Barsine witti, Volynkin, 2021

Volynkin, Anton V., 2021, Three new species of the genus Barsine Walker (Lepidoptera: Erebidae: Arctiinae) from Taiwan, Zootaxa 5032 (3), pp. 411-422 : 415-421

Barsine witti sp. n.

( Figs 10–13 , 22, 23 , 28 )

Type material. Holotype ( Figs 10 , 22 ): male, “ Taiwan, Prov. Taichung, Hui Sun Exp. Forest, Guandashi LTER site, 950m, 24°04’49’’N, 121°02’08’’E, 12–13.IV.1997, leg. Peregovits & Kun” / “Genitalpräparat [genital slide] Heterocera Nr. 37.135 Museum Witt München” ( MWM / ZSM).

Paratypes. TAIWAN: 9 males, 1 female, same data as for holotype, gen. prep. Nos.: MWM 37.137 (male) , MWM 37.131 (female) (prepared by Volynkin) ; 6 males, prov. Taipei, 10 km SE of Pinglin, Pihou , 450 m, 16.IV.1997, Gy. Fábián & S. T . Kovács leg., gen. prep. No.: MWM 37.133 (prepared by Volynkin) ; 11 males, prov. Taoyuan, Ming Chyr Forest Recreation Area , 1160 m, 17–18.IV.1997, Gy. Fábián & S. T . Kovács leg., gen. prep. Nos.: MWM 35.746 , MWM 37.134 (prepared by Volynkin) ; 2 males, prov. Pingtung, 5 km W of Chipen , 470 m, 27–28.IV.1997, Gy. Fábián & S. T . Kovács leg.; 3 males, prov. Taitung, Hsiangyang, Police station , 2320 m, 29–30.IV.1997, Gy. Fábián & S. T . Kovács leg., gen. prep. No.: MWM 37.138 (prepared by Volynkin) ; 5 males, 1 female, prov. Taitung, Mutien, 1500 m, 21. V .1997, Gy. M. László & G. László leg., gen. prep. Nos.: MWM 37.139 (male) , MWM 37.132 (female) (prepared by Volynkin) ; 1 male, prov. Nantou, 3 km E of Tili , 23°47’N, 120°58’E, 555m, 31.III.1996, T . Csővári & P. Steger leg., gen. prep. No. : MWM 37.136 (prepared by Volynkin) (all in MWM / ZSM) ; 1 male, For- mosa centr., [Nantou Co., Jenai] Wushai , IV.1959 (H.), coll. Dr. R . Bender / Museum A. Koenig Eng. Nr. ex Coll. 95/448, gen. prep. No.: AV2214 (prepared by Volynkin) ( ZFMK) .

Diagnosis. The new species belongs to the B. obsoleta ( Reich, 1937) species-group reviewed by Volynkin & Černý (2017) and among all species, it is most similar to B. callorufa . The male of B. witti sp. n. ( Figs 10, 11 ) is distinguished from that of B. callorufa ( Figs 14–16 ) by its larger size, the crimson body (orange-pinkish in B. callorufa ), the more elongate forewing, the deeper crimson forewing ground color with narrower area of yellow suffusion in the cell distally, the darker greyish brown transverse lines, the thinner postmedial streaks between veins, the crimson forewing cilia (orange in B. callorufa ), and the deeper red hindwing with only a grey suffusion on veins terminally in some specimens whereas B. callorufa has a diffuse grey postmedial transverse fascia. The female of B. witti sp. n. ( Figs 12, 13 ) differs from that of B. callorufa ( Fig. 17 ) in the larger size, the wider forewing with a somewhat more angular tornus, and the wider transverse lines and the longitudinal postmedial streaks. Compared to B. callorufa ( Figs 24, 25 ), the male genital capsule of the new species ( Figs 22, 23 ) has a longer valva, a somewhat longer distal membranous lobe of the valva, a basally thinner and longer basal saccular process, and a somewhat basally thicker distal saccular process. The phallus of B. witti sp. n. is longer and wider than in B. callorufa . In the vesica of B. witti sp. n., the 2nd medial diverticulum is markedly longer and broader than in B. callorufa and bears more robust cornuti. Additionally, the distal section of the 3rd medial diverticulum of the new species is broader than in B. callorufa and bears small but robust cornuti whereas it is granulated in B. callorufa . In the female genitalia, the ductus bursae of B. witti sp. n. ( Fig. 28 ) is longer and wider than that of B. callorufa ( Fig. 29 ). The corpus bursae of the new species is markedly longer and broader than in B. callorufa and has a longer and more heavily sclerotized posterior section. Additionally, compared to that of B. callorufa , the appendix bursae of B. witti sp. n. is basally wider.

