Stegana (Steganina) latifoliacea 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 : 80

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

( Figs. 10G, 10H , 47 )

Diagnosis. This species is similar to S. (S.) cucullata sp. nov. in the shape of male terminalia ( Figs. 34 , 47 ), but can be distinguished from the latter by having the mesonotum brownish yellow ( Fig. 10G ); the pregonite blurry or absent ( Fig. 47C, D ).

Description. Male and female: First flagellomere yellow on basal 1/3, brownish on distal 2/3. Clypeus yellow. Katepisternum yellowish ( Fig. 10H ). Scutellum brownish to dark brown ( Fig. 10G ). Halter mostly grey ( Fig. 10H ). Fore femur with a row of 4 setae on distal part of posteroventral surface. Abdominal tergites dark brown medially, brownish laterally in male ( Fig. 10G, H ), mostly dark brown in female; sternites brownish, slightly wider than long. Male terminalia ( Fig. 47 ): Epandrium with ca. 14 setae on dorsal to posterior portions per side ( Fig. 47A ). Surstylus with 1 peg-like tooth and several setulae near distal margin, lacking pubescence ( Fig. 47A, B ). Cercus with much pubescence ( Fig. 47A ). Hypandrium roundly expanded anteromedially ( Fig. 47C, D ). Aedeagus dramatically expanded distally, with some pubescence distoventrally ( Fig. 47C, D ). Aedeagal sheath distally dorsad curved and with several minute, serrated processes ( Fig. 47E, F ). Subepandrial sclerite slightly vaulted ( Fig. 47G ).

Measurements and indices. BL = 2.67 mm in holotype (2.54–2.95 in 5♂, 2.79–3.05 in 5♀ paratypes), ThL = 1.30 mm (1.26–1.51 in ♂, 1.19–1.36 in ♀), WL = 1.51 mm (2.14–2.61 in ♂, 2.19–2.64 in ♀), WW = 0.80 mm (0.94–1.14 in ♂, 0.97–1.04 in ♀), arb = 10/6 (7–9/5–7), avd = 1.00 (0.73–0.94), adf = 1.00 (1.00–1.53), flw = 2.29 (1.65–2.29), FW/HW = 0.31 (0.34–0.39), ch/o = 0.14 (0.26–0.34), prorb = 1.25 (0.68–1.34), rcorb = 0.83 (0.71– 1.02), vb = 0.67 (0.63–0.90), dcl = 0.19 (0.38–0.71), presctl = 0.38 (0.43–0.78), sctl = 1.93 (1.65–2.09), sterno = 0.55 (0.62–1.23), orbito = 2.00 (1.56–1.96), dcp = 0.21 (0.27–0.36), sctlp = 1.90 (1.45–1.90), C = 1.83 (1.48–1.91), 4c = 1.21 (1.06–1.29), 4v = 2.00 (1.48–1.86), 5x = 1.13 (1.23–1.74), ac = 11.50 (9.00–14.57), M = 0.47 (0.54–0.72), C3F = 0.63 (0.53–0.68).

Type materials. Holotype ♂ ( SCAU, No. 125614, DNA #002), CHINA: Menglun, Mengla , Yunnan, 21°47'29''N, 101°22'59''E, alt. 600m, 16.iv.2007, ex tree trunk, H.W. Chen . Paratypes: 9♂, 5♀ ( SCAU, Nos. 125615–28, DNA #1439, 1936), Wangtianshu, Mengla , Yunnan, 21°36'09''N, 101°35'06''E, alt. 660m, 22–25.iv.2007, ex tree trunks, H.W. Chen, J.J. Gao.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words " latus " (= broad) and " foliaceus " (= foliaceous), referring to the distally expanded aedeagus.

Figures

FIGURE 10. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) kanda sp. nov.; C, D. S. (S.) labao Cui & Chen, sp. nov.; E, F. S. (S.) lancang Li & Chen, sp. nov.; G, H. S. (S.) latifoliacea Wang & Chen, sp. nov.; I, J. S. (S.) liusanjieae Li & Chen, sp. nov.

FIGURE 34. Stegana (Steganina) cultella Cui & Chen, sp. nov., male terminalia.A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; E, F. Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view.

FIGURE 47. Stegana (Steganina) latifoliacea Wang & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; E, F. Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view.