The Latimeriidae are thought to be the sister group to the Mawsoniidae, an extinct family of coelacanths that survived until the Late Cretaceous, inhabited both freshwater and marine habitats, and contained some very large species. Together, both comprise the suborder Latimerioidei.
The Latimeriidae are believed to be closely related to the Mawsoniidae, a group of extinct coelacanths that thrived in both freshwater and marine habitats during the Late Cretaceous period. They were known for their size, with some species reaching impressive proportions. Both groups belong to the suborder Latimerioidei.