plesiosauria

Ple`si*o*sau"ri*a, n. pl. Etym: [NL. See Plesiosaurus.] (Paleon.) Defn: An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; -- called also Sauropterygia.

plesiosauria - Similar Words

plesiosaurian plesiosaur plesiosaurus pelicosauria lepidosauria mesosauria pterosauria pleiosaurus pterosaurian enaliosauria