Romeriida

Romeriida is a clade of reptiles that consists of diapsids and the extinct protorothyridid genus Paleothyris, if not the entire family Protorothyrididae. It is phylogenetically defined by Laurin & Reisz (1995) as the last common ancestor of Paleothyris and diapsids, and all its descendants. It is named after Alfred Romer, a prominent vertebrate paleontologist of the twentieth century. Below is a cladogram showing the placement of Romeriida within Amniota, modified from Hill, 2005: Cladogram after Müller & Reisz, 2006: Polyphyletic Protorothyrididae

Romeriida

Romeriida is a clade of reptiles that consists of diapsids and the extinct protorothyridid genus Paleothyris, if not the entire family Protorothyrididae. It is phylogenetically defined by Laurin & Reisz (1995) as the last common ancestor of Paleothyris and diapsids, and all its descendants. It is named after Alfred Romer, a prominent vertebrate paleontologist of the twentieth century. Below is a cladogram showing the placement of Romeriida within Amniota, modified from Hill, 2005: Cladogram after Müller & Reisz, 2006: Polyphyletic Protorothyrididae