Barsura contrastata Volynkin, Dubatolov & Kishida, 2017

Volynkin, Anton V., Dubatolov, Vladimir V. & Kishida, Yasunori, 2017, Barsura Volynkin, Dubatolov & Kishida, gen. nov., with descriptions of three new species (Lepidoptera, Erebidae, Arctiinae), Zootaxa 4299 (1) : -

Barsura contrastata Volynkin, Dubatolov & Kishida , sp. nov.

( Figs. 13–14 , 37 , 51 )

Type material. Holotype ( Figs. 13 , 37 ): ♂, [ China, Shaanxi, Qinling Mts, Taibai Mt.] " Tapaishan im Tsinling , Sued-Shensi, Ca. 1700 m, 8.VIII. [19]36, H. Höne [leg.]" / " Asura nubifascia Wkr. det. F. Daniel 1953", slide AV 2112m Volynkin (Coll. ZFMK).

Paratypes: 95 specimens of both sexes, same locality and collector as in holotype, but 14.VII., 27.VII., 29.VII., 6.VIII., 7.VIII., 8.VIII., 9.VIII., 10.VIII., 11.VIII., 12.VIII., 13.VIII., 16.VIII., 19.VIII. 21.VIII. and 25.VIII.[19]36., slides AV 2009m, AV 2020m Volynkin (males), AV2010f, AV2026f Volynkin (females) (Coll. ZFMK); 25 ♂, 52 ♀, China, Gansu prov., Min Shan , 2350 m, 24.VII.–14.VIII.2000, 33°30'N, 104°35'E, 50 km W from WUDU, leg. Plutenko & Siniaev (Coll. MWM/ ZSM), slide ZSM Arct. 10/ 2014m Volynkin (male).

Diagnosis. Externally, the new species ( Figs. 13–14 ) is similar to B. clandestina sp. nov. ( Figs. 9–10 ) due to the bright yellow forewing ground color, but differs by the significantly more contrast forewing pattern in both sexes. The male genitalia ( Fig. 37 ) differ clearly from the three other externally similar congeners ( B. nubifascia , B. clandestina sp. nov. and B. obscura sp. nov.) by presence of the well developed pimple-like ampulla on costa between the distal and ventral costal processes, the distal costal process broader basally, and the vesica structure: in B. clandestina sp. nov. the cornuti on the subbasal ventral diverticulum are longest in the species-group, and the cornuti of the apical and the lateral fields of cornuti are shortest in the species-group. The female genitalia ( Fig. 51 ) is similar to B. obscura sp. nov. ( Fig. 50 ), but differ by the longer and broader ductus bursae having arcuate margins and the much larger lateral sclerotized folds, whereas in B. obscura sp. nov. the ductus bursae has straight lateral margins with much smaller sclerotized lateral folds.

