Stegana (Steganina) cordhirsuta Wang & 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 : 60-61

Stegana (Steganina) cordhirsuta Wang & Chen , sp. nov.

( Figs. 6I, 6J , 31 )

Diagnosis. This species resembles S. (S.) sphaerica Wang, Gao, & Chen, 2013 in the shape of aedeagal sheath (as fig. 10E, F in Wang et al. 2013, Fig. 31C ), but can be distinguished from the latter by having the surstylus with 1 peg-like tooth near distal margin ( Fig. 31A ); the subepandrial sclerite slightly vaulted, deeply split medially and broadened laterally ( Fig. 31D ).

Description. Male and female: First flagellomere yellow on basal 1/3, black on distal 2/3. Clypeus brown medially, yellow laterally. Mesonotum mostly brownish, with 3 indistinct, longitudinal yellow stripes medially and sublaterally ( Fig. 6I ). Katepisternum mostly yellowish, brown on posterior corner ( Fig. 6J ). Scutellum mostly brownish, brown anteriorly and black along posterior margin ( Fig. 6I ). Halter mostly grey ( Fig. 6J ). Fore femur with a row of 5 or 6 long setae on distal part of posteroventral surface. Abdominal tergites mostly yellow, dark brown near distal margin, lacking pubescence ( Fig. 31A ). Cercus with much pubescence ( Fig. 31A ). Hypandrium roundly expanded anteromedially ( Fig. 31B ). Pregonite large, lacking sensillum ( Fig. 31B, C ). Aedeagus rounded distally, with much pubescence distoventrally ( Fig. 31B, C ). Aedeagal sheath distally dorsad curved and with some minute, serrated processes ( Fig. 31C ).

Measurements and indices. BL = 3.40 mm in holotype (2.97–3.27 in 5♂, 3.29 in 1♀ paratypes), ThL = 1.50 mm (1.37–1.70 in ♂, 1.80 in ♀), WL = 2.50 mm (1.90–2.50 in ♂, 3.07 in ♀), WW = 1.00 mm (1.03–1.20 in ♂, 1.10 in ♀), arb = 11/5 (11–13/4–6), avd = 0.90 (0.67–1.11), adf = 2.00 (1.50–3.00), flw = 2.40 (2.00–2.50), FW/HW = 0.32 (0.34–0.45), ch/o = 0.22 (0.14–0.29), prorb = 0.87 (1.46–1.88), rcorb = 0.40 (0.54–0.88), vb = 0.50 (0.33–0.67), dcl = 0.26 (0.32–0.50), presctl = 0.58 (0.53–0.67), sctl = 2.14 (1.73–2.50), sterno = 0.60 (0.56–0.71), orbito = 1.43 (1.67–2.50), dcp = 0.21 (0.18–0.23), sctlp = 2.00 (1.43–2.22), C = 2.03 (1.73–2.41), 4c = 1.25 (1.04–1.38), 4v = 2.06 (1.69–2.20), 5x = 1.57 (1.29–2.40), ac = 20.00 (14.50–22.00), M = 0.69 (0.51–0.75), C3F = 0.70 (0.68–0.80).

Type materials. Holotype ♂ ( SCAU, No. 121099, DNA #1042), CHINA: Wangtianshu, Mengla , Yunnan, 21°36'09''N, 101°35'06''E, alt. 660m, 21.iv.2007, ex tree trunk, H.W. Chen . Paratypes: 15♂, 1♀ ( SCAU, 121100– 08, 125579–85, DNA #1345, 1411), Yixiang, Pu'er , Yunnan, 22°44'19''N, 101°07'01''E, alt. 1420m, 14♂, 1♀ on 30.ix.2011, 1♂ on 9.v.2012, ex tree trunks, H.W. Chen, J.J. Gao.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words " cordatus " (= cord) and '' hirsutus '' (= hirsute), referring to the aedeagus medially with pubescence.

Figures

FIGURE 6. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) alafoliacea Zhang & Chen, sp. nov.; C, D. S. (S.) baoxing Li & Chen, sp. nov.; E, F. S. (S.) bimai Cui & Chen, sp. nov.; G, H. S. (S.) cinereipecta Zhang & Chen sp. nov.; I, J. S. (S.) cordhirsuta Wang & Chen, sp. nov.

FIGURE 31. Stegana (Steganina) cordhirsuta Wang & Chen, sp. nov., male terminalia.A. Epandrium, surstylus, and cercus in lateral view; B, C. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; D. Subepandrial sclerite in ventral view.