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Ecliptopera Warren

Type species: triangulifera Moore, India.

Synonyms: Diactinia Warren (type species silaceata Denis & Schiffermüller, Europe); Urolopha Swinhoe (type species furva Swinhoe, India).

This genus consists mostly of species with a rather striking triangulated or otherwise compartmented forewing pattern, though section Urolopha has a more typically larentiine pattern with transverse fasciae. There is usually a flat, triangular marginal zone of dark brown. The hindwings are mostly plain, though often with a faint discal spot, and darker markings towards the margin and tornus. The male antennae are filiform.

The male genitalia are simple, the uncus tapering, acute, the valves tonguelike, with a strong setose lobe at the base of the costa (general to the Cidariinae of Pierce (1914) who interpreted them as lobes of the anellus). The aedeagus vesica contains a mass of small, needle-like cornuti. The abdomen has coremata in some species between the eighth segment and the genitalia: these are large in the second and third Bornean species listed, and these species also have a smaller pair between segments 7 and 8.

In the female genitalia the ductus is short, narrow, the bursa large, pyriform, with a narrow longitudinal band of sclerotisation bearing small, laterally directed spines.

Larvae of a number of Japanese species are illustrated in Sugi (1987). They are slender, smooth, tapering slightly from tail to head, various shades from green to mottled brown or lineated red. One species is specialist on Vitaceae, others feeding on Balsaminaceae and Onagraceae. European species are also noted as feeding on Onagraceae (Allan, 1949).

The genus contains several Holarctic species but has its greatest diversity in eastern Asia, particularly in warm temperate and subtropical latitudes. It does not extend east of Sulawesi, and its tropical representatives are usually montane.

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