Stegana (Steganina) labao Cui & 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 : 78

Stegana (Steganina) labao Cui & Chen , sp. nov.

( Figs. 10C, 10D , 42G–I )

Diagnosis. This species closely resembles S. (S.) idiasta sp. nov. in the shape of female terminalia ( Fig. 42D–I ), but can be distinguished from the latter by having the 8th sternite slightly longer than wide, glabrous on basal 3/4, with some long setae and pubescence on distal 1/4 ( Fig. 42H ).

Description. Female: First flagellomere brown. Clypeus yellow. Mesonotum yellow ( Fig. 10C ). Katepisternum yellowish ( Fig. 10D ). Scutellum brown, dark brown near distal margin ( Fig. 10C ). Halter mostly grey ( Fig. 10D ). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites brown ( Fig. 10C, D ); sternites brown, slightly wider than long. Female terminalia ( Fig. 42G–I ): Epiproct with some setae on distal 2/3 ( Fig. 42G ). Cercus and hypoproct with numerous setae and much pubescence ( Fig. 42G, I ).

Measurements and indices. BL = 3.29 mm in holotype, ThL = 1.08 mm, WL = 2.14 mm, WW = 0.87 mm, arb = 6/4, avd = 0.67, adf = 1.07, flw = 1.65, FW/HW = 0.35, ch/o = 0.21, prorb = 1.12, rcorb = 0.71, vb = 0.60, dcl = 0.87, presctl = 0.76, sctl = 1.35, sterno = damaged, orbito = 2.06, dcp = 0.40, sctlp = 1.24, C = 1.65, 4c = 1.33, 4v = 1.98, 5x = 1.67, ac = 13.60, M = 0.59, C3F = 0.73.

Type material. Holotype ♀ ( SCAU, No. 125692, DNA #1903), CHINA: Yixiang, Pu'er , Yunnan, 22°44'19''N, 101°07'01''E, alt. 1420m, 28.v.2015, ex tree trunk, H.W. Chen.

Distribution. China (Yunnan).

Etymology. From the word " labao " in Hani language from the Hani nationality living in Yunnan, China, referring to the meaning "singing folk song".

Figures

FIGURE 10. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) kanda sp. nov.; C, D. S. (S.) labao Cui & Chen, sp. nov.; E, F. S. (S.) lancang Li & Chen, sp. nov.; G, H. S. (S.) latifoliacea Wang & Chen, sp. nov.; I, J. S. (S.) liusanjieae Li & Chen, sp. nov.

FIGURE 42. Female terminalia in Stegana (Steganina) glaucopalpula Cui & Chen, sp. nov. (A–C), S. (S.) idiasta Cui & Chen, sp. nov. (D–F), and S. (S.) labao Cui & Chen, sp. nov. (G–I). A, D, G. Epiproct and cercus in dorsal view; B, E, H. Eighth sternite in ventral view; C, F, I. Hypoproct in ventral view.