Limnoscelis

Limnoscelis (/limˈnäsələ̇s/, meaning "marsh footed") is an extinct genus of large diadectomorphtetrapods from the Late Carboniferous to early Permian of western North America. It includes two species: the type speciesLimnoscelis paludis from New Mexico, and Limnoscelis dynatis from Colorado, both of which are thought to have lived concurrently. No specimens of Limnoscelis are known from outside of North America. Limnoscelis was carnivorous, and likely semiaquatic, though it may have spent a significant portion of its life on land. Limnoscelis had a combination of derived amphibian and primitive reptilian features, and its placement relative to Amniota has significant implications regarding the origins of the first amniotes.