Pseudancistrus sidereus

Stellantia siderea is a species of armored catfish known only from the upper Orinoco basin in Amazonas state, Venezuela. It is the only member of the monospecific genus Stellantia, which forms a tribe with its also monotypic sister genus Colossimystax.

This is a fairly large loricariid (up to standard length), and is distinguished from its congeners by a strong keel on the caudal peduncle and the colour scheme which is generally very dark with bright white or yellow spots on the upperside.