Stegana (Steganina) septencolorata 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 : 95-96

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

( Figs. 13E, 13F , 60 )

Diagnosis. This species is similar to S. (S.) nayun sp. nov. in the shape of male terminalia ( Figs. 54 , 60 ), but can be distinguished from the latter by having the surstylus with 1 peg-like tooth and some minute, serrated processes near distal margin ( Fig. 60A, B ); the cercus with much pubescence ( Fig. 60A ); the aedeagus with some pubescence distoventrally ( Fig. 60C, D ); the subepandrial sclerite vaulted, roundly expanded distally ( Fig. 60G ).

Description. Male: First flagellomere brownish. Clypeus brownish yellow. Mesonotum brownish medially, yellow laterally ( Fig. 13E ). Katepisternum yellowish, brownish on anterior corner ( Fig. 13F ). Scutellum brown, yellow at tip ( Fig. 13E ). Halter mostly white ( Fig. 13F ). Fore femur with a row of 3 long, suberect setae on ventral surface. Abdominal tergites brownish to brown ( Fig. 13E, F ); sternites yellow, about 2 times as wide as long. Male terminalia ( Fig. 60 ): Epandrium with ca. 7 setae on dorsal to posterior portions per side ( Fig. 60A ). Surstylus with numerous setulae near distal margin, lacking pubescence ( Fig. 60A, B ). Hypandrium roundly expanded anteromedially ( Fig. 60C, D ). Pregonite small, with 5 sensilla ( Fig. 60C, D ). Aedeagus tubular, distally expanded, distoventrally with 5 rugae per side, lacking serrated process ( Fig. 60C, D ). Aedeagal sheath with some minute, serrated processes distally ( Fig. 60E, F ).

Measurements and indices. BL = 2.23 mm in holotype, ThL = 0.96 mm, WL = 2.07 mm, WW = 0.93 mm, arb = 5/3, avd = 0.85, adf = 1.12, flw = 1.73, FW/HW = 0.34, ch/o = 0.17, prorb = 0.90, rcorb = 0.23, vb = 0.48, dcl = 0.50, presctl = 0.55, sctl = 2.00, sterno = damaged, orbito = 2.33, dcp = damaged, sctlp = 1.53, C = 1.89, 4c = 0.71, 4v = 1.11, 5x = 1.36, ac = 11.29, M = 0.38, C3F = 0.78.

Type material. Holotype ♂ ( SCAU, No. 125668, DNA #1879), CHINA: Yixiang, Pu'er , Yunnan, 22°44'19''N, 101°07'01''E, alt. 1420m, 13.v.2012, ex tree trunk, H.W. Chen.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words " septen -" (= seven) and " coloratus " (= colored), referring to the type locality " Yunnan " as a colorful place in China.

Figures

FIGURE 13. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) rava Cui & Chen, sp. nov.; C, D. S. (S.) sciophila Li & Chen, sp. nov.; E, F. S. (S.) septencolorata Li & Chen, sp. nov.; G, H. S. (S.) silvestrella Zhang & Chen, sp. nov.; I, J. S. (S.) simola Cui & Chen, sp. nov.

FIGURE 54. Stegana (Steganina) nayun Li & Chen, sp. nov., male (A–G) and female terminalia (H–J). A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; E, F.Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view; H. Epiproct and cercus in dorsal view; I. Eighth sternite in ventral view; J. Hypoproct in ventral view.

FIGURE 60. Stegana (Steganina) septencolorata Li & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; E, F. Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view.