Ashibusa dilatirotunda Li, sp. nov. urn:lsid:zoobank.org:act: AA5D6943-4D6B-4D37-B0C6-547DB2527539 (Figs 6, 14) Type material. CHINA, Guangdong: Holotype ♂, Nanling, Shaoguan City, 7–14.VII.2007, leg. M Wang et al., slide No. ZD 21398. Diagnosis. The new species is superficially similar to A. sinensis Zhang & Li, 2009. It can be distinguished in the male genitalia by the right brachium of the socius with a triangular dorsal process, the valvae with distal 1/3 inflated subcircularly, and the straight phallus with a pointed apex. In A. sinensis, the right brachium of the socius has a horn-shaped dorsal process, the valvae are expanded triangularly in distal 1/4, and the curved phallus has a forked apex (Zhang & Li, 2009: 340, fig. 11). Description. Adult (Fig. 6). Wingspan 11.0 mm. Head. Vertex and frons white. Antennae with scape white; flagellum pale yellow, alternated with white on dorsal surface. Labial palpi white. Thorax. Dorsum of mesothorax and tegulae white, with yellow stripes. Forewings with basal half black, distal half orange yellow mixed with reddish brown, except black from middle of dorsum to tornus; milky white fascia extending discontinuously from basal 1/4 of costal margin to dorsum; milky white spot from beyond 1/2 of costal margin to above dorsum, mixed with black scales; small black spot at lower angle of discal cell, surrounded by white scales; white streak from near apex obliquely inward to termen; fringes yellow, mixed with brown along dorsum. Hindwings and fringes brown. Fore- and midlegs white, except tibiae yellow in distal half, mid tibia with brown scales; hindleg with femur white, tibia with whorls of bristles black mixed white, tarsus pale yellow. Male abdomen and genitalia (Fig. 14): Male abdomen. Pleural lobes of eighth segment 2/3 length of valva. Male genitalia. Socius with right brachium narrowed to apex; dorsal process large, triangular, arising from distal half. Left brachium half length of right brachium, basal 1/3 broad, narrowed to rounded apex distally. Valvae with basal 2/3 uniformly wide, distal 1/3 dilated subcircularly, distal half with dense setae ventrally. Left valvella slender, 1/3 length of phallus, distal 1/3 slightly broadened to near apex; right valvella reduced. Phallus stout, narrowed distally. Female unknown. Distribution. China (Guangdong). Etymology. The specific epithet of the new species is derived from the Latin dilat- and rotundus, referring to the distally dilated valvae of the male genitalia.

Published as part of Zhang, Di & Li, Houhun, 2023, A taxonomic review of the genus Ashibusa Matsumura, 1931 (Lepidoptera: Cosmopterigidae) from China, pp. 265-281 in Zootaxa 5380 (3) on page 271, DOI: 10.11646/zootaxa.5380.3.4, http://zenodo.org/record/10224515