Stegana (Steganina) fuscipes 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 : 72-73

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

( Figs. 9A, 9B , 41 )

Diagnosis. This species is similar to S. (S.) multiprocera sp. nov. in the shape of male terminalia ( Figs. 41 , 53 ), but can be distinguished from the latter by having the frons entirely brownish, not shiny; the palpus large and dark brown distally ( Fig. 9B ); the pleura, katepisternum, and legs mostly dark brown to black ( Fig. 9B ); the aedeagus with 4 pairs of processes basolaterally ( Fig. 41C, D ).

Description. Male and female: First flagellomere black. Clypeus yellow. Mesonotum brown medially, yellow laterally ( Fig. 9A ). Scutellum brown, yellow at tip ( Fig. 9A ). Halter mostly brownish ( Fig. 9B ). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites mostly brown ( Fig. 9A, B ); sternites brown, about 2 times as wide as long. Male terminalia ( Fig. 41 ): Epandrium with ca. 10 setae on dorsal to posterior portions per side ( Fig. 41A ). Surstylus with some minute, serrated processes on outer surface, 1 peg-like tooth and several setulae near distal margin, lacking pubescence ( Fig. 41A, B ). Cercus lacking pubescence ( Fig. 41A ). Hypandrium slightly expanded anteromedially, with 2 spinous processes subposteromedially (pregonite?) ( Fig. 41C, D ). Pregonite blurry or absent ( Fig. 41C, D ). Aedeagus with much pubescence distally ( Fig. 41C, D ). Aedeagal sheath glabrous ( Fig. 41E, F ). Subepandrial sclerite slightly vaulted ( Fig. 41G ).

Measurements and indices. BL = 2.43 mm in holotype (2.66 in 1♀ paratype), ThL = 1.33 mm (1.39), WL = 2.27 mm (2.34), WW = 0.97 mm (1.05), arb = 7/5 (6/5), avd = 0.82 (0.84), adf = 1.04 (1.02), flw = 1.61 (1.50), FW/HW = 0.34 (0.37), ch/o = 0.20 (0.20), prorb = 1.19 (1.14), rcorb = 0.81 (0.59), vb = 0.62 (0.56), dcl = damaged (damaged), presctl = damaged (damaged), sctl = damaged (damaged), sterno = damaged (0.79), orbito = 1.74 (1.62), dcp = 0.32 (0.34), sctlp = 1.90 (1.69), C = 1.84 (1.64), 4c = 1.05 (1.02), 4v = 1.64 (1.48), 5x = 1.35 (1.40), ac = 10.25 (8.27), M = 0.59 (0.55), C3F = 0.62 (0.55).

Type materials. Holotype ♂ ( SCAU, No. 125695, DNA #2624), CHINA: Menglun, Mengla, Yunnan, 21°47'29''N, 101°22'59''E, alt. 560m, 19.xii.2017, ex tree trunk, H.W. Chen. Paratype: 1♀ ( SCAU, No. 125696, DNA #2649), other data same as holotype.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words '' fuscus " (= brown) and ''- pes " (= leg), referring to the dark brown legs.

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 41. Stegana (Steganina) fuscipes 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.

FIGURE 53. Stegana (Steganina) multiprocera 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.