plesiosauria Synonyms

suborder plesiosauria mosasauridae plesiosaurids plesiosauromorph plesiosauromorpha ichthyosauria plesiosauromorphic plesiosauromorphists livyatan kentriodon plesiosaur plesiosaurian Mysticeti Odontoceti basilosaurus genus Plesiosaurus ambulocetus brygmophyseter plesiosauromorphologically