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We rode bikes for a few km out of town to the excellent museum at the Centro de Investigaciones Paleontologicas. Across the street is another great museum called "El Fossil", which has a really great origin story.
Large water reptile whose name means "Near Lizard." They ranged in size from 8' to 40' long. Some had small heads with long nexks and paddle-like limbs. Of the Mesozoic Era.
Just to clarify, "Plesiosaur" refers to the order Plesiosauria (class Reptilia or Sauropterygia), not to a specific genus or species (for example, Plesiosaurus), which can be subdivided into Plesiosauroids and Pliosauroids. They were technically not dinosaurs.
Hatched on 2008.06.17
The Plesiosaurus is a genus of extinct, large marine sauropterygian reptile that lived during the early part of the Jurassic period, and is known by nearly complete skeletons from the Lias of England between 200 million and 65 million years ago.