 The category covers all the non-dinosaurian reptiles which are often erroneously considered to be dinosaurs, such as the seafaring varieties of plesiosaurs and the flying pterosaurs.Also included are ancient crocodiles such as "Deinosuchus".For information on the synapsids, which were previously known as "mammal-like reptiles" (including the well-known "Dimetrodon"), which are not part of the clade Sauropsida (with which "Reptilia" is generally synonymized), see Synapsid (amniotes related to mammals).