Stegana (Steganina) bibarbata Li & 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 : 44

publication ID	https://doi.org/10.11646/zootaxa.5250.1.1
publication LSID	lsid:zoobank.org:pub:4729EAF3-8B78-4AAD-B373-9179D008F239
DOI	https://doi.org/10.5281/zenodo.7705528
persistent identifier	https://treatment.plazi.org/id/0393914C-2A09-8753-C282-FC656B54FC01
treatment provided by	Plazi (2023-03-07 08:36:00, last updated 2024-11-28 17:29:29)
scientific name	Stegana (Steganina) bibarbata Li & Chen
status	sp. nov.

Treatment

Stegana (Steganina) bibarbata Li & Chen View in CoL , sp. nov.

( Figs. 4G, 4H View FIGURE 1-4 , 19 View FIGURE 19 )

Diagnosis. This species differs from the other species of the nigrolimbata species group in having the yellow body color ( Fig. 4G, H View FIGURE 1-4 ); the surstylus slightly triangular, lacking scale-like process ( Fig. 19A, B View FIGURE 19 ); the aedeagal sheath not expanded distolaterally, with some minute, serrated processes ( Fig. 19E, F View FIGURE 19 ).

Description. Male: Frons yellowish brown, lacking black band. First flagellomere yellow. Face black, with 1 yellow band medially. Clypeus black medially, yellow laterally. Palpus yellow basally, dark brown distally. Gena narrow and yellow. Mesonotum and scutellum mostly yellow ( Fig. 4G View FIGURE 1-4 ). Katepisternum yellowish above, brownish below ( Fig. 4H View FIGURE 1-4 ). Halter brownish basally, grey distally ( Fig. 4H View FIGURE 1-4 ). Fore femur with 4 thin, long setae on distal part of posteroventral surface. Abdominal tergites yellow ( Fig. 4G, H View FIGURE 1-4 ); sternites brownish, slightly wider than long. Male terminalia ( Fig. 19 View FIGURE 19 ): Epandrium with ca. 28 setae on dorsal to posterolateral portions per side ( Fig. 19A View FIGURE 19 ). Surstylus with numerous setae near margin, lacking pubescence ( Fig. 19A, B View FIGURE 19 ). Cercus lacking pubescence ( Fig. 19A View FIGURE 19 ). Hypandrium expanded anteromedially ( Fig. 19C, D View FIGURE 19 ). Pregonite blurry or absent ( Fig. 19C, D View FIGURE 19 ). Aedeagus with much pubescence basally ( Fig. 19C, D View FIGURE 19 ). Phallapodeme (aedeagal apodeme in McAlpine 1981) podgy ( Fig. 19C, D View FIGURE 19 ).

Measurements and indices. BL = 2.93 mm in holotype, ThL = 1.46 mm, WL = 2.64 mm, WW = 1.28 mm, arb = 6/3, avd = 0.67, adf = 1.31, flw = 1.95, FW/HW = 0.36, ch/o = 0.10, prorb = 0.32, rcorb = 0.75, vb = 0.49, dcl = 0.61, presctl = 0.50, sctl = 1.17, sterno = 0.71, orbito = 1.58, dcp = 0.29, sctlp = 1.50, C = 1.78, 4c = 1.15, 4v = 1.55, 5x = 0.95, ac = 10.20, M = 0.44, C3F = 0.65.

Type material. Holotype ♂ ( SCAU, No. 125407, DNA #2460), CHINA: Husa, Longchuan , Yunnan, 24°28'21''N, 97°54'06''E, alt. 1340m, ex tree trunk, 7.xi.2017, H.W. Chen. GoogleMaps

Distribution. China (Yunnan).

Etymology. A combination of the Latin words " bi -" (= two) and " barbatus " (= beard), referring to the pair of long, filar processes of aedeagus.

References

McAlpine, J. F. (1981) Morphology and terminology - adults. In: McAlpine, J. F., Peterson, B. V., Shewell, G. E., Teskey, H. J.,

Figures

FIGURE 19. Stegana (Steganina) bibarbata Li & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in lateral view; C, D. Hypandrium, aedeagus, and phallapodeme in ventral and lateral views; E, F. Aedeagal sheath 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.