Stegana (Orthostegana) pinguitia Peng & Chen, 2023

Wang, Ya-Lian, Peng, Zi-Qi, Jin, Feng-Liang, Chen, Hong-Wei & Huang, Jia, 2023, Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae), Arthropod Systematics & amp; Phylogeny 81, pp. 581-610 : 581

publication ID	https://dx.doi.org/10.3897/asp.81.e102683
publication LSID	lsid:zoobank.org:pub:CA56E9F0-B426-4014-B20B-D7C455FD65A7
persistent identifier	https://treatment.plazi.org/id/562B4B37-F5EA-4D06-9CCF-533C85805C52
taxon LSID	lsid:zoobank.org:act:562B4B37-F5EA-4D06-9CCF-533C85805C52
treatment provided by	Arthropod Systematics & Phylogeny by Pensoft
scientific name	Stegana (Orthostegana) pinguitia Peng & Chen
status	sp. nov.

Treatment

3.2.1.9. Stegana (Orthostegana) pinguitia Peng & Chen sp. nov.

Figs 8G View Figure 8 , 8H View Figure 8 , 10E View Figure 10 , 20 View Figure 20

Diagnosis.

This species closely resembles S. (O.) macro -stephana sp. nov. in the aedeagus medioventrally and distally with dense long hairs (Figs 17C View Figure 17 , 17D View Figure 17 , 20C View Figure 20 , 20D View Figure 20 ), but can be distinguished from the latter by having the mesotarsus ventrally with 2 rows of black, apically blunt, stout spines; metatarsus with 12/1/7+1 spines; 2nd to 4th segments with 5/1, 3/1, and 2/1 spines, respectively (Fig. 10E View Figure 10 ); pregonites large and expanded distally, lacking sensillum, with ca. 2 setae distally per side (Fig. 20C, D View Figure 20 ).

Description.

Male. Head: Ocellar triangle dark brown, with 2 small setae posterior to ocellar setae. Postocellar seta absent. Frons brown, with numerous minute interfrontal setulae. Pedicel yellow and first flagellomere dark brown, with black pubescence. Face, gena, and clypeus brown. Palpus brownish. Thorax: Mesonotum brownish yellow (Fig. 8G View Figure 8 ). Pleura with a distinct brown longitudinal stripe above (Fig. 8H View Figure 8 ). Scutellum mostly brownish yellow (Fig. 8G View Figure 8 ). Halter mostly brownish, with a yellow patch at knob (Fig. 8H View Figure 8 ). Legs yellowish (Fig. 10E View Figure 10 ). Abdominal tergites: brown. Male terminalia: Epandrium mostly pubescent except for anterior margin, with ca. 8 setae on dorsal to posterior portions per side (Fig. 20A View Figure 20 ). Surstylus separated from epandrium, narrowed dorsally, with ca. 13 long and 3 short peg-shaped prensisetae near anterodorsal margin on inner surface (Fig. 20B View Figure 20 ). Pregonites fused basally (Fig. 20C, D View Figure 20 ). Aedeagus pubescent distally (Fig. 20C, D View Figure 20 ).

Measurements and indices.

BL = 3.25 mm in holotype (range in 4♂ paratypes: 3.25-3.57), ThL = 1.49 mm (1.44-1.49), WL = 2.57 mm (2.60-2.87), WW = 1.27 mm (1.27-1.43), arb = 8/5 (6-8/3-5), avd = 0.91 (0.89-1.00), adf = 1.38 (1.00-1.29), flw = 1.88 (1.67-2.22), FW/HW = 0.40 (0.38-0.47), ch/o = 0.13 (0.13-0.14), prorb = 0.75 (0.74-0.87), rcorb = 0.67 (0.61-0.70), vb = 0.39 (0.39-0.55), dcl = 0.50 (damaged), presctl = 0.47 (0.56), sctl = damaged (1.08), sterno = 0.77 (0.76-0.82), orbito = 1.80 (1.67-2.00), dcp = 0.26 (0.19-0.23), sctlp = 1.18 (0.85-1.00), C = 2.64 (2.14-2.37), 4c = 1.10 (0.88-1.00), 4v = 1.90 (1.68-1.82), 5x = 1.50 (1.10-1.50), ac = 11.00 (11.00-11.50), M = 0.60 (0.48-0.55), C3F = 0.68 (0.65-0.68).

Distribution.

China (Sichuan).

Type material examined.

Holotype: ♂ (SCAU, No. 112085), China: Dafengding, Mabian, Sichuan, 28°34′42″N, 103°15′40″ E, altitude 1270 m, 27.vi.2017, swept from tussock, N.N. Wang. Paratypes: 3♂ (SCAU, Nos. 112086-88), N.N. Wang, L. Gong, other data same as the holotype; 1♂ (SCAU, No. 112089), Fengtongzhai, Baoxing, Sichuan, 30°33′26″N, 102°57′09″E, altitude 1500 m, 18.vii.2017, swept from tussock, N.N. Wang.

Etymology.

A combination of the Latin words " pinguis " (= thick) and "- itia " (= concept), referring to the aedeagus distally with dense long hairs.