Ethmia anfracta, Zhu & Wang, 2022

Zhu, Xiaoju & Wang, Shuxia, 2022, Study of the genus Ethmia Hübner, [1819] (Lepidoptera: Ethmiidae) from China with descriptions of six new species, Zootaxa 5194 (2), pp. 176-192 : 188-191

Ethmia anfracta sp. nov.

( Figs 9 , 19 )

Type material. CHINA, Taiwan: Holotype ♂, Kao Hsiung 1–2 km W Meishan, 870 m, VI.29–VII.2.1980, leg. D. R.Davis, slide No. ZXJ20168.

Diagnosis. The new species is similar to E. maculifera ( Matsumura, 1931) in forewing pattern and male genitalia. It can be distinguished by the forewing with a sub-ovate spot near the base and with a black spot at the distal 1/3 of the cell not connected with the spot at outer margin of the cell; and the ventral margin of the sacculus convex before middle in the male genitalia. In E. maculifera , the forewing has a rectangular spot at the base and a spot in the distal 1/3 of the cell that is connected with the spot at outer margin of the cell; and the ventral margin of the sacculus is convex at the middle ( Sattler 1967: 130, fig. 68).

Description. Adult ( Fig. 9 ). Wingspan 21.0 mm.

Head: Vertex and frons greyish white; neck pale grey, blackish brown at middle. Labial palpus pale grey; basal palpomere greyish brown dorsally; second palpomere greyish brown in basal half on inner surface; third palpomere greyish brown dorsally. Antenna with scape pale grey, mixed with blackish brown; flagellum black.

Thorax: Collar pale grey, black basally. Mesonotum pale grey, with paired black spots basally and distally. Tegula pale grey, with a black spot at base. Forewing yellowish grey, overlaid with nine black spots: sub-ovate spot near base; small dot at basal 1/3 below costal margin; cell with spot at distal 1/3 and at out margin of cell, not connected; fold with spot at middle; a black spot near base of wing above fold; three distal spots arranged in a triangle; eight marginal dots extending from distal part of costal margin along termen to tornus; fringe concolourous with wing. Hindwing grey; fringe greyish white. Legs greyish white; coxa of foreleg yellowish grey ventrally, femur and tibia blackish brown dorsally, tarsus blackish brown, white at base and at apex of basal tarsomere; femur of midleg mixed with blackish brown dorsally, with a blackish brown spot at apex, tibia blackish brown dorsally, tarsus blackish brown.

Abdomen: Male genitalia ( Fig. 19 ) with uncus shield-shaped, narrower distally. Tegumen height shorter than uncus. Gnathos shorter than uncus; caudal part well developed, with long spines on posterior margin; oral part reduced. Labis slender clavate, blunt at apex; about half length of uncus. Valva with costa 3/4 length of valva, wider basally, dilated before apex dorsally; sacculus obtuse-triangular, ventral margin convex before middle, with two long spines apically, about 1/3 length of cucullus; cucullus a long curved spine, slightly shorter than valva, hooked at apex. Juxta a narrow band, posterolateral lobes narrowed, pointed apically. Phallus tubular, curved basally; cornutus absent.

Female unknown.

Distribution. China (Taiwan).

Etymology. The specific epithet is derived from the Latin anfractus, referring to the shape of the cucullus.

Figures

FIGURES 5–9. Adults of Ethmia spp.5, E. crocosoma, ♂; 6, E. rectiuga sp. nov., holotype, ♂; 7, E. transtimacula sp. nov., holotype, ♂; 8, E. vietmiella, ♀; 9, E. anfracta sp. nov., holotype, ♂. Scales = 5.0 mm.

FIGURES 16–19. Male genitalia of Ethmia spp. 16, E. susa, slide No. ZXJ20134; 17, E. transtimacula sp. nov., holotype, slide No. ZXJ19660; 18, E. vietmiella, slide No. ZXJ20210; 19, E. anfracta sp. nov., holotype, slide No. ZXJ20168. Scales = 0.5 mm.