Stegana (Steganina) baoxing Li & 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 : 56-57

Stegana (Steganina) baoxing Li & Chen , sp. nov.

( Figs. 6C, 6D , 28 )

Diagnosis. This species is similar to S. (S.) alafoliacea sp. nov. in the dark body color ( Fig. 6A–D ), but can be distinguished from the latter by having the surstylus lacking serrated process ( Fig. 28A ); the aedeagus rounded distally in ventral view ( Fig. 28B ); the aedeagal sheath lacking serrated process ( Fig. 28D, E ).

Description. Male: First flagellomere brown. Clypeus dark brown medially, yellow laterally. Mesonotum and scutellum dark brown to black (Fig. 6C, D). Katepisternum brownish (Fig. 6D). Halter mostly grey (Fig. 6C). Fore femur with 3 thin, long setae on distal part of posteroventral surface. Abdominal tergites dark brown to black ( Fig. 6C, D ); sternites brown, about 2 times as wide as long. Male terminalia ( Fig. 28 ): Epandrium with ca. 8 setae on dorsal to posterior portions per side ( Fig. 28A ). Surstylus slightly curved subdistally, with 1 peg-like tooth and several setulae near distal margin ( Fig. 28A ). Cercus with much pubescence ( Fig. 28A ). Hypandrium expanded anteromedially ( Fig. 28B, C ). Pregonite small, lacking sensillum ( Fig. 28B, C ). Aedeagus slightly expanded distally, with numerous minute, serrated processes distolaterally and pubescence medially ( Fig. 28B, C ). Subepandrial sclerite slightly split distally ( Fig. 28F ).

Measurements and indices. BL = 3.16 mm in holotype, ThL = 1.45 mm, WL = 2.99 mm, WW = 1.04 mm, arb = 5/4, avd = 0.80, adf = 1.14, flw = 1.81, FW/HW = 0.34, ch/o = 0.25, prorb = 1.21, rcorb = 0.77, vb = 0.78, dcl = 0.42, presctl = 0.50, sctl = 3.16, sterno = 0.79, orbito = 1.80, dcp = 0.37, sctlp = 1.56, C = 2.07, 4c = 1.43, 4v = 2.65, 5x = 2.22, ac = 12.11, M = 0.93, C3F = 0.59.

Type material. Holotype ♂ ( SCAU, No. 125693, DNA #2607), CHINA: Fengtongzhai, Baoxing , Sichuan, 30°32'42''N, 102°54'24''E, alt. 1500m, 18.vii.2017, ex tree trunk, L. Gong.

Distribution. China (Sichuan).

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

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