Stegana (Steganina) flabella 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 flabella

description: Stegana (Steganina) flabella Li & Chen, sp. nov.
(Figs. 8C, 8D, 37)
Diagnosis. This species closely resembles S. (S.) euryphylla Chen & Chen, 2009 in the shape of male terminalia (as figs. 14–20 in Chen & Chen 2009, Fig. 37), but can be distinguished from the latter by having the aedeagus distomedially and subdistolaterally lacking much pubescence (Fig. 37).
Description. Male and female: First flagellomere black. Clypeus yellow. Mesonotum brown to dark brown medially, yellow to brownish laterally (Fig. 8C). Katepisternum yellowish (Fig. 8D). Scutellum dark brown (Fig. 8C). Halter mostly brownish (Fig. 8D). Fore femur with 3 or 4 long setae on distal part of posteroventral surface. Abdominal tergites dark brown to black (Fig. 8C, D); sternites brown, slightly wider than long. Male terminalia (Fig. 37): Epandrium with ca. 11 setae on dorsal to posterior portions per side (Fig. 37A). Surstylus with minute, serrated processes and numerous setulae on outer surface, 1 peg-like tooth near distal margin (Fig. 37A, B). Cercus lacking pubescence (Fig. 37A). Hypandrium expanded anteromedially (Fig. 37C, D). Pregonite small, with 3 sensilla (Fig. 37C, D). Aedeagus distally broadened and with numerous minute, serrated processes, with a row of serrated processes laterally and some pubescence distoventrally (Fig. 37C, D). Aedeagal sheath distally dorsad curved and with several minute, serrated processes (Fig. 37E, F). Subepandrial sclerite rounded distally (Fig. 37G).
Measurements and indices. BL = 2.37 mm in holotype (2.19–2.39 in 3♂, 2.34–2.41 in 3♀ paratypes), ThL = 1.09 mm (1.09–1.12 in ♂, 0.95–1.21 in ♀), WL = 2.12 mm (2.03–2.13 in ♂, 1.91–2.32 in ♀), WW = 0.95 mm (0.87–0.97 in ♂, 0.84–1.01 in ♀), arb = 6/4 (6–7/4–5), avd = 0.71 (0.71–0.86), adf = 1.46 (1.05–1.34), flw = 1.85 (1.67–2.05), FW/HW = 0.44 (0.38–0.42), ch/o = 0.32 (0.25–0.38), prorb = 0.83 (0.68–1.32), rcorb = 0.67 (0.59– 0.92), vb = 0.51 (0.50–0.71), dcl = 0.76 (0.53–0.81), presctl = 0.65 (0.55–0.78), sctl = 1.96 (1.61–2.13), sterno = 0.71 (0.55–1.39), orbito = 2.00 (1.50–2.08), dcp = 0.29 (0.27–0.42), sctlp = 1.39 (1.39–1.82), C = 1.99 (1.71–2.13), 4c = 1.25 (1.00–1.59), 4v = 2.25 (1.57–2.37), 5x = 1.34 (1.32–1.75), ac = 8.44 (8.87–12.29), M = 0.71 (0.59–0.96), C3F = 0.60 (0.47–0.61).
Type materials. Holotype ♂ (SCAU, No. 125710, DNA #2659), CHINA: Wangtianshu, Mengla, Yunnan, 21°36'09''N, 101°35'06''E, alt. 670m, 25.iv.2017, ex tree trunk, H.W. Chen. Paratypes: 3♂, 3♀ (SCAU, Nos. 125711–16, DNA #2691), other data same as holotype.
Distribution. China (Yunnan).
Etymology. From the Latin word " flabellum " (= knife), referring to the distally broadened 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 68-69, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657