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Clostera
angularis Snellen
Ichthyura angularis Snellen
1895, Dt. ent. Zeitschr., Iris 8: 128.
Clostera angularis Snellen;
Kiriakoff, 1968: 253; Barlow, 1982: 65.
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Clostera
angularis (Sumatra)
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Diagnosis. The
forewings are generally pale brown but there is a medium brown (paler in the
Sumatran female illustrated here; Barlow (1982) illustrated the male) apical
patch bounded basad by a distinctive, straight, pale fascia.
Taxonomic note. This is probably the sister species of the N. E.
Himalayan C. transecta Dudgeon which has a similar apical patch to the
forewing. C. hildora Schaus from the Philippines is also related.
Geographical range. Sundaland.
Habitat preference. Bornean
records are limited to a single worn male taken in alluvial forest at Long Pala
(50 m) in the G. Mulu National Park, Sarawak.
Biology. The larva of the related C. transecta was
described by Hampson (1904 J. Bombay nat. Hist. Soc. 16: 150). The larva
is grey-brown with humps on abdominal segments 1 and 8 that are dark brown and
contain two pale red tubercles in a red patch. There is a broad dorsal
dirty-white line that is interrupted by the humps. There are white patches on
each side of the anterior hump and lateral and sublateral series of yellow-brown
tubercles, a pale line occurring above the lateral series. The head is dark
brown and the whole larva is clothed with whitish hair.
Pupation is in a cocoon spun amongst leaves of the food-plant, Salix.
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