Stegana (Steganina) unguiculata Li & Zhang & Chen 2019, sp. nov.
Creators: name: Li, Bingxue
name: Zhang, Yuan
name: Chen, Hongwei
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana

description: Stegana (Steganina) unguiculata sp. nov.
(Figs 2H, 11)
Diagnosis. This species resembles S. linnanensis Cheng, Gao & Chen, 2009 from southern China in the colour patterns of body (Fig. 2H) and male terminalia (Fig. 11), but can be distinguished from it by the aedeagus nearly bilobed, with 7 pair of slender processes and thick, long pubescence laterally (Fig. 11C); gonopods with 1 suberect lobe-like process bearing several pubescence (Fig. 11D). However, the minimum interspecific genetic distance is 3.3% to S. hirtifoliacea (Table 2).
Description. Male and Female: Pedicel brown medially, black laterally; first flagellomere nearly black. Palpus yellow basally, brown on distal 1/ 3 in male, brown on distal 2/ 3 in female. Mesonotum dark brown medially, brown laterally (Fig. 2H). Katepisternum dark brown on upper part, white-yellow on lower part (Fig. 2H). Scutellum black (Fig. 2H). Legs dark brown to black, yellow on basal part of fore femora and 2nd to 5th tarsomeres. Fore femur with 3 long setae on distal half of posteroventral surface. All abdominal tergites brown (Fig. 2H); all sternites yellowish brown. Male terminalia (Fig. 11 A–E): Epandrium with approximately 22 setae near posterior portion per side. Surstylus broad in lateral view. Cercus lacking pubescence. Tenth sternite with 1 pair of asymmetric projection sublaterally. Plate between hypandrium and aedeagus with 4 sensilla. Aedeagus composed of 1 bilobed medial process with pubescence. Female terminalia (Fig. 11 F–H): Epiproct and cercus with setae, lacking pubescence. Hypoproct pubescent medially, with dense setae along lateral and posterior margins. Eighth sternite glabrous, with a pair of small setae near posterior margin.
Measurements. BL = 2.83 mm in holotype (mm in five ♂ and five ♀ paratypes: 2.37–2.83 in ♂, 2.87–3.27 in ♀), ThL = 1.17 mm (1.20–1.30 in ♂, 1.20–1.47 in ♀), WL = 1.83 mm (1.93–2.17 in ♂, 2.00– 2.23 in ♀), WW = 1.00 mm (1.00– 1.10 in ♂, 1.07–1.17 in ♀), arb = 7/5 (7–9/5–6), avd = 0.90 (0.60–0.92), adf = 1.67 (1.11–1.83), flw = 2.17 (1.57–2.50), FW/HW = 0.46 (0.34–0.44), ch/o = 0.10 (0.09–0.16), prorb = 0.94 (1.00–1.27), rcorb = 0.59 (0.60–0.91), vb = 0.29 (0.18–0.31), dc1 = damaged (0.31–0.48), presctl = damaged (0.55–0.71), sct1 = 2.00 (1.40– 1.90), sterno = 1.00 (0.85–1.25), orbito = 2.25 (1.67–2.50), dcp = 0.29 (0.17–0.36), sct1p = 1.30 (1.09–1.42), C = 1.89 (1.71–2.06), 4c = 1.20 (1.00–1.29), 4v = 1.60 (1.50–1.81), 5x = 1.50 (1.18–1.54), ac = 9.00 (7.00–10.05), M = 0.60 (0.43–0.67), C3F = 0.39 (0.50–0.74).
Specimens examined. Holotype: ♂ (SCAU, No. 111477), China: Qimaba, Lüchun, Yunnan, 22°49'8''N, 102°17'25''E, altitude 1280m, 3,4. viii.2016, tree trunk, HW Chen. Paratypes: China: 3♂, 7♀ (SCAU, Nos 111478 – 7), same data as holotype, HW Chen, L Gong, YQ Liu; 1♀ (SCAU, No. 111488), Dashuigou, Lühun, Yunnan, 22°57'19''N, 101°57'4''E, altitude 1310m, 2.viii.2016, tree trunk, HW Chen; 1♂, 1♀ (SCAU, Nos 111540, 41), Jinshan Forest Park, Menglian, Yunnan, 22°20'6''N, 99°34'34''E, altitude 1049m, 24.x.2017, tree trunks, HW Chen, L Gong; 1♂, 1♀ (KIZ, Nos 0 0 90663, 64), Moli Forest Park, Ruili, Yunnan, 24°7'5''N, 97°58'51''E, altitude 920m, 5.xi.2017, tree trunks, HW Chen, L Gong; 1♀ (SCAU, No. 124146), Beibeng, Motuo, Xizang, 29°19'N, 95°20'E, altitude 800m, 29.ix.2010, tree trunk, L Wang.
Etymology. From the Latin word: unguiculus, referring to the aedeagus with claw-shape processes. Distribution. China (Yunnan, Xizang).
description: Published as part of Li, Bingxue, Zhang, Yuan & Chen, Hongwei, 2019, Nine new species of the subgenus Stegana (Steganina) from China, with DNA barcoding information (Diptera: Drosophilidae), pp. 81-108 in Zootaxa 4576 (1) on pages 100-102, DOI: 10.11646/zootaxa.4576.1.4, http://zenodo.org/record/2624686