Gyrtona nama Swinhoe, 1900, Ann. Mag. nat. Hist. (7), 7:
Diagnosis. Both this and the next species are relatively slender with an asymmetric
pale yellow angular mark at the forewing apex; the forewing reniform is edged
paler distally and, to a much lesser extent, proximally. The distinction from brunnama
is given in the description of that species.
Taxonomic notes. The transfer of this species to Lophoptera, made by Sugi in Inoue
et al (1982), is supported by the possession of the generic characters
mentioned in the introductory section, though the appendix bursae is relatively
small, set at one third on a very long ductus.
The taxon acrogramma Turner (N.E. Australia, New Guinea) is very
similar in facies to nama except for a yellow triangle just posterior to
the apical mark, and also has very similar male genitalia with a dorsal
concavity at the apex of the valve; it may be best placed as a subspecies of nama.
The concavity of the valve is also seen in specimens from Sulawesi which
have somewhat deeper forewings, a less angled postmedial and a greater
development of the secondary yellow triangle; these specimens (e.g. slide 11323)
may also be best placed as a subspecies of nama.
Geographical range. N.E. Himalaya, Taiwan, Borneo, Sumatra, Bali, and
possibly with races further east.
Habitat preference. Only three Bornean specimens have been taken
recently, two from upper montane forest on G. Mulu, Sarawak, and Bukit Retak,
Brunei, and the other from lowland rainforest at Labi, Brunei.
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