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History
Elasmosauridae
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Elasmosauridae is an extinct family of plesiosaurs, often called elasmosaurs. They had the longest necks of the plesiosaurs and existed from the Hauterivian to the Maastrichtian stages of the Cretaceous, and represented one of the two groups of plesiosaurs present at the end of the Cretaceous alongside Polycotylidae.
Restoration of Thalassomedon haningtoni.
Restoration of Thalassomedon haningtoni.
Plesiosaur
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The Plesiosauria or plesiosaurs are an order or clade of extinct Mesozoic marine reptiles, belonging to the Sauropterygia.
Image: Paleo Hall at HMNS plesiosaur
Image: Paleo Hall at HMNS plesiosaur
Image: Peloneustes philarchus Tubingen
Image: Peloneustes philarchus Tubingen
First published plesiosaur skeleton, 1719 (specimen NHMUK PV R.1330)
First published plesiosaur skeleton, 1719 (specimen NHMUK PV R.1330)
As this illustration shows, Conybeare by 1824 had gained a basically correct understanding of plesiosaur anatomy.
As this illustration shows, Conybeare by 1824 had gained a basically correct understanding of plesiosaur anatomy.