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Plesiosaurus with a human to scale. Compared to other plesiosaur genera, Plesiosaurus has a small head. The skull is much narrower than long, [7] reaching its greatest width just behind the eyes (the postorbital bar). [8] The anterior portion is "bluntly triangular". [8] In lateral view, the skull reaches its highest point at the rear of the ...
While plesiosaurs varied little in the build of the trunk, and can be called "conservative" in this respect, there were major differences between the subgroups as regards the form of the neck and the skull. Plesiosaurs can be divided into two major morphological types that differ in head and neck size.
The skull of Unktaheela has unusually large orbits, a feature commonly associated with juvenile animals. However, many anatomical characteristics of the known specimens indicate that they belonged to fully grown individuals. For example, many bones are fused in the specimens that are typically unfused in juvenile plesiosaurs.
Elasmosaurus differed from all other plesiosaurs by having 72 neck vertebrae; more may have been present but were later lost to erosion or after excavation. Only Albertonectes had more neck vertebrae, 76, and the two are the only plesiosaurs with a count higher than 70; more than 60 vertebrae is very derived (or "advanced") for plesiosaurs. [15 ...
Cryptoclididae is a family of medium-sized plesiosaurs that existed from the Middle Jurassic to the Early Cretaceous. They had long necks, broad and short skulls and densely packed teeth. They fed on small soft-bodied preys such as small fish and crustaceans.
Everhart resumed the study of the partially digested plesiosaur skull bones, FHSM VP-13966. He sought the expertise of Ken Carpenter due to his relevant 1996 paper on short-necked plesiosaurs. Carpenter identified the bones as probable Dolichorhynchops remains. [31] Noe published another study of Pachycostasaurus. He changed his mind regarding ...
When Anning was 12 years old, her older brother Joseph found a peculiar fossilized skull. After that, Anning searched long and hard and eventually found the entire outline of an Ichthyosaur ...
Cryptoclidus was a medium-sized plesiosaur, with the largest individuals measuring up to 4 m (13 ft) long and weighing about 737–756 kg (1,625–1,667 lb). [ 1 ] [ 9 ] The fragile build of the head and teeth preclude any grappling with prey, and suggest a diet of small, soft-bodied animals such as squid and shoaling fish.
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