Stegana (Steganina) cucullata 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 cucullata

description: Stegana (Steganina) cucullata Li & Chen, sp. nov.
(Figs. 7C, 7D, 33)
Diagnosis. This species closely resembles S. (S.) eurystoma Wang, Gao, & Chen, 2013 in the shape of male terminalia (as fig. 3 in Wang et al. 2013, Fig. 33), but can be distinguished from the latter by having the pregonite blurry or absent (Fig. 33C, D, J, K); the aedeagus lacking serrated process near distal margin (Fig. 33C, D, J, K); the aedeagal sheath distally slightly strong and dorsad curved (Fig. 33E, F, L, M).
Remarks. The type specimens collected from Guangxi and Sichuan slightly differ from those from Chongqing in the surstylus lacking serrated process, with 1 peg-like tooth near distal margin (Fig. 33B, I), the cercus lacking pubescence (Fig. 33A, H), and the aedeagus with several minute, serrated processes distally and pubescence distoventrally (Fig. 33C, D, J, K). They were conservatively identified as conspecific.
Description. Male and female: First flagellomere brown. Clypeus yellow. Mesonotum dark brown, with brownish yellow longitudinal stripes submedially and laterally (Fig. 7C). Katepisternum yellowish (Fig. 7D). Scutellum dark brown (Fig. 7C). Halter mostly grey (Fig. 7D). Fore femur with a row of 4 or 5 sturdy setae on distal part of posteroventral surface. Abdominal tergites dark brown (Fig. 7C, D); sternites yellow, about 2 times as wide as long. Male terminalia (Fig. 33): Epandrium with ca. 14 setae on dorsal to posterior portions per side (Fig. 33A, H). Surstylus with numerous setulae near distal margin (Fig. 33A, B, H, I). Hypandrium roundly expanded anteromedially (Fig. 33C, D, J, K). Pregonite with 1 or 2 sensilla (Fig. 33C, J, K). Aedeagus spoon-shaped, distally broadened (Fig. 33C, D, J, K). Subepandrial sclerite slightly vaulted, broadened distally (Fig. 33G, N).
Measurement and indices. BL = 3.64 mm in holotype (2.35–3.15 in 5♂, 2.40–4.00 in 5♀ paratypes), ThL = 1.75 FW/HW = 0.37 (0.30–0.48), ch/o = 0.27 (0.18–0.36), prorb = 0.71 (0.76–1.38), rcorb = 0.53 (0.60–0.90), vb = 0.38 (0.50–0.78), dcl = damaged (0.36–0.75), presctl = 0.52 (0.31–0.78), sctl = 1.52 (1.56–2.13), sterno = 0.56 (0.55–1.17), orbito = 2.50 (1.20–2.40), dcp = 0.43 (0.15–0.34), sctlp = 1.64 (1.54–2.00), C = 1.71 (1.68–2.05), 4c = 1.24 (0.95–2.40), 4v = 1.88 (1.48–2.33), 5x = 1.57 (0.72–1.91), ac = 10.50 (7.33–12.67), M = 0.65 (0.53–0.82), C3F = 0.53 (0.54–0.72).
Type materials. Holotype ♂ (SCAU, No. 121109, DNA #546), CHINA: Fengtongzhai, Baoxing, Sichuan, 30°32'42''N, 102°54'24''E, alt. 1700m, 19.ix.2005, ex tree trunk, H.W. Chen. Paratypes: 1♀ (SCAU, No. 121110), other data same as holotype; 5♂, 3♀ (SCAU, Nos. 125595–603, DNA #2609), 18.vii.2017, L. Gong, Y. Lin, Y.L. Wang, other data same as holotype; 1♂ (SCAU, No. 125604, DNA #983), Maoershan, Xing'an, Guangxi, 25°51'28''N, 110°25'01''E, alt. 700m, 24.ix.2006, ex tree trunk, J.J. Jiang; 1♂ (SCAU, No. 125605, DNA #1782), Simianshan, Jiangjing, Chongqing, 28°37'19''N, 106°23'50''E, alt. 1108m, 7.vii.2014, ex tree trunk, Y.Q. Liu.
Distribution. China (Guangxi, Chongqing, Sichuan).
Etymology. From the Latin word " cucullatus " (= cucullate), referring to the spoon-shaped aedeagus.
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 pages 62-64, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657