Stegana (Steganina) cardua Cui & 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 : 46-47

Stegana (Steganina) cardua Cui & Chen , sp. nov.

( Figs. 4I, 4J , 20D–F )

Diagnosis. This species differs from the other species of the ornatipes species group in having the large body size (BL ranged from 3.32–3.94 mm in measured specimens); the first flagellomere yellowish; the palpus brownish yellow; the hypoproct with dense thick setae along anterior margin ( Fig. 20F ).

Description. Female: Frons brown, with 1 thin, yellow longitudinal stripe medially. Face brown, with yellow band medially; facial carina absent. Clypeus brown. Mesonotum brown, with 5 yellow longitudinal stripes ( Fig. 4I ). Scutellum dark brown ( Fig. 4I ). Katepisternum yellowish ( Fig. 4J ). Halter mostly grey ( Fig. 4J ). Fore femur with 3 or 4 long setae on distal part of posteroventral surface. Abdominal tergites mostly dark brown ( Fig. 4I, J ); sternites yellowish, about 2 times as wide as long. Female terminalia ( Fig. 20D–F ): Epiproct with several setae, lacking pubescence ( Fig. 20D ). Cercus with numerous setae, lacking pubescence ( Fig. 20D ). Eighth sternite about 2.5 times as wide as long, glabrous on basal 1/2 portion, with numerous prensisetae near posterior margin ( Fig. 20E ). Hypoproct with numerous setae and much pubescence ( Fig. 20F ).

Measurements and indices. BL = 3.87 mm in holotype (3.32–3.94 in 3♀ paratypes), ThL = 1.94 mm (1.57– 1.96), WL = 3.99 mm (3.33–4.12), WW = 1.87 mm (1.40–1.81), arb = 9/6 (7–8/5), avd = 0.74 (0.77–0.90), adf = 1.92 (1.38–1.51), flw = 3.56 (2.64–3.12), FW/HW = 0.26 (0.27–0.31), ch/o = 0.07 (0.06–0.08), prorb = 0.79 (0.71– 0.94), rcorb = 0.70 (0.56–0.75), vb = 0.84 (0.59–0.75), dcl = 0.50 (0.39–0.52), presctl = 0.56 (0.55–0.73), sctl = 2.11 (1.36–1.72), sterno = 0.65 (0.64–0.88), orbito = 1.52 (1.56–1.80), dcp = 0.29 (0.29–0.32), sctlp = 1.10 (1.03–1.10), C = 1.61 (1.83–2.13), 4c = 1.39 (1.16–1.31), 4v = 1.86 (1.73–1.90), 5x = 1.50 (1.18–1.62), ac = 9.88 (7.00–8.56), M = 0.68 (0.51–0.69), C3F = 0.55 (0.62–0.68), A = 1.69 (1.64–1.87), H = 0.48 (0.32–0.33).

Type materials. Holotype ♀ ( SCAU, Nos.125749, DNA #2327), CHINA: Wanba, Jiulong , Sichuan, 29°04'22''N, 102°02'44''E, alt. 2470m, 5.vii.2017, ex tussock, L. Gong . Paratypes: 3♀ ( SCAU, Nos. 125750–52, DNA #2755, 2756), Y. Lin, N.N. Wang, Y.L. Wang, other data same as holotype.

Distribution. China (Sichuan).

Etymology. From the Greek word " carduus " (= thistle), referring to the numerous prensisetae on the 8th sternite.

Figures

FIGURE 20. Female terminalia in Stegana (Steganina) nigripes Zhang & Chen, 2015 (A–C) from Botanic Garden, Ruili, Yunnan, S. (S.) cardua Cui & Chen, sp. nov. (D–F), and S. (S.) nigripalpula Cui & Chen, sp. nov. (G–I). A, D. G. Epiproct and cercus in dorsal view; B, E. H. Eighth sternite in ventral view; C, F, I. Hypoproct in ventral view.

FIGURE 1-4. An un-rooted, neighbor-joining (NJ) tree constructed using 435 DNA barcode sequences of 102 Steganina species. Numbers around the nodes are bootstrap percentages (BPs). BPs lower than 50 are not shown. The bars indicate the estimated number of substitutions per site.