Moths of the Amazon
species ref 396 )
Xenosoma sp, Manu cloudforest, 1400m, Peru ©
The tiny eyes, pectinate antennae and wing venation indicate that
this species is a member of the subfamily Pericopinae, which
comprises of about 300 known species, all of which are neotropical
in distribution. Many of them are diurnal and very brightly
coloured, but there are also a number of less colourful nocturnal
genera such as Xenosoma.
There are 8
described Xenosoma species.
The very distinctive venation of the species shown above closely
matches the specimen of giganteum
illustrated by Druce in Biologia Centrali Americana but that species
is not listed by the Global Lepidoptera Names Index under
Xenosoma or any possible synonymous
genus. The yellowish thorax and black abdominal stripe are only
present in one other Xenosoma species.
i.e. progonum, but the latter has dark
wing margins. This therefore appears to be an undescribed
I have only encountered this species in Peru but I know of an
identical specimen from Paraguay.
The larvae of Pericopinae are generally brightly coloured and have
barbed tubercles arising from the mesothorax. They feed on various
Fabaceae, Asclepiadaceae, Apocyanaceae and Boraginaceae. The pupae
are ornate, and are formed within a flimsy cocoon.