1.50–3.00), sterno = 0.83 (0.83–1.00), orbito = 2.00 (1.00–2.00), dcp = 0.19 (0.13–0.24), sctlp = 3.00 (1.80–2.50), C = 1.75 (1.50–2.55), 4c = 1.50 (1.50– 2.00), 4v = 2.50 (1.25–3.00), 5x = 1.50 (1.50–2.00), ac = 8.00 (6.67–12.00), M = 0.75 (0.75–1.00), C3F = 0.83 (0.80–0.83).

Type materials. Holotype ♂ ( SCAU, No. 125636, DNA #1443), CHINA: Yixiang, Pu'er , Yunnan, 22°44'19''N, 101°07'01''E, alt. 1420m, 13.v.2012, ex tree trunk, H.W. Chen . Paratypes: 2♂, 2♀ ( SCAU, Nos. 125637–40, DNA #1944), other data same as holotype.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words '' cinereus '' (= grey) and '' pectus '' (= thorax), referring to the mostly grey katepisternum.

Figures

FIGURE 6. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) alafoliacea Zhang & Chen, sp. nov.; C, D. S. (S.) baoxing Li & Chen, sp. nov.; E, F. S. (S.) bimai Cui & Chen, sp. nov.; G, H. S. (S.) cinereipecta Zhang & Chen sp. nov.; I, J. S. (S.) cordhirsuta Wang & Chen, sp. nov.

FIGURE 30. Stegana (Steganina) cinereipecta Zhang & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus