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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 skull table. [9] "
The belief that plesiosaurs are dinosaurs is a common misconception, and plesiosaurs are often erroneously depicted as dinosaurs in popular culture. [ 141 ] [ 142 ] It has been suggested that legends of sea serpents and modern sightings of supposed monsters in lakes or the sea could be explained by the survival of plesiosaurs into modern times.
Letter concerning the discovery of the 1823 Plesiosaurus, from Mary Anning.. This timeline of plesiosaur research is a chronologically ordered list of important fossil discoveries, controversies of interpretation, taxonomic revisions, and cultural portrayals of plesiosaurs, an order of marine reptiles that flourished during the Mesozoic Era.
Researchers from Lund University in Sweden have been analyzing the soft tissue from a 183 million-year-old plesiosaur for the first time in history after the fossil was found intact near Holzmaden ...
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. [14 ...
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 ...
Plesiosaurs were ocean-going reptiles that were contemporaries of the dinosaurs, living from the Late Triassic to the end of the Cretaceous Period. Geology: Prehistoric plesiosaurs were penguins ...
Plesiosaurs are present from two different families within Plesiosauroidea in the Niobrara Chalk: the Polycotylidae, or short-necked plesiosaurs, and the Elasmosauridae, or long-necked plesiosaurs. Polycotylids superficially resemble pliosaurs , which are not present within the formation, but are unrelated.