Description. External morphology of adults. Male ( Figs 10, 11 ). Forewing length 18–20 mm. Antenna densely ciliate, deep yellow subbasally and brown medially and distally. Head crimson. Thorax crimson with two dark brown round spots anteriorly. Tegula crimson with blackish spot anteriorly. Forewing ground color crimson with deep yellow suffusion on veins. Pattern greyish-brown, transverse lines with darker spots on veins. Subbasal spot round, blackish. Antemedial line angled in cell. Costal margin blackish-brown in subbasal area. Medial line almost straight, fused with antemedial one in cell. Postmedial line strongly curved medially. Postmedial and subterminal areas with streaks on veins connected to postmedial line proximally. Cilia monotonous crimson. Hindwing dark pink with slight yellow suffusion basally and slight grey suffusion on veins terminally in some specimens. Cilia pink with admixture of yellow scales. Abdomen reddish orange, more yellowish distally. Female ( Figs 12, 13 ). Forewing length 24–25 mm. Antenna sparsely ciliate, deep yellow subbasally and brown medially and distally. Head orange-yellow. Thorax orange-yellow with two dark brown round spots anteriorly. Tegula orange-yellow with dark brown spot anteriorly. Forewing ground color deep yellow with orange-red spots and streaks between veins. Pattern greyish-brown, transverse lines with darker spots on veins. Subbasal spot round. Transverse lines with slightly dentate margins. Antemedial line angled in cell. Medial line slightly curved in cell. Postmedial line strongly curved medially. Postmedial area with longitudinal streaks of various lengths on veins. Cilia monotonous deep yellow. Hindwing pale ochreous-yellow. Abdomen yellow basally and orange-yellow distally. Male genitalia ( Figs 22, 23 ). Uncus elongate, slender, curved subbasally, somewhat dilated distally, with tiny claw-shaped tip. Tegumen shorter than valva, arms fused in distal 1/3. Vinculum equal in length to tegumen, V-shaped with somewhat convex lateral margins and rounded tip. Valva elongate, slightly tapered distally, with medially convex costal margin. Medial costal process positioned subbasally, triangular with base elongate proximally and rectangular tip. Distal membranous lobe of valva broad and apically rounded. Sacculus dilated basally and strongly tapered medially. Basal saccular process long (ca. 0.6 of valva length), with wide trapezoidal base, evenly narrow medially and distally, distal section somewhat curved dorsad and apically pointed. Distal saccular process unilobate, thorn-shaped, apically pointed, directed distally. Juxta consisting of two lateral plates divided by thin membranous commissure; distal lobe of each plate longer than basal one, apically tapered. Phallus somewhat shorter than tegumen-vinculum complex, dilated distally. Main chamber of vesica globular, membranous. 1st medial diverticulum broad and elongate, membranous basally and medially and with rectangular and weakly granulated apical section. 2nd medial diverticulum large, sack-like, with tapered and apically rounded tip, granulate, with wide cluster of short but robust cornuti laterally. 3rd medial diverticulum elongate and distally tapered and apically rounded, covered with short but robust triangular cornuti of various sizes. 4th medial diverticulum short, globular, with cluster of short but robust triangular cornuti of various sizes. 5th medial diverticulum broad, globular, covered with short but robust triangular cornuti of various sizes. Basal plate of vesica ejaculatorius broadly triangular with convex margins. Female genitalia ( Fig. 28 ). Papilla analis trapezoid with rounded corners, weakly setose. Apophyses elongate and thin, apophysis anteriores longer than posteriores one. Ductus bursae sclerotized, dorso-ventrally flattened, with longitudinal folds posteriorly and somewhat dilated anteriorly. Junction of ductus and corpus bursae membranous. Posterior section of corpus bursae sclerotized and longitudinally wrinkled ventrally and with elliptical signum dorsally, edged with wide row of tiny denticles anteriorly.Anterior section of corpus bursae semiglobular and membranous. Appendix bursae short but broad, conical, sclerotized but membranous apically, positioned postero laterally at right side and projected latero-posteriorly.

Distribution. Endemic to Taiwan Island. Known from Taitung, Taichung, Taipei, Pingtung, Nantou and Taoyu- an Counties.

Remark. The species was confused with B. callorufa in some previous publications. The female genitalia illustrated by Wu et al. (2013) and subsequently by Volynkin & Černý (2017: fig. 28) as B. callorufa belong to B. witti sp. n. The male genitalia illustrated by Volynkin & Černý (2017: fig. 20) as B. callorufa also belong to B. witti sp. n.

Etymology. The new species is dedicated to the memory of Dr Thomas J. Witt (Munich, Germany), a famous lepidopterist and a founder of the Museum Witt Munich having one of the largest collections of Heterocera in the world.

Figures

FIGURES 10–17. Barsine spp.: adults. Depositories of the specimens: 10–13 and 15–17 in MWM/ZSM; 14 in TFRI (photo by S. Wu).

FIGURES 22–25. Barsine spp.: male genitalia. The specimens dissected are deposited in MWM/ZSM.

FIGURES 26–29. Barsine spp.: female genitalia. The specimens dissected are deposited in MWM/ZSM.