Barsura autumnalis Volynkin, 2017

Volynkin, A. V., 2017, Review of the genus Barsura Volynkin, Dubatolov et Kishida, 2017 (Lepidoptera, Erebidae, Arctiinae) from Vietnam, with description of two new species, Far Eastern Entomologist 339 (339), pp. 1-11 : 2-7

Barsura autumnalis Volynkin , sp. n.

Figs 1, 2 , 14 , 20

TYPE MATERIAL. Holotype – ♂, North Vietnam: Mt. Fan-si-pan, N side,

2250 m, 22°17'N 103°44'E, primary forest, 1–6.XI 1995, leg. V. Sinjaev & E.

Afonin, ex coll. A. Schintlmeister, slide MWM 31495 Volynkin (Coll. MWM/ ZSM).

Paratypes: same data as in the holotype, 39 ♂, 11 ♀, slides MWM 31496 (♂) and

MWM 31497 (♀) Volynkin (Coll. MWM/ ZSM); Mt. Fan-si-pan (Nord), 2350 m ,

Cha-pa, primary cloud forest, 22.15' N 103.45 'E, 28–30.X 1994, 2 ♂, leg. Sinjaev &

4 – B. vernalis sp. n.: 3 – holotype ♂, Vietnam, Fan-si-pan Mts. (MWM/ ZSM); 4 – paratype

♀, Vietnam, Fan-si-pan Mts. (MWM/ ZSM); 5, 6 – B. clandestina : 5 – holotype ♂, China ,

Yunnan ( ZFMK); 6 – paratype ♀, China , Yunnan ( ZFMK); 7, 8 – B. obscura : 7 – holotype

♂, China, Yunnan ( ZFMK); 8 – paratype ♀, China, Yunnan ( ZFMK) .

nat. coll. (Coll. MWM/ ZSM); Mt. Fan-si-pan (West), Cha-pa, secondary forest,

1600–1800 m, 22.20' N 103.40 'E, 10–30.X 1994, 2 ♂, 1 ♀, leg. Sinjaev & nat. coll.

(Coll. MWM/ ZSM); Mt. Fan-si-pan (West), 1600–1800 m, Cha-pa (=Sapa),

22.20' N 103.40 'E, secondary forest, IX.1994 1 ♂, leg. Mong (Coll. MWM/ ZSM) ;

Mt. Fan-si-pan, N side, 22°17'N 103°44'E, 1600 m, primary forest, 20–30.X 1995,

16 ♂, 17 ♀, leg. V. Sinjaev & E. Afonin, ex coll. A. Schintlmeister (Coll.

MWM/ ZSM); Mt. Fan-si-pan, N side, 1600 m, 22°17'N, 103°44'E, primary forest,

1–7.XI.1995, 1 ♀, leg. V. Sinjaev & E. Afonin, ex coll. A. Schintlmeister (Coll.

MWM/ ZSM); North Vietnam, Farin Pass, 20 km NW Son-la, 21.22' N 103.52 'E,

1600 m, 11–13.XI 1994, 1 ♂, leg. Sinjaev & Simonov (Coll. MWM/ ZSM).

( IZCAS, photo by Wu Chunsheng); 10 – ♂, Vietnam, Fan-si-pan Mts. (MWM/ ZSM); 11 – ♀ ,

Vietnam, Fan-si-pan Mts. (MWM/ ZSM); 12, 13 – B. nubifascia : 12 – ♂ , Nepal, Koshi

(MWM/ ZSM); 13 – ♂, Nepal, Annapurna Himal (MWM/ ZSM) .

