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This list of plesiosaurs is a comprehensive listing of all genera that have ever been included in the order Plesiosauria, excluding purely vernacular terms.The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names, and genera that ...
It appears to be the most common species of plesiosaur in the Lias Group of England. [24] Plesiosaurus is best represented from the "upper part of the Blue Lias , the 'Shales with Beef,' and the lower Black Ven Marls" the latter of which form part of the Charmouth Mudstone ; using the Lias Group ammonite fossil zones, these rocks date to the ...
The fact that the osteology of the plesiosaur's neck makes it absolutely safe to say that the plesiosaur could not lift its head like a swan out of water as the Loch Ness monster does, the assumption that air-breathing animals would be easy to see whenever they appear at the surface to breathe, [146] the fact that the loch is too small and ...
The species was first studied 200 years ago, but little was known about the external anatomy of the plesiosaur until the newest fossil was discovered. Plesiosaur fossils can be found all over the ...
Early Albian [12] Early Albian [12] Life restoration of two Nichollssaura borealis: Pahasapasaurus haasi. Cenomanian [13] Cenomanian [13] Cenomanian [13] Plesiopleurodon wellesi. Earliest Cenomanian [14] Earliest Cenomanian [14] Cenomanian, [11] Earliest Cenomanian [14] Life restoration of Plesiopleurodon wellesi: Plesiosaurus dolichodeirus ...
On 12 August 2011, researchers from the U.S. described a fossil of a pregnant plesiosaur found on a Kansas ranch in 1987. [11] The plesiosauroid, Polycotylus latippinus , has confirmed that these predatory marine reptiles gave birth to single, large, live offspring—contrary to other marine reptile reproduction which typically involves a large ...
Hydrotherosaurus was a medium-sized plesiosaur, measuring approximately 7.8–8 metres (25.6–26.2 ft) long. [2] [3] It has one of the longest necks relative to total length among elasmosaurids, with 60 vertebrae in total. It had a small head that measured about 33 centimetres (13 in; 1.08 ft) long, a streamlined body, and four large flippers ...
The Plesiosauridae are a monophyletic family of plesiosaurs named by John Edward Gray in 1825. [1] [2] References paleontology portal; This page was last edited on 1 ...