Stegana (Steganina) serrata 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 : 41-42

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.7706307
persistent identifier	https://treatment.plazi.org/id/0393914C-2A0A-8751-C282-FAA66852F9C6
treatment provided by	Plazi (2023-03-07 08:36:00, last updated 2024-11-28 17:29:29)
scientific name	Stegana (Steganina) serrata Zhang & Chen
status	sp. nov.

Treatment

Stegana (Steganina) serrata Zhang & Chen View in CoL , sp. nov.

( Figs. 4C, 4D View FIGURE 1-4 , 17 View FIGURE 17 )

Diagnosis. This species differs from the other species of the castanea group in having the aedeagus distomedially with some minute, serrated processes and apically with much pubescence ( Fig. 17B, C View FIGURE 17 ).

Description. Male and female: First flagellomere black. Clypeus yellow. Mesonotum brown, with 1 broad, longitudinal dark brown stripe medially ( Fig. 4C View FIGURE 1-4 ). Katepisternum yellowish ( Fig. 4D View FIGURE 1-4 ). Scutellum mostly brown, dark brown anteromedially, and brownish apically ( Fig. 4C View FIGURE 1-4 ). Fore femur with a row of 5 or 6 long setae on distal part of posteroventral surface. Halter grey ( Fig. 4C View FIGURE 1-4 ). Abdominal tergites dark brown to black ( Fig. 4C, D View FIGURE 1-4 ); sternites brown, about 2 times as wide as long. Male terminalia ( Fig. 17 View FIGURE 17 ): Epandrium with ca. 14 setae on dorsal to posterior portions per side ( Fig. 17A View FIGURE 17 ). Surstylus slightly squared, with several minute, serrated processes on outer surface and several setulae along outer margin ( Fig. 17A View FIGURE 17 ). Cercus with much pubescence ( Fig. 17A View FIGURE 17 ). Hypandrium expanded anteromedially ( Fig. 17B, C View FIGURE 17 ). Pregonite with 2 sensilla ( Fig. 17B, C View FIGURE 17 ). Aedeagal sheath nearly erect, slightly dorsad curved, mostly with numerous minute, serrated processes ( Fig. 17C, D View FIGURE 17 ). Subepandrial sclerite deeply split medially ( Fig. 17E View FIGURE 17 ).

Measurements and indices. BL = 3.87 mm in holotype (3.14–3.54 in 5♂, 3.33–4.27 in 5♀ paratypes), ThL = 1.67 mm (1.49–1.67 in ♂, 1.60–1.73 in ♀), WL = 2.67 mm (2.33–3.28 in ♂, 2.33–3.34 in ♀), WW = 1.33 mm (1.05–1.28 in ♂, 1.12–2.07 in ♀), arb = 11/7 (8–11/5–6), avd = 0.85 (0.76–1.17), adf = 1.86 (0.85–2.00), flw = 2.00 (1.50–2.39), FW/HW = 0.45 (0.33–1.46), ch/o = 0.31 (0.19–0.31), prorb = 1.40 (0.97–1.77), rcorb = 0.80 (0.51–0.85), orbito = 1.43 (1.60–2.40), vb = 0.60 (0.29–1.03), sctl = 2.00 (1.36–2.48), sterno = 0.65 (0.64–0.89), sctlp = 1.50 (1.33–1.89), C = 1.90 (1.80–2.15), 4c = 1.05 (1.00–1.26), 4v = 1.75 (1.67–2.00), 5x = 1.25 (1.17–1.88), ac = 10.50 (9.64–14.67), M = 0.50 (0.53–0.70), C3F = 0.76 (0.63–0.85).

Type materials. Holotype ♂ ( SCAU, No. 125242, DNA #1342), CHINA: Menglun, Mengla , Yunnan, 21°47'29''N, 101°22'59''E, alt. 680m, 26–28.ix.2011, ex tree trunk, H.W. Chen GoogleMaps . Paratypes: 3♂, 2♀ ( SCAU, Nos. 125246–50, DNA #2642), 16–19.iv.2007, 1♂, 2♀ ( SCAU, Nos. 125251–53), 26–28.ix.2011, H.W. Chen, J.J. Gao, other data same as holotype; GoogleMaps 2♂, 1♀ ( SCAU, Nos. 125254–56, DNA #2195), Guanlei, Mengla, Yunnan, 21°38'39''N, 101°09'52''E, alt. 560m, 24.iv.2016, ex tree trunks, Y.L. Wang, L. Zhu; GoogleMaps 1♂ ( SCAU, No. 125243, DNA #2605), Longtan Forest Park, Guiping, Guangxi, 23°32'28''N, 110°00'34''E, alt. 1145m, 2.vii.2017, ex tree trunk, H.W. Chen; GoogleMaps 1♂ ( SCAU, No. 125244, DNA #2749), Longtan Park , Ximeng , Yunnan, 22°38'55''N, 99°36'02''E, alt. 1150m, 17.iv.2018, ex tree trunk, B.X. Li GoogleMaps ; 1♀ ( SCAU, No. 125245, DNA #2715), Nonggang, Longzhou , Guangxi, 22°32'26''N, 106°43'18''E, alt. 230m, 28.xi.2019, ex tree trunk, H.W. Chen. GoogleMaps

Distribution. China (Guangxi, Yunnan).

Etymology. From the Latin word " erratus " (= serrate), referring to the aedeagus medially with minute, serrated processes.

Figures

FIGURE 17. Stegana (Steganina) serrata Zhang & 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. Aedeagal sheath in ventral view; E. Subepandrial sclerite 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.