DIAGNOSIS. The new species ( Figs 1, 2 ) is very similar externally to Himalayan

B. nubifascia ( Figs 12, 13 ) due its diffuse subterminal shadow with a strong dark suffusion on veins, but can be differed by the slightly paler hindwings; from the sympatric species B. vernalis differs by the smaller dots of transverse lines and paler and more diffuse subterminal shadow with a strong dark suffusion on veins. The male genitalia of B. autumnalis ( Fig. 14 ) are similar to those of Chinese B. clandestina

Volynkin, Dubatolov et Kishida, 2017 and differ by the narrower ventral costal process, the broader trigonal distal costal process without a small ventral lobe, the broader aedeagus, presence of several thorns on the carinal plate (whereas in B.

clandestina the carinal plate with only large thorn), the broader vesica, absence of cornuti in the subbasal ventral diverticulum, the larger cornuti in the apical and lateral fields, and presence of one-two additional needle-like subapical cornuti

(whereas in B. clandestina there is only one needle-like subapical cornutus). The female genitalia ( Fig. 20 ) differ from those of B. clandestina by the deeper ostial concavity of antevaginal plate, the anteriorly broader ductus bursae with larger lateral folds, the much broader lateral lobes of corpus bursae, and shorter and much broader anterior section of corpus bursae.

DESCRIPTION. Adult ( Figs 1, 2 ). Forewing length 15–16 mm in males and

16–17 mm in females. Male antennae bipectinate, female antennae ciliate. Head and thorax ochreous-yellow; abdomen paler, ochreous. Forewing ground color intense ochreous-yellow. Forewing pattern consists of subbasal black dot, curved antemedial line consisting of four blackish dots, S-like medial and postmedial lines situated very close to each other and consisting of blackish small spots of different size, and diffuse cuneate wedge connected to shadows with blackish suffusion on veins in the subterminal area. Cilia ochreous-yellow. Hindwing monotonous pale ochreousyellowish, cilia pale ochreous-yellowish.

Male genitalia ( Fig. 14 ). 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 concave; vinculum short, broad, U-like. Valva elongated, broad; costa heavily sclerotized, with robust,

curved and apically pointed ventral process, and large, robust, trigonal distal process directed ventrally; sacculus broad, with long and claw-like curved distal process.

Aedeagus long and narrow, with short and narrow coecum, and carinal plate with bunch of short robust thorn of different size. Vesica membranous, globular, with short subbasal ventral diverticulum with weak granulation, conical medial ventral diverticulum, apical field of cornuti of different size, lateral field of large cornuti,

and subapical bunch of two-three long needle-like, slightly curved cornuti.

Female genitalia ( Fig. 20 ). Ovipositor short, broad, conical; papillae anales broad, rectangular with rounded edges; apophyses 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, moderately long, narrowed anteriorly, dorso-ventrally flattened, with strongly sclerotized lateral folds, left fold longer and broader than right fold. Corpus bursae broad, subdivided into two large asymmetric heavily sclerotized lateral lobes covered inside with numerous short spinules, and sack-like, weakly sclerotized anterior section with weak spine-like scobination; appendix bursae small, conical, membranous, situated dorso-posteriorly.

slide AV 2011m Volynkin; 16 – B. vernalis sp. n., holotype, Vietnam, Fan-si-pan Mts., slide

MWM 31353 Volynkin; 17 – B. obscura , holotype, China, Yunnan, slide AV 2012m Volynkin.

DISTRIBUTION. North Vietnam (Hoang Lien Son mountain range).

ETYMOLOGY. From Latin “ autumnalis ” means autumnal. The specific epithet refers to its autumnal flight period.

Figures

Figs. 1–8. Adults of Barsura spp. 1, 2 – B. autumnalis sp. n.: 1 – holotype ♂, Vietnam, Fan-si-pan Mts. (MWM/ZSM); 2 – paratype ♀, Vietnam, Fan-si-pan Mts. (MWM/ZSM); 3,

Figs. 14–17. Male genitalia of Barsura spp. 14 – B. autumnalis sp. n., holotype, Vietnam, Fan-si-pan Mts., slide MWM 31495 Volynkin; 15 – B. clandestina, holotype, China, Yunnan,

Figs. 20–25. Female genitalia of Barsura spp. 20 – B. autumnalis sp. n., paratype, Viet-

Figs. 9–13. Adults of Barsura spp. 9–11 B. lineata: 1 – holotype ♂, China, Hunan