Stegana (Steganina) biflava, 2019

Li, Bingxue, Zhang, Yuan & Chen, Hongwei, 2019, Nine new species of the subgenus Stegana (Steganina) from China, with DNA barcoding information (Diptera: Drosophilidae), Zootaxa 4576 (1), pp. 81-108 : 102

publication ID	https://doi.org/ 10.11646/zootaxa.4576.1.4
publication LSID	lsid:zoobank.org:pub:A521DFD3-564F-4A15-8F59-9E946F169C4A
DOI	https://doi.org/10.5281/zenodo.5334834
persistent identifier	https://treatment.plazi.org/id/D32C2E17-CE94-49EF-985B-92746CDF4A9A
taxon LSID	lsid:zoobank.org:act:D32C2E17-CE94-49EF-985B-92746CDF4A9A
treatment provided by	Plazi
scientific name	Stegana (Steganina) biflava
status	sp. nov.

Treatment

Stegana (Steganina) biflava View in CoL sp. nov.

( Figs 2I View FIGURE 2 , 12 View FIGURE 12 )

Diagnosis. This species resembles S. flavichypeata Chen & Chen in Lu et al. 2011a in the yellow clypeus and palpus, and colour patterns of body ( Fig. 2I View FIGURE 2 ), but can be distinguished by having the face black on upper 2/3, yellow on lower 1/3; aedeagus with triangular opening in ventral view ( Fig. 12B View FIGURE 12 ). In S. flavichypeata : Face black, with yellow band medially; aedeagus with rhombic opening in ventral view (fig. 24 in Lu et al. 2011a). The minimum interspecific genetic distance to P. flavichypeata is 7.1%, which is smaller than to other species in this group ( Table 2).

Description. Male and female. Frons black, with orange yellow stripe medially and band submedially. First flagellomere medially grayish yellow on basal half, black on distal half. Mesonotum black, with thin, yellow longitudinal stripes sublaterally ( Fig. 2I View FIGURE 2 ). Katepisternum entirely white ( Fig. 2I View FIGURE 2 ). Scutellum black, yellow at tip ( Fig. 2I View FIGURE 2 ). Veins R 4+5 and M 1 lacking setae on basal section of dorsal surface. Legs white on basal half of all femora, brown on distal 1/3 of foreleg femur, black on distal half of femora and basal half of tibiae of mid and hindleg, yellow on the rest. Fore femur distally with 3 or 4 setae on posteroventral surface. Abdominal tergites 1st to 5th medially brown, laterally yellowish brown, nearly black on 6th tergite in male; all tergites black in female. Sternites yellow to brownish yellow. Male terminalia ( Fig. 12 View FIGURE 12 A–F): Hypandrium anteromedially slightly elongated, about 1.2 times as long as width of epandrium, with a few paramedian setae posteroventrally. Gonopods slightly triangular. Aedeagus slightly expanded distally in ventral view, about 3/5 times as long as aedeagal apodeme. Female terminalia ( Fig. 12 View FIGURE 12 G–I): Epiproct, cercus and hypoproct with dense setae and pubescence. Eighth sternite glabrous on anterior 2/3 region, with dense setae and pubescence on posterior 1/3 region.

Measurements. BL = 3.60 mm in holotype (mm in 2♂ and 3♀ paratypes: 3.67–4.13 in ♂, 4.00– 4.13 in ♀), ThL = 1.73 mm (1.53–2.33 in ♂, 1.87–2.07 in ♀), WL = 3.00 mm (2.80–3.47 in ♂, 3.00– 3.87 in ♀), WW = 1.53 mm (1.40–1.87 in ♂, 1.33–1.60 in ♀), arb = 4/2 (7–8/3–5), avd = 0.50 (0.33–0.89), adf = 2.40 (1.50–1.88), flw = 1.60 (1.40–2.40), FW/HW = 0.51 (0.40–0.50), ch/o = 0.17 (0.16–0.33), prorb = 0.93 (0.82–1.42), rcorb = 0.71 (0.70–1.00), orbito = 1.80 (2.20–3.00), vb = 0.75 (0.18–0.80), sctl = 1.60 (1.25–1.60), sterno = 0.67 (0.50–0.89), sctlp = 1.45 (1.27–1.83), C = 1.92 (1.25–2.00), 4c = 1.50 (1.08–1.40), 4v = 2.38 (1.10–2.00), 5x = 1.50 (1.25– 2.00), ac = 6.00 (6.50–12.00), M = 0.75 (0.50–0.80), C3F = 0.67 (0.67–0.79).

Specimens examined. Holotype ♂ ( SCAU, No. 111533), China: Mulun, Huanjiang , Guangxi, 25°07'N, 108°02'E, altitude 480m, 16.ix.2015, tree trunk, YQ Liu GoogleMaps . Paratypes: China: 2♀ ( SCAU, Nos 111534, 35), same data as holotype GoogleMaps ; 1♂ ( KIZ, No. 0090669), Qimaba, Lühun , Yunnan, 22°49'8''N, 102°17'25''E, altitude 1280m, 3.viii.2016, tree trunk, HW Chen GoogleMaps ; 1♂ ( KIZ, No. 0090670), Yakou, Huanglianshan , Lühun , Yunnan, 22°53'40''N, 102°18'17''E, altitude 1900m, 31.x.2016, tree trunk, HW Chen GoogleMaps ; 2♂, 1♀ ( SCAU, Nos 111536 –38), Wengang, Libo , Guizhou, 25°13'N, 107°56'E, altitude 754m, 19.ix.2015, tree trunks, YQ Liu, Y Zhang, L Zhu GoogleMaps .