Carboniferous sarcopterygians

Baphetoidea is a superfamily of stem-tetrapods. It includes the family Baphetidae and several more basal genera such as Eucritta and Spathicephalus (which has been given its own family Spathicephalidae). The superfamily has also been called Loxommatoidea, but this name is a junior synonym of Baphetoidea.

The Urocordylidae are an extinct family of nectridean lepospondyl amphibians. Urocordylids lived during the Late Carboniferous and Early Permian in what is now Europe and North America and are characterized by their very long, paddle-like tails. In life, they were probably newt-like and aquatic.

Megalichthyiformes is an extinct clade of basal tetrapodomorphs which first appeared during the Devonian period. It was named in 2010 by Michael I. Coates and Matt Friedman, who defined it as a stem-based taxon containing all tetrapodomorphs closer to Megalichthys than to Eusthenopteron.