Stegana (Steganina) menghai Zhang & 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 menghai

description: Stegana (Steganina) menghai Zhang & Chen, sp. nov.
(Figs. 11E, 11F, 50)
Diagnosis. This species slightly resembles S. (S.) nigridentata sp. nov. in the shape of epandrium, surstylus, cercus (Figs. 50A, 55A), and subepandrial sclerite (Figs. 50F, 55F), but can be distinguished from the latter by having the small pregonite with 4 sensilla (Fig. 50B, C); the aedeagus with numerous minute, serrated processes distally (Fig. 50B, C); the aedeagal sheath distally cambered, not strongly expanded (Fig. 50D, E).
Description. Male and female: First flagellomere black. Clypeus yellow. Mesonotum broadly dark brown medially, brown laterally (Fig. 11E). Katepisternum mostly yellowish, brownish on anterior corner (Fig. 11F). Scutellum dark brown, yellow at tip (Fig. 11E). Halter mostly grey (Fig. 11F). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites black (Fig. 11E, F); sternites brown, about 2 times as wide as long. Male terminalia (Fig. 50): Epandrium with ca. 14 setae on dorsal to posterior portions per side (Fig. 50A). Surstylus with 1 peg-like tooth, several setulae, and some pubescence near distal margin (Fig. 50A). Cercus with much pubescence (Fig. 50A). Hypandrium roundly expanded anteromedially (Fig. 50B, C). Aedeagus roundly expanded distally, lacking pubescence (Fig. 50B, C). Aedeagal sheath with numerous minute, serrated processes distally (Fig. 50D, E). Subepandrial sclerite vaulted, roundly expanded dorsally (Fig. 50F).
Measurements and indices. BL = 3.00 mm in holotype (3.07 in 2♂, 2.93–3.67 in 5♀ paratypes), ThL = 1.47 mm (1.33 in ♂, 1.27–2.27 in ♀), WL = 2.00 mm (2.33 in ♂, 2.20–2.60 in ♀), WW = 1.00 mm (1.20 in ♂, 1.00– 1.27 in ♀), arb = 6/3 (7–8/3–5), avd = 0.89 (0.80–1.60), adf = 1.13 (0.63–1.25), flw = 1.63 (1.20–1.75), FW/HW = 0.38 (0.32–0.48), ch/o = 0.28 (0.24–0.40), prorb = 1.50 (0.71–1.25), rcorb = 0.80 (0.56–0.81), vb = 0.40 (0.27–0.36), dcl = 0.57 (0.32–0.57), presctl = 0.63 (0.50–0.71), sctl = 2.73 (1.43–3.50), sterno = 0.95 (0.65–0.87), orbito = 2.00 (2.00–2.50), dcp = 0.21 (0.20–0.34), sctlp = 2.00 (1.88–2.78), C = 1.90 (1.60–1.83), 4c = 1.25 (1.11–1.38), 4v = 1.88 (1.78–2.25), 5x = 2.00 (1.67–1.75), ac = 6.67 (6.50–12.00), M = 1.00 (0.56–0.88), C3F = 0.80 (0.67–0.82).
Type materials. Holotype ♂ (SCAU, No. 125641, DNA #1433), CHINA: Hesong, Menghai, Yunnan, 21°50'17''N, 100°05'48''E, alt. 1600m, 7.v.2012, ex tree trunk, H.W. Chen. Paratypes: 5♀ (SCAU, Nos. 125642–46, DNA #2657), other data same as holotype; 2♂, 1♀ (SCAU, Nos. 125647–49, DNA #2732), Botanic Garden, Ruili, Yunnan, 24°04'19''N, 97°49'08''E, alt. 1150m, 22.iv.2018, ex tree trunks, H.W. Chen.
Distribution. China (Yunnan).
Etymology. From the name of the type locality "Menghai".
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 84, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657