Stegana (Steganina) cornuta Li & Chen, sp. nov.
Creators: name: WANG, YA-LIAN
name: LI, BING-XUE
name: CUI, MENG-DI
name: ZHANG, YUAN
name: WANG, LE
name: ZHANG, CAI-HONG
name: TSAUR, SHUN-CHERN
name: CHEN, HONG-WEI
name: HUANG, JIA
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana
Stegana cornuta

description: Stegana (Steganina) cornuta Li & Chen, sp. nov.
(Figs. 7A, 7B, 32)
Diagnosis. This species closely resembles S. (S.) angulistrata Wu & Chen, 2010 in the shape of male terminalia (as fig. 1–6 in Wu & Chen 2010, Fig. 32), but can be distinguished from the latter by having the aedeagus medially lacking serrated process but mediolaterally with a pair of horned processes (Fig. 32C, D); the aedeagal sheath distally slender and strongly dorsad curved (Fig. 32E, F).
Description. Male and female: First flagellomere brown. Clypeus yellow. Mesonotum yellow (Fig. 7A). Katepisternum yellowish (Fig. 7B). Scutellum yellow (Fig. 7A). Halter mostly grey (Fig. 7B). Fore femur with a row of 3 or 4 long setae on distal part of posteroventral surface. Abdominal tergites brown to dark brown (Fig. 7A, B); sternites brown, slightly wider than long. Male terminalia (Fig. 32): Epandrium with ca. 9 setae on dorsal to posterior portions per side (Fig. 32A). Surstylus with 1 prensiseta, several setulae, and serrated processes near distal margin (Fig. 32A, B). Cercus lacking pubescence (Fig. 32A). Hypandrium expanded anteromedially (Fig. 32C, D). Pregonite small, with 2 sensilla (Fig. 32C, D). Aedeagus rounded distally, with numerous minute, serrated processes laterally and much pubescence distoventrally and sublaterally (Fig. 32C, D). Aedeagal sheath with some minute, serrated processes distally (Fig. 32E, F). Subepandrial sclerite slightly vaulted, split medially (Fig. 32G).
Measurements and indices. BL = 3.00 mm in holotype (2.34–3.04 in 4♂, 2.88–3.44 in 5♀ paratypes), ThL = 1.48 mm (1.21–1.46 in ♂, 1.29–1.80 in ♀), WL = 2.32 mm (2.31–2.59 in ♂, 2.43–2.72 in ♀), WW = 1.20 mm (0.97–1.09 in ♂, 0.91–1.24 in ♀), arb = 9/5 (6–9/4–6), avd = 0.83 (0.76–0.93), adf = 1.50 (0.91–1.29), flw = 2.50 (1.74–2.16), FW/HW = 0.48 (0.27–0.46), ch/o = 0.17 (0.26–0.37), prorb = 1.50 (0.53–1.41), rcorb = 0.70 (0.59– 1.16), vb = 0.56 (0.46–1.22), dcl = 0.33 (0.43–0.69), presctl = 0.57 (0.39–0.63), sctl = 2.23 (1.47–2.27), sterno = 0.64 (0.53–0.96), orbito = 1.40 (1.67–1.98), dcp = 0.28 (0.16–0.39), sctlp = 1.89 (1.55–2.08), C = 1.74 (1.53–2.13), 4c = 1.55 (1.06–1.38), 4v = 2.40 (1.36–2.10), 5x = 1.50 (1.06–2.00), ac = 15.50 (8.36–17.55), M = 0.75 (0.58–0.72), C3F = 0.81 (0.56–0.71).
Type materials. Holotype ♂ (SCAU, No. 125586, DNA #1414, 2665), CHINA: Yixiang, Pu'er, Yunnan, 22°44'19''N, 101°07'01''E, alt. 1420m, 13.v.2012, ex tree trunk, H.W. Chen. Paratypes: 2♂, 5♀ (SCAU, Nos. 125587–93, DNA #1414, 1939, 2665, 2702), 1♂, 1♀ on 28–30.iii.2013, J.J. Gao, other data same as holotype; 1♂ (SCAU, No. 125594, DNA #2173), Mengdong, Cangyuan, Yunnan, 23°10'08''N, 99°13'52''E, alt. 1320m, 10.v.2016, ex tree trunk, J. Huang.
Distribution. China (Yunnan).
description: Published as part of 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), pp. 1-109 in Zootaxa 5250 (1) on page 61, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657