Stegana (Steganina) silvestrella Zhang & Chen

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), Zootaxa 5250 (1), pp. 1-109 : 96-98

publication ID	https://doi.org/10.11646/zootaxa.5250.1.1
publication LSID	lsid:zoobank.org:pub:4729EAF3-8B78-4AAD-B373-9179D008F239
persistent identifier	https://treatment.plazi.org/id/0393914C-2A7D-8719-C282-F8EA6C41FA5E
treatment provided by	Plazi (2023-03-07 08:36:00, last updated 2023-03-07 16:16:30)
scientific name	Stegana (Steganina) silvestrella Zhang & Chen
status	sp. nov.

Treatment

Stegana (Steganina) silvestrella Zhang & Chen , sp. nov.

( Figs. 13G, 13H View FIGURE 13 , 61 View FIGURE 61 )

be distinguished from the latter by having the pregonite blurry or absent ( Fig. 61C, D View FIGURE 61 ); the aedeagus with numerous minute, serrated processes distally ( Fig. 61C, D View FIGURE 61 ).

Description. Male and female: First flagellomere yellow. Clypeus yellow. Mesonotum brown medially, brownish yellow laterally ( Fig. 13G View FIGURE 13 ). Katepisternum yellowish ( Fig. 13H View FIGURE 13 ). Scutellum dark brown in male, brownish yellow in female, black near distal margin ( Fig. 13G View FIGURE 13 ). Halter mostly yellowish ( Fig. 13H View FIGURE 13 ). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites brown medially, yellow laterally ( Fig. 13G, H View FIGURE 13 ); sternites yellow, about 1.8 times as wide as long. Male terminalia ( Fig. 61 View FIGURE 61 ): Epandrium with ca. 9 setae on dorsal to posterior portions per side ( Fig. 61A View FIGURE 61 ). Surstylus with some setulae near distal margin, lacking serrated processes and pubescence ( Fig. 61A, B View FIGURE 61 ). Cercus with much pubescence ( Fig. 61A View FIGURE 61 ). Hypandrium roundly expanded anteromedially ( Fig. 61C, D View FIGURE 61 ). Aedeagus tubular, distally expanded and rounded, lacking pubescence ( Fig. 61C, D View FIGURE 61 ). Aedeagal sheath lacking serrated process ( Fig. 61C, D View FIGURE 61 ). Subepandrial sclerite slightly half-rounded ( Fig. 61G View FIGURE 61 ).

Measurements and indices. BL = 2.63 mm in holotype (2.80–3.40 in 2♀ paratypes), ThL = 1.33 mm (1.33 in ♀), WL = 2.13 mm (2.00– 2.47 in ♀), WW = 1.00 mm (1.00– 1.13 in ♀), arb = 4/3 (4–5/3–4), avd = 1.00 (0.80–1.14), adf = 1.25 (1.00–1.40), flw = 2.42 (2.01–2.50), FW/HW = 0.45 (0.39–0.53), ch/o = 0.09 (0.08–0.11), prorb = 1.38 (0.83–1.33), rcorb = 0.75 (0.50–0.78), vb = 0.67 (0.60–0.80), dcl = 0.46 (0.46–0.48), presctl = 0.72 (0.70–0.82), sctl = 2.34 (2.11–2.50), sterno = 0.80 (0.60–1.11), orbito = 2.67 (2.12–2.67), dcp = 0.28 (0.25–0.28), sctlp = 1.86 (1.75–2.50), C = 1.67 (1.56–2.00), 4c = 1.29 (1.13–1.50), 4v = 1.91 (1.43–2.01), 5x = 2.43 (2.01–2.60), ac = 10.02 101°35'06''E, alt. 700m, 25.iv.2007, ex tree trunk, H.W. Chen. Paratypes: 2♀ (SCAU, Nos. 125658, 59, DNA #2562),

Mengdong, Cangyuan, Yunnan, 23°10'08''N, 99°13'52''E, alt. 1320m, 10.v.2016, ex tree trunks, J. Huang, Y.L. Wang. Distribution. China (Yunnan). Etymology. From the Latin word " silvestris " (= arboreal), referring to the arboreal Steganina flies GoogleMaps .

Figures

FIGURE 13. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) rava Cui & Chen, sp. nov.; C, D. S. (S.) sciophila Li & Chen, sp. nov.; E, F. S. (S.) septencolorata Li & Chen, sp. nov.; G, H. S. (S.) silvestrella Zhang & Chen, sp. nov.; I, J. S. (S.) simola Cui & Chen, sp. nov.

FIGURE 61. Stegana (Steganina) silvestrella Zhang & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, aedeagus, and phallapodeme in ventral and lateral views; E, F. Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view.