Stegana (Steganina) nayun 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 nayun

description: Stegana (Steganina) nayun Li & Chen, sp. nov.
(Figs. 12C, 12D, 54)
Diagnosis. This species is similar to S. (S.) cylindrica Wang, Gao, & Chen, 2013 in the shape of male terminalia (as fig. 2 in Wang et al. 2013, Fig. 54), but can be distinguished from the latter by having the tubular aedeagus distoventrally with 3 rugae per side, lacking pubescence (Fig. 54C, D); the subepandrial sclerite lacking pubescence (Fig. 54G).
Description. Male and female: First flagellomere brownish. Clypeus yellow. Mesonotum brown medially, brownish yellow laterally (Fig. 12C). Katepisternum yellow (Fig. 12D). Scutellum brown medially, dark brown laterally, yellow at tip (Fig. 12C). Halter mostly grey (Fig. 12D). Fore femur with a row of 4 long setae on distal part of posteroventral surface. Abdominal tergites brown to dark brown; sternites brown, about 2 times as wide as long. Male terminalia (Fig. 54A–G): Epandrium with ca. 11 setae on dorsal to posterior portions per side (Fig. 54A). Surstylus with 1 peg-like tooth and some setulae near distal margin, lacking pubescence (Fig. 54A, B). Cercus lacking pubescence (Fig. 54A). Hypandrium strongly expanded anteromedially (Fig. 54C, D). Pregonite small, with 2 sensilla (Fig. 54C, D). Aedeagus lacking serrated process (Fig. 54C, D). Aedeagal sheath distally dorsad curved and with several minute, serrated processes (Fig. 54E, F). Subepandrial sclerite slightly rectangle distally (Fig. 54G). Female terminalia (Fig. 54H–J): Epiproct with several setae on distal 1/2 (Fig. 54H). Cercus and hypoproct with numerous setae and much pubescence (Fig. 54H, J). Eight sternite about 1.5 times as long as wide, glabrous on basal 4/5, with several setae and some pubescence on distal 1/5 (Fig. 54I).
HW = 0.38 (0.42), ch/o = 0.29 (0.38), prorb = 1.05 (1.50), rcorb = 0.79 (0.88), vb = 0.64 (0.93), dcl = 0.43 (0.35), presctl = 0.70 (0.70), sctl = 3.15 (2.39), sterno = 1.19 (0.93), orbito = 1.89 (1.89), dcp = 0.21 (0.21), sctlp = 1.78 (2.22), C = 1.98 (1.95), 4c = 1.05 (1.39), 4v = 1.20 (2.21), 5x = 1.54 (1.91), ac = 10.25 (13.00), M = 0.55 (0.76), C3F = 0.61 (0.70).
Type materials. Holotype ♂ (SCAU, No. 125730, DNA #2674), CHINA: Jinshan, Menglian, Yunnan, 22°19'29''N, 99°35'00''E, alt. 940m, 25.x.2017, ex tree trunk, H.W. Chen. Paratypes: 1♀ (SCAU, No. 125731, DNA #2693), other data same as holotype; 1♀ (SCAU, No. 125787, DNA #2608), Fengtongzhai, Baoxing, Sichuan, 30°32'42''N, 102°54'24''E, alt. 1500m, 18.vii.2017, ex tree trunk, Y.L. Wang.
Distribution. China (Sichuan, Yunnan).
Etymology. From the name of the type locality "Jinshan" belonging to "Nayun, Menglian, 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 pages 88-90, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657