Nygmia atereta Collenette
atereta Collenette, 1932,
Novit. zool., 38: 58.
Diagnosis. The facies is much as in some Somena or Orvasca species (See
Orvasca Walker Gen.rev), but the body is more robust. Identity of this and the next species
is best confirmed from the genitalia, which are strikingly different from those
of the other two genera as illustrated.
Taxonomic note. The male genitalia of this species, the next and N. mignon Schintlmeister
comb. n. (Sumatra) and an undescribed species from Java (slide 2657) all
have very similar structure, particularly the pair of slender rods arising from
between the valve bases and the juxta.
Geographical range. Sundaland.
Habitat preference. The species has been recorded from both lowland and
lower montane (to 1000m) forest zones; during the Mulu survey it was somewhat
more frequent on the limestone G. Api.
Biology. Chey (1994: 281) identified a reared specimen as limbata Butler (See Orvasca subnotata) that may be the female of atereta.
The larva is also illustrated by Chey and is blackish with a broad dorsal
yellow stripe divided by a central red line. This stripe is faint over the
thoracic segments. The black secondary setae arise from black verrucae that are
speckled white. The dorsal line is broken by paired verrucae on the first,
second and eighth abdominal segments, but these are absent from other segments.
The host-plant was Paraserianthes falcataria (Leguminosae).
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