Tarika biserratula sp. n.

(Figs 13, 14, 31, 39)

Type material. Holotype (Figs 13, 31): male, “ China / Hunan | Nanling Mts., 1500 m | Shikengkong Mt., | 24° 54′ N; 112° 57′ E | 15–30. XI. 2003 | leg. V. Siniaev” / “Slide | ZSM Arct. | 2021-235♁ / A. Volynkin ” (MWM / ZSM).

Paratypes: CHINA: 1 male, 1 female, same data as holotype, gen. prep. Nos.: ZSM Arct. 2021-236 (female), ZSM Arct. 2021-263 (male) (prepared by Volynkin) (MWM / ZSM).

Diagnosis. The forewing length is 15.5 mm in males and 18.0 mm in female. The new species is superficially most similar to T. reducta sp. n. due to its relatively small size but differs from it in the somewhat narrower forewing in both sexes. The male genital capsule of T. biserratula sp. n. is similar to T. danieli sp. n. and T. kinha sp. n. but distinguished by the somewhat thicker arms of the vinculum,the somewhat narrower valva with almost parallel margins (the valva margins are convex in the aforementioned congeners), and the shorter distal saccular process. The vesica of T. biserratula sp. n. differs clearly from other species of Tarika in the larger, trilobate medial diverticulum bearing a broad serrulate plate in the distal lobe. Additionally, the subbasal tubular section of the vesica is remarkably longer than in other congeners. The female genitalia of the new species are distinguished from other species in the genus by the presence of two subostial lobes latero-ventrally, and the elongate and narrow ductus bursae.

Distribution. South China (southern Hunan Province).

Etymology. The specific epithet refers to the presence of two serrulate plates in the phallus vesica. The name is a noun in the nominative singular in apposition.