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Etanna albisecta Hampson comb. n.
Nanaguna albisecta Hampson, 1905, Ann. Mag. nat. Hist. (7), 16: 583.
basalis Moore, 1885, Lepid. Ceylon, 3: 105, praeocc. (see basalis Walker above), syn. n.


Etanna albisecta

Etanna albisecta

This and the next species, vittalis Walker, show a similar sexual dimorphism of the forewing facies, but males of vittalis have a more angled antemedial and a more conspicuous distal pale edging to the anterior side of the postmedial. Females of vittalis are larger, brighter, with a somewhat more conspicuous pale edge (paler brown zone anterior to it) dividing the forewing longitudinally in half, that does not curve so sharply towards the costa at its basal end; there is a dark brown edging to the dorsum in the medial zone, rarely evident in albisecta. The male genitalia of the two species are very similar, but vittalis has a double arch structure just ventral to the uncus between the sides of the tegumen. In females the bursa is larger, with the spining more distinctly on one side.

Taxonomic note. The synonymy above reflects the sexual dimorphism of the species, albisecta being based on males and basalis on females. As the latter is subjectively preoccupied by E. basalis Walker (see above), albisecta is an available replacement name.

Geographical range. Indian Subregion to Queensland and the Solomons.

Habitat preference. Five specimens have been taken in recent surveys, two from a coastal area with mangrove in Brunei, one from lowland forest at Semengok in Sarawak, one from 900m on the limestone G. Api during the Mulu survey, and the last from 1618m on Bukit Retak in Brunei.

Biology. Robinson et al. (2001) noted Buchanania (Anacardiaceae) as a larval host.

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