Mamulichthys is an extinct genus of prehistoric bony fish that lived during the Urzhumian stage (Guadalupian/middle Permian epoch) in what is now European Russia (Orenburg Oblast). The type and only species, M. ignotus, is known from a single specimen preserving the skull and anterior body portion, which was recovered from the uppermost part of the Amanak Formation.
Classification
Together with Discordichthys, Geryonichthys, and Mutovinia, Mamulichthys is placed in the family Discordichthyidae in the monotypic order Discordichthyiformes.They are endemic to the Permian of European Russia and characterized by their peculiar skull morphology, and the presence of dorsal and pectoral fin spines (two of each). They could be stem Actinopterygii, relict forms that survived into the Permian.