Sergeya olei Bidzilya, Mey & Rajaei, 2024, sp. nov.

Sergeya olei sp. nov. (Figs 6, 30, 43) Type material. Holotype ♂, Thailand, Chieng Mai Province, Chieng Mai, 325 m, 15–30.x.1984, leg. O. Karsholt, Lomholdt & Nielsen, Zool. Mus., Copenhagen (gen. slide 284/24, O. Bidzilya) (ZMUC). Paratypes: 1 ♂, 2 ♀, same data as for holotype (gen. slide 279/24♂, 282/24♀, O. Bidzilya) (ZMUC). Diagnosis. The new species superficially looks similar to S. lobata sp. nov., but it has smaller wingspan (5.9–6.0 mm in S. olei sp. nov. versus 6.5–7.0 mm in S. lobata sp. nov.). Male genitalia most resembling those of S. hackeri sp. nov., but in S. olei sp. nov. ventral margin of cucullus distinctly widened and bears setae (in S. hackeri sp. nov. ventral margin of cucullus is straight and does not bear strong setae). Female genitalia of S. olei sp. nov. are similar to those of S. hackeri sp. nov., as both species have anterior margin of sternum VIII bent anteriorly. However, in S. olei sp. nov. ostium bears lateral tooth; antrum unmodified laterally; ductus bursae is comparatively wide; signa are gathered in г-shaped band (in S. hackeri sp. nov. ostium does not bear lateral tooth; antrum has two medial hump-shaped lobes; ductus bursae is slenderer; signa are gathered in ovate band). Description (Fig. 6). Wingspan 5.9–6.0 mm. Head light grey; labial palpus recurved, segment 2 covered with black white-tipped scales, apex white; segment 3 black with narrow white medial ring and white apex, inner surface white in medial third; antennal scape white mottled with brown, flagellum in basal half brown ringed with yellow, distal half with alternating 2–3 dark brown and 1–2 pale segments, terminal flagellomere white; thorax and tegulae yellowish-brown mixed with dark brown; forewing yellowish-brown, costal margin mottled with dark brown to 3/4–4/5, oblique dark brown fascia mixed with silver-tipped scales from 2/3 of costal margin to1/2 of dorsal margin, dorsal margin sparsely suffused with dark brown to 2/3, brown tornal spot surrounded with silver scales on 4/5, apex spotted with dark brown and suffused with white-tipped scales, fringe yellowish-brown on apex and grey on termen; hindwing and fringe light grey. Male genitalia (Fig. 30). Uncus slender, elongate, gradually narrowed towards pointed apex, densely covered with modified feather-like scales, slightly longer and about 1/2 width of tegumen; extending to 2/3 length of cucullus; tegumen trapezoidal, anterior margin weakly produced anteriorly; ventral margin of cucullus broadly widened in basal half and covered with strong curved setae, then straight, dorsal margin straight, covered with feather-like scales, apex rounded; glandiductor inflated on base, distal process slender, weakly curved, extending about 2/3 length of cucullus; juxta elongate, weakly narrowed apically; vinculum slightly broad; saccus narrow, triangular, extending to top of pedunculus; phallic tube straight, weakly narrowed towards pointed apex, with row of four small subapical teeth. Female genitalia (Fig. 43). Papillae anales narrow, ovate, sparsely covered with short hairs; apophyses posteriores straight, thin, about 2.5 times longer than apophyses anteriores; sternum VIII unmodified, trapezoidal, slightly broader on base than long, gently narrowed posteriorly, anterior margin weakly bent anteriorly; apophyses anteriores straight, about as long as sternum VIII; ostium U-shaped, with very small delicate tooth-shaped sclerites; ductus bursae slender, of even width, antrum tubular; corpus bursae rounded, covered with dense patch of needle-shaped sclerites in posterior part, numerous needle-shaped signa gathered in г-shaped band extending from bottom of corpus bursae to its 1/2 length, then angled and directed to1/2 length of the right margin of corpus bursae. Biology. Host plant unknown. Adults have been collected in the second part of October. Distribution. Thailand. Etymology. The species is named in honor of our friend Ole Karsholt, the well-known specialist for many Microlepidoptera families, who collected type series of this new species. Ole Karsholt is the author and editor of many important monographs on Microlepidoptera of Europe and other parts of the world.