Stegana (Steganina) fusca 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 fusca

description: Stegana (Steganina) fusca Li & Chen, sp. nov.
(Figs. 8I, 8J, 40)
Diagnosis. This species differs from the other Steganina species in having the small body size (BL ranged from 2.33–2.85 mm in measured specimens) and the relatively light body color (Fig. 8I, J); the aedeagal opening nearly triangular in ventral view, with thick pubescence (Fig. 40B).
Description. Male and female: First flagellomere brown. Clypeus yellow. Mesonotum brownish yellow in male, brown medially, brownish laterally in female (Fig. 8I). Katepisternum yellowish (Fig. 8J). Scutellum brownish medially, brown laterally (Fig. 8I). Halter mostly brownish (Fig. 8J). Fore femur with a row of 3 strong setae on distal part of posteroventral surface. Abdominal tergites yellow to brownish in male (Fig. 8I, J), brown in female; sternites brown, slightly wider than long. Male terminalia (Fig. 40): Epandrium with ca. 10 setae on dorsal to posterior portions per side (Fig. 40A). Surstylus with 1 peg-like tooth and several setulae near distal margin, lacking pubescence (Fig. 40A). Cercus lacking pubescence (Fig. 40A). Hypandrium roundly expanded anteromedially (Fig. 40B, C). Pregonite with 5 sensilla (Fig. 40B, C). Aedeagal sheath distally dorsad curved and with several minute, serrated processes (Fig. 40D, E). Subepandrial sclerite slightly vaulted (Fig. 40F).
Measurements and indices. BL = 2.75 mm in holotype (2.33–2.73 in 2♂, 2.37–2.85 in 3♀ paratypes), ThL = 1.29 mm (1.15–1.34 in ♂, 1.21–1.34 in ♀), WL = 2.21 mm (2.25–2.68 in ♂, 2.41–2.65 in ♀), WW = 1.14 mm (1.01–1.24 in ♂, 0.95–1.16 in ♀), arb = 7/3 (6–8/4–5), avd = 0.63 (0.74–0.89), adf = 1.24 (1.03–1.50), flw = 1.85 (2.36–3.13), FW/HW = 0.41 (0.37–0.43), ch/o = 0.26 (0.16–0.39), prorb = 1.35 (0.83–1.06), rcorb = 1.10 (0.57– 0.72), vb = 0.89 (0.61–0.75), dcl = 0.66 (0.54–0.75), presctl = 0.64 (0.52–0.78), sctl = 1.90 (1.87–2.52), sterno = 0.89 (0.67–1.14), orbito = 1.62 (1.63–2.05), dcp = 0.30 (0.29–0.36), sctlp = 1.39 (1.33–1.93), C = 1.65 (1.49–1.82), 4c = 1.04 (1.24–1.56), 4v = 1.44 (1.68–2.14), 5x = 1.53 (1.45–1.85), ac = 11.33 (9.91–13.00), M = 0.50 (0.59–0.74), C3F = 0.69 (0.56–0.70).
Type materials. Holotype ♂ (SCAU, No. 125686, DNA #2172), CHINA: Mengdong, Cangyuan, Yunnan, 23°10'08''N, 99°13'52''E, alt. 1320m, 10.v.2016, ex tree trunk, Y.L. Wang. Paratypes: 2♂, 3♀ (SCAU, Nos. 125687– 91, DNA #2729), Muyiji Park, Ximeng, Yunnan, 22°37'13''N, 99°35'45''E, alt. 1100m, 30.iv.2016, ex tree trunks, J. Huang, Y.Q. Liu, Y.L. Wang, L. Zhu.
Distribution. China (Yunnan).
Etymology. From the Latin word " fuscus " (= brown), referring to the brown body color.
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 71, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657