Plesiosaurus macrocephalus, juvenile Found by Mary Anning Argentinosaurus but was not seriously excavated

but was not seriously excavated for scientific study until the 1970's

and became smaller farther away from the jaw tips

may have been specialized to feed on mollusks

characteristic of herbivores

Plesiosaurus macrocephalus, juvenile Found by Mary Anning Argentinosaurus but was not seriously excavatedThis juvenile Plesiosaur is from the Jurassic of Lyme Regis, England. It was found by Mary Anning. Plesiosaurs (meaning "near lizard") were flippered marine reptiles from the Mesozoic Era they were not dinosaurs. Plesiosaurs are divided into two groups: the Plesiosauroids with long, snake like necks, tiny heads, and wide bodies, and the Pliosauroids, which had large heads with very strong jaws and short necks. The first plesiosaur skeletons were found