achaeopsis microdesma Prout, 1928, Bull. Hill Mus. Witley, 2: 173.
microdesma Berio as ‘sp. n.’ in Berio & Fletcher, 1958: 335.
microdesma Berio; Kobes, 1985: 68.
Diagnosis. The wings are very much darker overall
than in brevicauda, of which microdesma was originally
thought to be a variant or subspecies. It is best distinguished by the two
curved fasciae in the medial zone that converge in the centre of the wing, and
are further apart at the margins; these fasciae can be fawn or grey, and the
outer one includes a distinct paler sector within the cell, and diverges outwards
around the inner margin of the much narrower equivalent of the costal bar of brevicauda.
Taxonomic note. Prout originally described microdesma as a subspecies.
This was overlooked by Berio, who redescribed it as a new species. The
authorship is therefore reassigned to Prout.
Geographical range. Sumatra,
Peninsular Malaysia, Borneo.
Habitat preference. This is a rarer species than brevicauda, known from two
specimens from 1000m on G. Mulu and three from 1618m on Bukit Retak.
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