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Peratostega Warren
Gen. rev.
Type species: coctata Warren.
This genus has been placed in synonymy with Auzeodes, but shows
differences from it that are as great as those separating both from Danala.
The facies is of the same dull reddish brown colour as that of the
previous two genera, but it lacks any modifications to the wing shape. The male
antennae are filiform, ciliate.
In the male genitalia the coremata of the valve are single. The main
part of the valve is short, triangular, almost cupulate, with a double spur from
the sclerotised ventral angle. There is a short saccus. The small aedeagus
vesica has a broad scobinate band running longitudinally. The eighth segment is
unmodified.
The female has the bursa pyriform with the signum bearing a straight
flange that is bifid or bilobed, and there is some scobination basally near the
ductus. The ductus is narrow but is set within a broad ostium created by a
crescent-shaped lamella antevaginalis that is often thickened, corrugate; there
is no lamella postvaginalis.
The group is here expanded to include two mainland
Oriental species P. deletaria Moore comb. n. and P. indistincta Moore
comb. n. previously assigned to Cassyma, together with a related new
species from Borneo. The genitalic features are generally compatible with those
discussed above; the valve shape is variable, but there is an apically spurred
ventral portion to the main part, that is less pronounced. The diagnostic
features of the signum and lamella antevaginalis are present, though the latter
is more sclerotised, less corrugate.
The host-plant of P. deletaria is given as Quercus
(Fagaceae) in Inoue et al.(1982).
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