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The two types are related to the traditional strict division of the Plesiosauria into two suborders, the long-necked Plesiosauroidea and the short-neck Pliosauroidea. Modern research, however, indicates that several "long-necked" groups might have had some short-necked members or vice versa.
It is distinguishable by its small head, long and slender neck, broad turtle-like body, a short tail, and two pairs of large, elongated paddles. It lends its name to the order Plesiosauria, of which it is an early, but fairly typical member. It contains only one species, the type, Plesiosaurus dolichodeirus.
Plesiosauroidea (/ ˈ p l iː s i ə s ɔːr /; Greek: πλησιος plēsios 'near, close to' and σαυρος sauros 'lizard') is an extinct clade of carnivorous marine reptiles.They have the snake-like longest neck to body ratio of any reptile.
The neck of Tanystropheus was composed of 13 elongated neck vertebrae, [14] whereas the neck of Dinocephalosaurus was composed of at least 27 neck vertebrae that were not as elongated. Among the 27 vertebrae of Dinocephalosaurus , the longest was the nineteenth, which measured approximately 91 mm (3.6 in) long.
The skull of a pliosaur, a prehistoric sea monster, was discovered on a beach in Dorset, England, and it could reveal secrets about these awe-inspiring creatures.
Officers at Fort Wallace, Kansas, in 1867.Theophilus H. Turner, who the same year discovered Elasmosaurus in the area, is second from left.. In early 1867, the American army surgeon Theophilus Hunt Turner and the army scout William Comstock explored the rocks around Fort Wallace, Kansas, where they were stationed during the construction of the Union Pacific Railroad.
Remains of Europe's largest-ever land-based dinosaur have been discovered on the Isle of Wight in England, University of Southampton scientists say.
The skeleton of an extinct prehistoric reptile predator, known as a sea dragon, is the largest and most complete ever discovered in the U.K., researchers said Monday.
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