Stegana (Steganina) simola 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 : 98-99

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

( Figs. 13I, 13J , 62 )

Diagnosis. This species is similar to S. (S.) cinereipecta sp. nov. in the shape of male terminalia except aedeagus and subepandrial sclerite ( Figs. 30 , 62 ), but can be distinguished from the latter by having the surstylus with numerous minute, serrated processes on outer surface and lacking pubescence ( Fig. 62A, B ); the aedeagus distally roundly expanded, lacking pubescence ( Fig. 62C, D ); the subepandrial sclerite slightly vaulted ( Fig. 62G ).

Description. Male and female: First flagellomere yellow. Clypeus yellow. Mesonotum brown medially, yellow laterally ( Fig. 13I ). Katepisternum yellowish ( Fig. 13J ). Scutellum dark brown ( Fig. 13I ). Halter mostly grey ( Fig. 13J ). Fore femur with a row of 4 long setae on distal part of posteroventral surface. Abdominal tergites dark brown to black medially, yellow laterally ( Fig. 13I, J ); sternites yellow, about 1.6 times as wide as long. Male terminalia ( Fig. 62 ): Epandrium with ca. 11 setae on dorsal to posterior portions per side ( Fig. 62A ). Surstylus with 1 peg-like tooth and numerous setulae near distal margin ( Fig. 62A, B ). Cercus with much pubescence ( Fig. 62A ). Hypandrium roundly expanded anteromedially ( Fig. 62C, D ). Pregonite small, with 2 or 3 sensilla ( Fig. 62C, D ). Aedeagus with numerous minute, serrated processes distally ( Fig. 62C, D ). Aedeagal sheath distally with numerous minute, serrated processes ( Fig. 62E, F ).

Measurements and indices. BL = 2.73 mm in holotype (2.73–2.80 in 2♂, 2.80–3.40 in 2♀ paratypes), ThL = 1.33 mm (1.27–1.33 in ♂, 1.33 in ♀), WL = 2.13 mm (2.13–2.20 in ♂, 2.00– 2.47 in ♀), WW = 1.00 mm (0.93–1.00 0.67 (0.60–0.80), dcl = 0.51 (0.48–0.51), presctl = 0.77 (0.69–0.77), sctl = 2.00 (2.00–2.50), sterno = 0.80 (0.60– 1.11), orbito = 2.67 (2.00–2.67), dcp = 0.22 (0.17–0.22), sctlp = 1.86 (1.75–2.50), C = 1.67 (1.56–2.00), 4c = 1.29 (1.13–1.50), 4v = 1.71 (1.43–2.33), 5x = 2.50 (1.67–2.50), ac = 9.00 (9.00), M = 0.71 (0.63–0.83), C3F = 0.56 (0.56–0.67).

Type materials. Holotype ♂ ( SCAU, No. 125650, DNA #1185), CHINA: Wangtianshu, Mengla , Yunnan, 21°36'09''N, 101°35'06''E, alt. 700m, 25.iv.2007, ex tree trunk, H.W. Chen . Paratypes: 2♂, 2♀ ( SCAU, Nos. 125651–54, DNA #2662), other data same as holotype.

Distribution. China (Yunnan).

Etymology. From the word " simola " in Va language from the Va nationality living in Yunnan, China, referring to the meaning "a happy place".

Figures

FIGURE 13. Head, thorax, and abdomen in dorsal and lateral views: A, B. Stegana (Steganina) rava Cui & Chen, sp. nov.; C, D. S. (S.) sciophila Li & Chen, sp. nov.; E, F. S. (S.) septencolorata Li & Chen, sp. nov.; G, H. S. (S.) silvestrella Zhang & Chen, sp. nov.; I, J. S. (S.) simola Cui & Chen, sp. nov.

FIGURE 30. Stegana (Steganina) cinereipecta Zhang & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus

FIGURE 62. Stegana (Steganina) simola Cui & Chen, sp. nov., male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; E, F. Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view.