Clostera dorsalis Walker

Ichthyura dorsalis Walker 1862, J.Linn. Soc. Lond. Zool. 6: 134.

Pygaera geminata Gaede 1930: 647, syn. n.

Clostera dorsalis Walker.; Kiriakoff, 1968: 254.

Diagnosis

The species varies from brown to deep indigo in forewing colour but can be distinguished by the large, dark, round reniform and the course of the postmedial, flexed at one third from the costa, not quite parallel to the margin, being nearer to it at the tornus than at the apex.

Taxonomic notes

The species forms a natural group with C. tapa Roepke (Java) which has much paler hindwings and slightly different genitalia (see description of the synonymous C.deldeni by Kiriakoff (1960)), and an undescribed species from Sulawesi (BM notodontid slide 1170).

Geographical range

Borneo, Sumatra.

Habitat preference

Three specimens where habitat was recorded were from lower montane forest on limestone (G. Api), and, from lowland Brunei, dry heath forest and mixed dipterocarp forest.

Genitalia: