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Achrosis multidentata Warren comb. n. 
Prionia multidentata Warren, 1894, Novit. zool., 1: 449.
Prionia excavata Warren, 1896, Novit. zool. 3: 449.
Sabaria multidentata Warren; Holloway, 1976: 77.

Achrosis multidentata

Achrosis multidentata

The forewing margin is strongly angled. The forewing and all except a basal yellow zone of the hindwing (much reduced in the larger female) are strongly and darkly speckled blackish brown on a fawn ground, most heavily over the costal half and at the antemedial of the forewing. The male has a submarginal row of fawn lunules over the posterior two thirds of the forewings.

Taxonomic notes. The furca of the male genitalia is asymmetric, and the aedeagus vesica has two groups of robust cornuti, both unusual features in the genus.

Geographical range. Nias, Sumatra, Borneo.

Habitat preference. A. multidentata is often common in a wide range of lowland forest types. It is rarely encountered at altitude, though a female was taken at 1618m on Bukit Retak, Brunei.

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