Type species: cinerea Holloway
There are a number of small, delicate, round-winged, grey or brown
species in Aroa Walker that are misplaced there (See
Sundaroa Gen.n.) and share
features of facies and male genitalia. Apart from being rounded, the forewing
has a broad space between Sc and Rs, with R2 to R4 branching off in the distal
third of the distance from the cell to the apex. In the hindwing, both M1 + Rs
and M3 + CuA1 are stalked. The forewing facies has a darker discal spot,
postmedial and antemedial fasciae irregular in course and, distal to the former
and basal to the latter, darker grey patches at the costa and dorsum. The margin
has a series of darker grey patches separated by pale grey along the veins.
These markings are strong in cinerea, more obscure in other species. The
male antennae are particularly strongly bipectinate.
The male abdomen lacks tymbals. The genitalia have a simple, rather
digitate uncus, a long saccus, and narrow, digitate, setose valves that appear
to be fused ventrally with the rather tricornute juxta that supports the
aedeagus somewhat ventrally to the valves. Females have not been located.
Other species referable to the genus are P. shelfordi Collenette comb.
n. (Peninsular Malaysia) and P. tisdala Swinhoe comb. n.
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