Mamulichthys is an extinct genus of bony fish in the order Discordichthyiformes only known from the middle Permian of Russia. Like other members of its order, the fish differs from the majority of other bony fish due to the presence of fin spines on its pectoral and dorsal fins. The fish is one of the most complete members of the order, with the holotype specimen preserving a majority of the body, up to around the second dorsal fin. More recently, Mamulichthys has been though to potentially be a synonym of another member of the order ,Mutovinia, due to the similarities in their odontode shape.
Mamulichthys is an extinct genus of bony fish in the order Discordichthyiformes only known from the middle Permian of Russia. Like other members of its order, the fish differs from the majority of other bony fish due to the presence of fin spines on its pectoral and dorsal fins. The fish is one of the most complete members of the order, with the holotype specimen preserving a majority of the body, up to around the second dorsal fin. More recently, Mamulichthys has been though to potentially be a synonym of another member of the order ,Mutovinia, due to the similarities in their odontode shape. There is currently one species in the genus: M. ignotus.
== History and Classification == Mamulichthys was described by A. V. Minikh in 2014 based on the holotype and only specimen (SGU, no. 104B/3190) that was found in Amanak Formation located in the Orenburg Region of Russia. The locality the material is from, referred to as the Kichkass locality, was originally a copper mine dump only to be excavated decades later by the Research Institute of Geology of SGU during the summers of 1984-1987. The remains of Mamulichthys, along with a number of other fish from the locality, were collected as part of these excavations in 1985. The holotype specimen is laterally compressed and preserved the front section of the fish. Even with these more incomplete remains compared to many other fossil fish, the remains present make Mamulichthys the most complete member of the order Discordichthyiformes. A 2025 publication by A. S. Bakaev and coauthors suggested that the genus could be a synonym of another taxon in the order, Mutovinia stella, due to the shape of the odontodes on the dermal bones of the specimen.
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