Barsine eurydice Volynkin & Černý, 2019

Volynkin, Anton V., Černý, Karel & Huang, Si-yao, 2019, A review of the Barsine perpallida-B. yuennanensis species-group, with descriptions of six new species (Lepidoptera: Erebidae: Arctiinae), Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 273-293 : 288-290

Barsine eurydice Volynkin & Černý , sp. nov.

( Figs 29, 30 , 44 , 55 )

Type locality: N Vietnam, Mt. Fan-si-pan, N side, Chapa, 22°15′N 103°45′E, 2250 m.

Type material. HOLOTYPE ( Figs 29 , 44 ):♂, “ Vietnam (N) / Mt.Fan-si-pan, N-side / Chapa , 22°15’N 103°45’E / 2250m, 26.IV.1995 / leg. Sinjaev & loc.coll.”, slide MWM 31554 Volynkin ( MWM / ZSM) . PARATYPES: VIETNAM: 62 ♂♂ 9 ♀♀, same data as in the holotype, slide MWM 31555 (♀) Volynkin ( MWM / ZSM); 16 ♂♂ 16 ♀♀, N Vietnam, 1600 m, Mt. Fan-si-pan (North), Cha-pa, primary forest, 22.17°N 103.44°E, 20–30. iv.1995, leg. V. Sinjaev & local collectors ( MWM / ZSM); 1 ♂ 1 ♀, same locality and collectors, but 20–30.vi.1995 ( MWM / ZSM); 1 ♂ 4 ♀♀, N Vietnam, Mt. Fan-si-pan,W side, Chapa, 22°20′N 103°40′E, 1600–1800 m, iv.1995, leg. Sinjaev & loc. collector, ( MWM / ZSM); 1 ♀, Vietnam (N), Mts Fan-si-pan, W side, Chapa, 22°20′N 103°40′E, 1600–1800 m, iv.1994, leg.Sinajev & loc.coll.( MWM / ZSM); 2♂♂ 4♀♀, same locality and collectors, but 15–25.iv.1995 ( MWM / ZSM); 1 ♂, same locality and collectors, but ix.1995 ( MWM / ZSM); 1 ♀, N Vietnam, 16[00]– 1800 m, Mt. Fan-si-pan (West), Cha-pa, ix.1994, 22.20°N 103.40°E, sec. forest / agrocenosis, Sinjaev & loc. coll. ( MWM / ZSM); 5 ♂♂ 3 ♀♀, N Vietnam Mt. Fan-si-pan, Cha-pa, 22.15°N 103.46°E, 8–29.v.1993, 2400 m, NN, leg. Sinjaev & Simonov, ex coll. A. Schintlmeister ( MWM / ZSM); 1 ♂ 1 ♀, N Vietnam, 1400 m, Mai-chau, primary forest, 40 km SE Mocchau, 20.50°N 104.50°E, 7–15.iv.1995, leg. Sinjaev & local collectors ( MWM / ZSM); 3 ♂♂, North Vietnam, Tam Dao (sec. forest), 60 km NW Hanoi, 1200 m (21.34°N 105.20°E), 1–5.v.1993, leg. Sinajev & Simonov ( MWM / ZSM).

Diagnosis. Barsine eurydice ( Figs 29, 30 ) is similar externally to B. ruficollis ( Figs 31, 32 ), but differs in its slightly larger size, darker, ochreous yellow body and forewing coloration (pale yellow in B. ruficollis ), and the absence of a red subbasal subcostal stroke on forewing (present in B. ruficollis ). The male genitalia of B. eurydice ( Fig. 44 ) are most similar to those of B. yuennanensis ( Fig. 42 ) and B. nigrovena ( Fig. 43 ), but can be distinguished by broader medial costal process directed ventrally (in B. yuennanensis it is narrower and directed ventrally-distally), slightly smaller lobes of the distal saccular process, broader basal diverticulum of vesica, slightly smaller cornuti on the 2 nd medial diverticulum, and longer distal section of the 3 rd medial diverticulum. Compared to those of B. nigrovena , the male genitalia of the new species have more robust uncus, longer and narrower juxta, basally broader valva, smaller distal costal process, slightly broader distal membranous lobe of valva, slightly shorter distal lobe of the distal saccular process, larger basal diverticulum of vesica, slightly longer 2 nd medial diverticulum with slightly smaller subdiverticulum, and granulated tip of the 3 rd medial diverticulum (bearing small cornuti in B. nigrovena ). The female genitalia of B. eurydice ( Fig. 55 ) differ from those of B. yuennanensis ( Fig. 53 ) in slightly shorter ductus bursae, more heavily sclerotized and more rugose posterior section of corpus bursae, and rounded signum (elliptical in B. yuennanensis ); from B. nigrovena ( Fig. 54 ) it differs in broader sclerotised area of the posterior section of corpus bursae, and smaller, round signum (larger and grain-shaped in B. nigrovena ).

