Stegana (Steganina) yixiang 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 : 100

publication ID	https://doi.org/10.11646/zootaxa.5250.1.1
publication LSID	lsid:zoobank.org:pub:4729EAF3-8B78-4AAD-B373-9179D008F239
DOI	https://doi.org/10.5281/zenodo.7705626
persistent identifier	https://treatment.plazi.org/id/0393914C-2A41-871B-C282-FC5A6A0EFC6A
treatment provided by	Plazi (2023-03-07 08:36:00, last updated 2024-11-28 17:29:29)
scientific name	Stegana (Steganina) yixiang Zhang & Chen
status	sp. nov.

Treatment

Stegana (Steganina) yixiang Zhang & Chen View in CoL , sp. nov.

( Figs. 14C, 14D View FIGURE 14 , 64 View FIGURE 64 )

Diagnosis. This species is similar to S. (S.) yani sp. nov. in the shape of male terminalia ( Figs. 63 View FIGURE 63 , 64 View FIGURE 64 ), but can be distinguished from the latter by having the surstylus with numerous pubescence on outer surface ( Fig. 63A View FIGURE 63 ); the aedeagus with numerous regular, minute, serrated processes distomedially ( Fig. 63B, C View FIGURE 63 ); the subepandrial sclerite deeply bifurcated basally ( Fig. 64F View FIGURE 64 ).

Description. Male: First flagellomere brownish yellow. Clypeus yellow. Mesonotum and scutellum yellow ( Fig. 14C View FIGURE 14 ). Katepisternum brownish yellow ( Fig. 14D View FIGURE 14 ). Halter mostly grey ( Fig. 14D View FIGURE 14 ). Fore femur with a row of 3 thin setae on distal part of posteroventral surface. Abdominal tergites brownish yellow to brownish ( Fig. 14C, D View FIGURE 14 ); sternites brownish, slightly wider than long. Male terminalia ( Fig. 64 View FIGURE 64 ): Epandrium with ca. 9 setae on dorsal to posterior portions per side ( Fig. 64A View FIGURE 64 ). Surstylus lacking serrated process, with 1 peg-like tooth and some setulae near distal margin ( Fig. 64A View FIGURE 64 ). Cercus with sparse pubescence ( Fig. 64A View FIGURE 64 ). Hypandrium roundly expanded anteromedially ( Fig. 64B, C View FIGURE 64 ). Pregonite blurry or absent ( Fig. 64B, C View FIGURE 64 ). Aedeagus with numerous minute, serrated processes distolaterally ( Fig. 64B, C View FIGURE 64 ). Aedeagal sheath distally slender, strongly dorsad curved, and with some minute, serrated processes ( Fig. 64D, E View FIGURE 64 ).

Measurements and indices. BL = 2.47 mm in holotype, ThL = 1.40 mm, WL = 2.13 mm, WW = 1.07 mm, arb = 6/4, avd = 0.83, adf = 1.17, flw = 2.17, FW/HW = 0.40, ch/o = 0.22, prorb = 1.30, rcorb = 1.00, vb = 0.33, dcl = 0.53, presctl = 0.62, sctl = 1.31, sterno = 1.45, orbito = 2.80, dcp = 0.24, sctlp = 2.50, C = 2.00, 4c = 1.50, 4v = 1.67, 5x = 2.33, ac = 9.00, M = 1.17, C3F = 0.78.

Type material. Holotype ♂ ( SCAU, No. 125634, DNA #1940), CHINA: Yixiang, Pu'er , Yunnan, 22°44'19''N, 101°07'01''E, alt. 1420m, ex tree trunk, 28.iii.2013, J.J. Gao. GoogleMaps

Distribution. China (Yunnan).

Etymology. From the name of the type locality "Yixiang".

Figures

FIGURE 14. Head, thorax, and abdomen in dorsal and lateral views: A, B. S. (S.) yani Li & Chen, sp. nov.; C, D. S. (S.) yixiang Zhang & Chen, sp. nov.; E, F. S. (S.) zaduo Cui & Chen, sp. nov.; G, H. S. (S.) zhuoma Cui & Chen, sp. nov.

FIGURE 63. Stegana (Steganina) yani Li & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B, C. Hypandrium, aedeagus, and phallapodeme in ventral and lateral views; D, E. Aedeagal sheath in ventral and lateral views; F. Subepandrial sclerite in ventral view.

FIGURE 64. Stegana (Steganina) yixiang Zhang & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B, C. Hypandrium, aedeagus, and phallapodeme in ventral and lateral views; D, E. Aedeagal sheath in ventral and lateral views; F. Subepandrial sclerite in ventral view.