Type species: personaria Walker (= heteroneurata Guenée).
Synonym: Nustidava Walker (type species, unilineata Walker
= heteroneurata Guenée).
This genus shows strong sexual dimorphism in the shape and venation of
the wings. The female is of typical Eutoeini morphology, but the male has the
forewing apex produced, acute, and the hindwing dorsal zone much enlarged. The
hindwing cell is smaller, with Rs at its anterior margin more strongly bowed
than in the female. The space between M1 and M3 is narrowed, with M3 curved
round dorsal submarginally to run almost parallel to the margin, which it
reaches proximal to CuA1 where there is a slight angle. On the forewing
underside there is a trio of small ridges or folds set obliquely in the foveal
position. The male antennae are ciliate.
The male genitalia resemble those of the next two genera in having a
small lobe or other structure between the two arms of the valves. In Eutoea it
is corematous and broadly overlaps the ventral arm to the exterior. The three
genera also resemble each other in possession of subapical processes on the
ventral arms of the valve. The aedeagus vesica contains numerous moderate
The female genitalia have the bursa spherical with a lateral zone
slightly sclerotised, but no signum.
The genus contains the widespread type species, discussed below, and E.
heteromorpha Warren from New Guinea, represented only by the male holotype,
which has venational modification less extreme than in the type species, with
more regular wing margins (concave on the forewing).
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