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".

Figures

FIGURE 9. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) fuscipes Li & Chen, sp. nov.; C, D. S. (S.) glaucopalpula Cui & Chen, sp. nov.; E, F. S. (S.) haba Zhang & Chen, sp. nov.; G, H. S. (S.) hirticlavata Cui & Chen, sp. nov.; I, J. S. (S.) idiasta Cui & Chen, sp. nov.

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 65. Female terminalia in Stegana (Steganina) zaduo Cui & Chen, sp. nov. (A–C) and Stegana (Steganina) zhuoma