Barsine wui, 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 : 414-415

Barsine wui sp. n.

( Figs 7, 8 , 21 , 26 )

Type material. Holotype ( Figs 7 , 21 ): male, “ Taiwan, Prov. Taichung, Anmashan , lower forest zone, 1650m, 20.VI.1997, leg. B. Herczig & L. Ronkay ” / “Genitalpräparat [genital slide] Heterocera Nr. 37.127 Museum Witt München” ( MWM / ZSM).

Paratype: 1 female, same data as for holotype, gen. prep. No.: MWM 37.128 (prepared by Volynkin) ( MWM / ZSM).

Diagnosis. Barsine wui sp. n. ( Figs 7, 8 ) is externally similar to B. ponlai ( Figs 4–6 ), but differs in the somewhat smaller size, the somewhat narrower forewing, the paler forewing ground color and the more diffuse forewing pattern. Additionally, the medial line of the new species is anteriorly less curved than in B. ponlai . In the male genital capsule of B. wui sp. n. ( Fig. 21 ), the saccus is somewhat wider than in B. ponlai ( Fig. 20 ), the valva is medially wider, and the medial costal process and the basal saccular process are thicker. The phallus of the new species is almost straight whereas it is medially curved in B. ponlai . The vesica structures of the two species are very similar but in B. wui sp. n., the 1st medial diverticulum is broader than in B. ponlai , the lobes of the 2nd medial diverticulum are somewhat shorter, the tip of the 3rd medial diverticulum is broader and less elongate, and the basal plate of the vesica ejaculatorius is narrower. The female genitalia of the new species ( Fig. 26 ) differ from those of B. ponlai ( Fig. 27 ) in the somewhat longer and anteriorly broader ductus bursae, the longer sclerotized area of the posterior section of the corpus bursae, and the smaller anterior signum bursae.

Description. External morphology of adults ( Figs 7, 8 ). Forewing length 16 mm in male and 17.5 mm in female. Male antenna densely ciliate while female one sparsely ciliate. Head and thorax pale yellow. Tegula and patagia with intense pale red suffusion. Forewing triangular with elongate apex. Forewing ground color pale yellow with pale red stripes between veins which absent only in medial area medio-distally. Pattern dark grey. Subbasal spot short comma-shaped. Antemedial line strongly angled medially. Medial line slightly S-like curved and connected to antemedial one medially in the male and angled in the cell and separated from antemedial one in female. Postmedial line strongly loop-like curved medially and subanteriorly. Postmedial area with diffuse longitudinal streaks of various lengths on veins connected to postmedial line proximally. Cilia pale yellow. Hindwing and its cilia pale yellowish creamy with slight reddish suffusion. Abdomen pale yellow. Male genitalia ( Fig. 21 ). Uncus elongate and slender, curved, with small claw-shaped tip. Tegumen shorter than valva, arms fused subapically. Vinculum equal in length to tegumen, saccus V-shaped with convex margins distally. Valva lobate, dilated medially and tapered distally. Medial costal process lobate with proximally elongate base and rectangular tip, weakly setose. Distal costal process short, thorn-shaped with rounded tip. Distal membranous lobe of valva short and narrow, apically rounded. Sacculus dilated basally, basal saccular process with broadly trapezoid base, elongate, curved dorsad, apically point- ed and not reaching the costa. Distal saccular process bilobate, distal lobe narrowly triangular, apically pointed and directed distally while dorsal lobe ca. twice shorter, triangular with rounded tip and directed dorso-distally. Juxta consisting of two lateral plates divided by thin membranous commissure; distal lobe of each plate longer than basal one, apically tapered. Phallus ca. 1.3 times shorter than tegumen-vinculum complex, dilated distally, with short coecum. Main chamber of vesica globular and membranous. Subbasal diverticulum short, globular, membranous. 1st medial diverticulum elongate and apically rounded, weakly granulated. 2nd medial diverticulum covered with tiny triangular cornuti basally and graniculi medially, membranous apically, with two short and granulated additional lobes (subdiverticula) subbasally and subapically. 3rd medial diverticulum conical with elongate and apically rounded distal end, covered with numerous short but robust triangular cornuti basally and medially and granulated laterally and apically. 4th medial diverticulum globular and bearing tiny triangular cornuti. 5th medial diverticulum broad, globular, covered with numerous short but robust triangular cornuti of various sizes. Distal plate of vesica ejaculatorius broadly triangular with convex outer and concave inner margins. Female genitalia ( Fig. 26 ). Papilla analis trapezoid with rounded corners, weakly setose. Apophyses elongate and thin, equal in length. Ductus bursae sclerotized, its posterior section strongly funnel-like dilated, with longitudinal folds. Anterior section of ductus bursae dorso-ventrally flattened, with weakly sclerotized lateral margins, somewhat dilated anteriorly. Junction of ductus and corpus bursae membranous. Posterior section of corpus bursae sclerotized and medially wrinkled, edged with row of tiny denticles anteriorly, with protruding and concave right margin. Anterior section of corpus bursae sack-like, membranous with two elliptical and weakly serrulate signa medially and anteriorly. Appendix bursae short, narrowly conical, sclerotized, positioned postero laterally at right side and projected latero-posteriorly.

Distribution. Endemic to Taiwan Island. Known from Taichung County.

Etymology. The new species is named after Dr Shipher Wu (Taipei, Taiwan), a renowned lepidopterist and expert in the Lepidoptera fauna of Taiwan Island.

Figures

FIGURES 1–9. Barsine spp.: adults. Depositories of the specimens: 1–3 and 5–9 in MWM/ZSM; 4 in TFRI (photo by S. Wu).

FIGURES 18–21. 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.