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Derambila
zanclopterata Walker
Acidalia (?) zanclopterata
Walker, 1863, List Specimens lepid. Insects Colln Br. Mus., 26:
1609.
In facies this species resembles the next, having a general brownish
suffusion over the wings, concentrated along the forewing costa. The postmedials
are sinuous rows of clearer brown patches, bulging towards the margin centrally.
The clearer brown is more or less free of the brown suffusion unlike in the next
species where it tends to concentrate it. The principal diagnostic feature is
the shape and ornamentation of the female bursa: this is bilobed, complexly
sclerotised, with spines in two circular arrays as well as more irregularly
distributed.
Taxonomic notes. The holotype (UM Oxford) is a female with all except half a hindwing
missing. Fortunately, the abdomen was present, enabling the identity to be
established.
A male (10mm) from Dinding I. off the coast of Perak, Peninsular
Malaysia, may be of this species. The facies matches and the genitalia (slide 17040) have the central spine of the valve apically slightly
sinuous, reaching the centre of the costal process. The aedeagus vesica is
unfortunately damaged, but is similar to that of saponaria and costata.
Geographical range. Borneo, Bangka I., Sumatra, ?Peninsular Malaysia.
Habitat preference. The holotype female is from Sarawak, and there is a
further female from Bidi in the coastal lowlands of Sarawak.
Bangka is a low lying island off the south east coast of Sumatra.
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