Opacoptera Gozmany , 1978

Yu, Shuai & Wang, Shuxia, 2023, Opacoptera Gozmany (Lepidoptera, Lecithoceridae) from China, with descriptions of four new species, ZooKeys 1158, pp. 133-146 : 133

Opacoptera Gozmany, 1978

Opacoptera Gozmány, 1978. Type species: Lecithocera callirrhabda Meyrick, 1936, by monotypy.

Generic characters.

Antenna as long as or slightly longer than forewing. Labial palpus with second palpomere thickened, third palpomere slender. Forewing narrowly elongate, usually dark brown with black patches; R1, R2 and R3 free, R4 and R5 stalked, M1, M2 and M3 separate, CuA1 and CuA2 short-stalked (Fig. 1 ) or separate (Fig. 2 ). Hindwing trapezoidal; M2 present, M3 and CuA1 coincident. All abdominal tergites with zones of spiniform setae.

Male genitalia. Cucullus narrowed, usually with a ventrobasal process. Juxta with horn-shaped or needle-like posterior lobes extending dorsad and smaller posterolateral lobes extending laterally. Aedeagus with two dorsal denticles; cornuti spiniform or needle-like.

Female genitalia. Antrum sclerotized along posterior margin forming a band. Signa of corpus bursae usually consisting of several teeth and a denticulate plate.

Diagnosis.

The genus is close to the monotypic genus, Monerista Meyrick, 1925. It can be distinguished by the trapezoidal hindwing without streak; whereas in Monerista , the lanceolate hindwing has a thinly scaled submedian streak ( Clarke 1965: 183, fig. 1)

Distribution.

China ( Gozmány 1978; Wu and Liu 1992; Wu 1996), Thailand ( Park and Kim 2021).

Remarks.

The generic characters of Opacoptera were originally defined by Gozmány (1978) based on the type species, Opacoptera callirrhabda (Meyrick, 1936). Wu (1996) gave the female characters of the genus. In this paper, we revised the generic characters including the forewing venation, male and female genitalia after examining all species of the genus.

Figures

Figures 1, 2. Wing venation of Opacoptera spp. 1 O. condensata sp. nov., holotype, male, slide No. LSR 12090 2 O. hybocentra sp. nov., paratype, male, slide No. YS 19431. Scale bars: 2.0 mm.