Crassuncus is an Afrotropical genus of moths in the family Pterophoridae.

The genus was erected by C. Gibeaux in 1994 and is currently assigned to tribe Oidaematophorini.

[1] The genus has an Afrotropical distribution, with species recorded from Ethiopia, Kenya, Uganda, Tanzania, the Democratic Republic of the Congo, Malawi, Swaziland, Zimbabwe, South Africa and on Madagascar.

[1] As of version 1.1.23.125[update], the Catalogue of the Pterophoroidea of the World lists the following species for genus Crassuncus:[1]

This article on a moth of tribe Oidaematophorini is a stub.