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Ruttellerona pallicostaria Moore stat. rev
Angerona pallicostaria Moore, 1867, Proc. zool. Soc. Lond. 1867: 620.

Ruttellerona pallicostaria

Ruttellerona pallicostaria

Males have the forewing discal spot obscure amid a broad pale rufous zone along the costa; otherwise the species is very similar to R.. pseudocessaria. Dissection is therefore advisable, and the slender uncus, incurved band of spines on the sacculus and sinuous ventral margin to the costal zone of setae are diagnostic. The female has the pale zone on the hindwing tornus extending strongly to the centre of the margin; the genitalia have a lamella postvaginalis consisting of lateral lobes that scroll centrally into a posteriorly directed, apically bifurcate, tongue-like process.

Taxonomic notes. R. praeclararia Walker is based on a single female from S. India that shares the strong bifurcate tongue on the lamella postvaginalis, but this is broader and does not arise from such clear lateral lobes. R. cessaria Walker, based on a male from Sri Lanka (UM, Oxford) may be conspecific with praeclararia. This has similar facies to pallicostaria, but an apically bulbous uncus that bears a pair of 'sabre-tooth' processes, a valve with a single spinous lobe borne at the angle between the saccular sclerotisation and the transverse bar.

Geographical range. N.E. Himalaya, Peninsular Malaysia (Barlow (1982) as pseudocessaria), Borneo.

Habitat preference. The species is rarer than cessaria, with specimens seen from both lowland forest and lower montane forest.

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