Description. Adult ( Figs 29, 30 ). Forewing length 19.5– 20.0 mm in males (19.5 mm in holotype) and 21.0–22.0 mm in females. Male antennae ciliate, female antennae filiform. Head ochreous yellow. Thorax ochreous yellow, patagia red.Abdomen pale ochreous basally and dark ochreous yellow distally. Forewing ground color ochreous yellow. Pattern black. Subbasal small black dot. Antemedial and medial line oblique, consist of short strokes on veins. Postmedial line smoothly curved, consists of short strokes on veins. Subterminal area with blackish suffusion on veins. Costa black in subbasal area. Cilia ochreous yellow. Hindwing pale, creamy. Cilia pale yellowish. In females black pattern significantly reduced. Male genitalia ( Fig. 44 ). Uncus narrow and laterally flattened, with claw-like tip; its distal third curved. Tuba analis broad, membranous, subscaphium broad and setose. Tegumen short and narrow. Juxta long, X-shaped. Vinculum short, broadly V-shaped with rounded tip. Valva broad basally, narrowed distally. Medial costal process broadly trigonal, with curved outer margin, directed ventrally. Distal costal process absent. Distal membranous lobe of valva moderately broad, short, directed distally. Sacculus broad, its basal process long, robust, curved dorsally and pointed apically. Distal saccular process bilobate, its dorsal lobe short, narrow, with blunt apex, directed dorsally-distally; distal lobe of distal saccular process elongated, with blunt apex, directed distally. Aedeagus slightly curved medially and broadened distally. Basal diverticulum of vesica short, very broad, rounded, membranous. 1 st medial diverticulum hook-like curved, granulated. 2 nd medial diverticulum elongated, narrow, with one basal short diverticulum, granulated. 3 rd medial diverticulum broadened basally, its distal section short, narrowed, granulated; basal part of 3 rd medial diverticulum covered with short but robust cornuti of various size. 4 th medial diverticulum short, broad, covered with short but robust cornuti of various size. 5 th medial diverticulum short, broad, globular, covered with short but robust cornuti of various size. Basal plate of vesica ejaculatorius large and heavily sclerotized, broadly trigonal with slightly curved outer margin. Female genitalia ( Fig. 55 ). Papillae anales broad, trapezoidal with rounded corners. Apophyses long and thin, of equal length. Ostium bursae broad. Ductus bursae sclerotized, elongated, dorso-ventrally flattened, slightly broadened anteriorly, its posterior part with several broad longitudinal subostial folds. Corpus bursae short, globular, its anterior half membranous. Posterior half of corpus bursae with one rounded signum and sclerotized, rugose area surrounded by area of weak, shortly spinulose scobination.Appendix bursae sclerotized, shortly conical, curved, situated postero-laterally.

Etymology. In the ancient Greek mythology, Eurydice was an oak nymph, one of the daughters of Apollo and the beloved wife of Orpheus. The species name refers to its beautiful appearance and forest inhabitation. Noun in apposition.

Distribution. The species is known from North Vietnam (provinces of Lào Cai, Hòa Bình and Vĩnh Phúc) only.

Figures

Figs 25–32. Barsine spp., adults. 25–28 – B.dao sp. nov.: 25 – holotype♂, N Vietnam (MWM/ZSM); 26 –♂, China,Yunnan (MWM/ZSM); 27 – paratype ♂, N Vietnam (MWM/ZSM); 28 – paratype ♀, N Vietnam (MWM/ZSM); 29–30 – B. eurydice sp. nov. 29 – holotype ♂, N Vietnam (MWM/ZSM); 30 – paratype ♀, N Vietnam (MWM/ZSM). 31–32 – B. ruficollis (Fang, 1991): 31 – ♂, China, Yunnan (MWM/ZSM); 32 – ♀, China, Yunnan (MWM/ZSM).

Figs 42–44. Barsine spp., male genitalia. 42 – B. yuennanensis (Daniel, 1952), holotype, China, Yunnan, slide AV1846 Volynkin. 43 – B. nigrovena (Fang, 2000), China, Hubei, prep. Huang. 44 – B. eurydice sp. nov., holotype, N Vietnam, slide MWM 31554 Volynkin.

Figs 54–57. Barsine spp., female genitalia. 54 – B. nigrovena (Fang, 2000), China, Sichuan, slide NHMUK010313508 Volynkin (©NHMUK). 55 – B. eurydice sp. nov., paratype, N Vietnam, slide MWM 31555 Volynkin. 56 – B. ruficollis (Fang, 1991), China, Yunnan, slide MWM 31545 Volynkin. 57 – B. dao sp. nov., paratype, N Vietnam, slide MWM 31553 Volynkin.

Figs 48–53. Barsine spp., female genitalia. 48 – B. biformis sp. nov., paratype, Thailand, slide ZSM Arct. 155 / 2017 Volynkin. 49 – B. perpallida (Hampson, 1900), syntype of Diacrisia porthesioides Rothschild, 1910, India, slide NHMUK010315755 Volynkin (©NHMUK). 50 – B. laszloi sp. nov., paratype, Nepal, slide MWM 35760 Volynkin. 51 – B. hausmanni sp. nov., paratype, Thailand, slide MWM 31547 Volynkin. 52 – B. andromeda sp. nov., paratype, China, Shaanxi, slide MWM 31543 Volynkin. 53 – B. yuennanensis (Daniel, 1952), paratype, China, Yunnan, slide AV1843 Volynkin.