Description. Adult ( Figs. 13–14 ). Forewing length 14–15 mm in males and 15–16 mm in females. Male antennae bipectinate, female antennae ciliate. Head and thorax dark yellow; abdomen paler, yellow. Forewing ground color dark yellow. Forewing pattern contrast, slightly more diffuse in female; pattern elements dark brown; pattern consists of subbasal dot, curved antemedial line consisting of four dots, S-like medial and postmedial lines situated very close to each other and consisting of small spots of different size, and cuneal connected shadows with dark strokes on veins in the subterminal area. Cilia dark yellow. Hindwing pale ochreous, with thin indistinct and diffuse brown medial band; cilia pale ochreous. Male genitalia ( Fig. 37 ). Uncus long, narrow, smoothly curved, apically pointed. Tuba analis narrow, scaphium narrow, weakly sclerotized; tegumen moderately long and broad, slightly C-like curved; juxta trigonal, with deep lower concavity; vinculum short, broad, U-like. Valva elongated, broad; costa heavily sclerotized, with robust, slightly curved and apically pointed ventral process, large, robust, trapezoidal distal process, and pimple-like ampulla between the distal and ventral costal processes; sacculus broad, with long, curved and apically pointed distal process. Aedeagus long and narrow, with short and narrow coecum, and broad carinal plate with one long robust thorn. Vesica membranous, globular, with short subbasal ventral diverticulum with a bunch of several strong needle-like cornuti, short conical medial ventral diverticulum, and apical and lateral fields consisting of short robust trigonal cornuti of different size; basal plate of ductus ejaculatorius small, weakly sclerotized. Female genitalia ( Fig. 51 ). Ovipositor short, broad, conical; papillae anales broad, rectangular with rounded edges; apophyses anteriores and posteriores long and thin, apophyses posteriores about two times longer than apophyses anteriores. Antevaginal plate wrinkly sclerotized, with deep round concavity near its conjunction with ostium bursae. Ostium bursae broad; ductus bursae broad, short, with curved margins, dorso-ventrally flattened, with large strongly sclerotized lateral folds, left fold significantly longer and broader than right fold. Corpus bursae small, subdivided into two medium-sized asymmetric heavily sclerotized lateral lobes covered inside with numerous short spinules, and elliptical, weakly sclerotized anterior section with weak spine-like scobination; appendix bursae small, conical, membranous, situated dorso-posteriorly.

Distribution. Central China: Tsinling and Minshan Mts.

Note. The species was reported for Tsinling Mts by Daniel (1955) as ‘ Asura nubifascia ’.

Etymology. The species name refers to its contrast pattern.

Figures

FIGURES 13 – 19. Barsura spp.: adults. 13, B. contrastata, holotype ♂, China, Shaanxi (ZFMK); 14, B. contrastata, paratype ♀, China, Shaanxi (ZFMK); 15, B. lineata, holotype ♂, China, Hunan (IZCAS, photo by Wu Chunsheng); 16, B. lineata, ♂, China, Guangdong (SZMN); 17, B. simplifascia, lectotype ♀, Sikkim (© NHM); 18, B. simplifascia, ♂, Sikkim (© NHM); 19, B. simplifascia, ♀, Sikkim (© NHM).

FIGURES 34 – 37. Barsura spp.: male genitalia. 34, B. nubifascia, Sikkim, slide BMNH (E) Arct- 6501 m Volynkin (© NHM); 35, B. clandestina, holotype, China, Yunnan, slide AV 2011 m Volynkin; 36, B. obscura, holotype, China, Yunnan, slide AV 2012 m Volynkin; 37, B. contrastata, holotype, China, Shaanxi, slide AV 2009 m Volynkin.

FIGURES 48 – 53. Barsura spp.: female genitalia. 48, B. nubifascia, Sikkim, slide BMNH (E) Arct- 6502 f Volynkin (© NHM); 49, B. clandestina, paratype, China, Yunnan, slide AV 2021 f Volynkin; 50, B. obscura, China, Yunnan, slide AV 2022 f Volynkin; 51, B. obscura, China, Shaanxi, slide AV 2026 f Volynkin; 52, B. simplifascia, Sikkim, slide BMNH (E) Arct- 6504 f Volynkin (© NHM); 53, B. melanoleuca, Sikkim, slide BMNH (E) Arct- 6506 f Volynkin (© NHM).

FIGURES 5 – 12. Barsura spp.: adults. 5, B. nubifascia, ♂ syntype, Sikkim (© NHM); 6, B. nubifascia, ♀ holotype of punctifascia, no exact locality (© NHM); 7, B. nubifascia, ♂, Nepal (MWM / ZSM); 8, B. nubifascia, ♀, Nepal (MWM / ZSM); 9, B. clandestina, holotype ♂, China, Yunnan (ZFMK); 10, B. clandestina, paratype ♀, China, Yunnan (ZFMK); 11, B. obscura, holotype ♂, China, Yunnan (ZFMK); 12, B. obscura, paratype ♀, China, Yunnan (ZFMK).