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Clidastes2

Clidastes liodontus and a Toxocheylid turtle.

Clidastes is an extinct genus of mosasaur lizard from marine environments of the Late Cretaceous. Clidastes was the smallest of the mosasaurs, averaging 2-4 meters (7-12 feet) in length, with the largest specimens reaching 6.2 meters (20 feet) long.

DescriptionEdit

Clidastes proph1DB

Clidastes prophyton

Clidastes was an agile and fast swimmer that cruised the surface or shallow waters hunting for fish, flying reptiles and anything that got too close. It possessed a delicate and slim form with an expansion of the neural spines and chevrons near the tip of the tail and this enabled it to chase down the fastest of prey.

DiscoveryEdit

E. D. Cope discovered the first specimens in 1869 from the Mooreville Chalk in Lowndes County, Alabama.[5] The remains unearthed were that of a juvenile but are one of the best preserved and most complete mosasaurs collected from the state and is regarded as the generic holotype of Clidastes.[3] In 1918, Charles H. Sternberg and his son found additional remains of Clidastes in Kansas.[6] They were surprised to see that it had humeri and femora with round heads, similar to that of mammals. Due to good preservation of the caudals, Sternberg noted that the chevrons along the vertebrae were ankylosed to the center, which is not observed in other mosasaurs. This synapamorphy was believed to aid in fitting the proximal heads snugly into the basins that hew out from the vertebrae almost locking them in place.

Teeth and the Process of Tooth ReplacementEdit

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