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Heteralex
Warren
Type species: aspersa
Warren (Peninsular Malaysia: Padang Rengas).
Synonyms: Canonistis Meyrick
and Monotaxia Warren (type species of both, rectilineata Guenée).
The genus consists of
three species of delicate build with white ground colour, delicately irrorated
and obliquely fasciated in greyish pink. The forewing apex is acute, and there
is a dark discal spot. The antennae of both sexes are unipectinate, those of the
male more strongly so in H. unilinea Swinhoe from. China, but in the male
only in the other two species. The unipectinate character is seen also in the
ennomine tribe Plutodini (Holloway, 1993[4]).
In
the male abdomen the type species has a central triangular patch of setae set
two thirds posteriorly on sternite 3, but this is absent in rectilineata. The
setation of the valve is reminiscent of that seen in some Baptini. The uncus is
slender, long, apically expanded and bifid, the socii moderate. The gnathus is
slender, longitudinally spined dorsally at the apex, a feature that is more
pronounced in H. rectilineata Guenée. The aedeagus vesica of both
species bears a patch of deciduous spicules.
In the female, the
pyriform bursa contains a typically ennomine signum that is opposed,
diagnostically for the genus, by an elliptical to elongate patch of densely
packed, short spines.
The monotypic genus Loxorhombia
Warren (type species idea Swinhoe) from Burma is also related.
Nothing is known of the biology.
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