Stegana (Steganina) zaduo 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 : 101-102

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

( Figs. 14E, 14F, 65A–C)

Diagnosis. This species is similar to S. (S.) fuscipes sp. nov. in the distally large and brown palpus and the mostly brown legs ( Figs. 9B, 14F), but can be distinguished from the latter by having the mostly yellow katepisternum ( Fig. 14F); the abdominal sternites about 3 times as wide as long.

Description. Female: First flagellomere yellow on basal 1/3, brown on distal 2/3. Clypeus brownish. Mesonotum brown medially, brownish yellow laterally ( Fig. 14E). Scutellum dark brown ( Fig. 14E). Halter mostly brownish ( Fig. 14F). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites mostly dark brown ( Fig. 14E, F); sternites brown. Female terminalia ( Fig. 65A–C): Epiproct with several setae, lacking pubescence ( Fig. 65A). Cercus and hypoproct with numerous setae and much pubescence ( Fig. 65A, C). Eighth sternite slightly longer than wide, glabrous on basal 3/4, with numerous setae and much pubescence on distal 1/4 ( Fig. 65B).

Measurements and indices. BL = 3.01 mm in holotype (2.94 in 1♀ paratype), ThL = 1.52 mm (1.49), WL = 2.63 mm (2.65), WW = 1.34 mm (1.21), arb = 7/5 (7/5), avd = 0.74 (0.75), adf = 1.51 (1.64), flw = 2.24 (2.77), FW/ HW = 0.34 (0.37), ch/o = 0.19 (0.18), prorb = 0.94 (1.15), rcorb = 0.65 (0.63), vb = 0.76 (0.97), dcl = 0.64 (0.65), presctl = 0.81 (0.79), sctl = 1.86 (2.07), sterno = 0.84 (0.87), orbito = 1.74 (1.82), dcp = 0.36 (0.37), sctlp = 1.42 (1.36), C = 1.63 (1.78), 4c = 1.11 (1.11), 4v = 1.29 (1.48), 5x = 1.42 (1.42), ac = 13.63 (12.75), M = 0.55 (0.56), C3F = 0.65 (0.61).

Type materials. Holotype ♀ ( SCAU, No. 125414, DNA #2687), CHINA: Moli Forest Park, Ruili , Yunnan, 24°07'05''N, 97°58'51''E, alt. 920m, 25.iv.2018, ex tree trunk, H.W. Chen . Paratype: 1♀ ( SCAU, No. 125415, DNA #2758), other data same as holotype .

Distribution. China (Yunnan).

Etymology. From the word " zaduo " in Dai language from the Dai nationality living in Yunnan, China, referring to the famous Murray Falls (also known as Zaduo Falls) in the type locality "Moli Forest Park".