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Plesioelasmosaurus is an extinct genus of elasmosaurid plesiosaur from the Late Cretaceous (middle Cenomanian) Greenhorn Limestone of Kansas, United States. The genus contains a single species, P. walkeri, known from a partial skeleton. [1]
Bones of Leptocleidus superstes: Yuzhoupliosaurus chengjiangensis. Bathonian [11] Bathonian [11] Bathonian [11] Brancasaurus brancai. Berriasian [5] Berriasian [5] Berriasian [5] Skeleton of Brancasaurus brancai: Muraenosaurus leedsi. Callovian [5] Callovian [5] Callovian [5] Life restoration of Muraenosaurus leedsi: Cryptoclidus richardsoni ...
Illustration of the skeletal anatomy of a Plesiosaurus dolichodeirus from Conybeare's 1824 paper that described an almost complete plesiosaur skeleton found by Mary Anning in 1823. Plesiosaurus was a moderately sized plesiosaur that grew to 2.87–3.5 m (9.4–11.5 ft) in length.
Generally, the parietal bones were very large, with a midline crest, while the squamosal bones typically formed an arch, excluding the parietals from the occiput. The eye sockets were large, in general pointing obliquely upwards; the pliosaurids had more sideways directed eyes.
Elasmosaurus was one of few plesiosaurs known from the New World at the time, and the first recognized member of the long-necked family of plesiosaurs, the Elasmosauridae. [ 2 ] In 1869 Cope scientifically described and figured Elasmosaurus , and the preprint version of the manuscript contained a reconstruction of the skeleton which he had ...
Terminonatator (meaning "last swimmer") is a genus of elasmosaurid plesiosaur from the Late Cretaceous of Saskatchewan, Canada.It is known from a skull and partial skeleton from a young adult, found in the Campanian-age Bearpaw Formation near Notukeu Creek in Ponteix.
This genus of plesiosaur lived in North America, approximately 95 million years ago - this places it during the Cenomanian stage. Its closest relative is Elasmosaurus, and both belong to the family Elasmosauridae. There are six specimens of varying states of preservation on display at various museums in the United States.
Pliosaurus brachydeirus is the (combinatio nova of the) type species of the genus. It was first described and named by the English paleontologist Richard Owen in 1841, as a species of the wastebasket taxon Plesiosaurus in its own subgenus Pleiosaurus, creating Plesiosaurus (Pleiosaurus) brachydeirus. [5]