Search results
Results from the WOW.Com Content Network
Elasmosaurus is known from the Sharon Springs Member of the Campanian-age Upper Cretaceous Pierre Shale formation of western Kansas, which dates to about 80.5 million years ago. The Pierre Shale represents a period of marine deposition from the Western Interior Seaway , a shallow continental sea that submerged much of central North America ...
Elasmosauridae is an extinct family of plesiosaurs, often called elasmosaurs.They had the longest necks of the plesiosaurs and existed from the Hauterivian to the Maastrichtian stages of the Cretaceous, and represented one of the two groups of plesiosaurs present at the end of the Cretaceous alongside Polycotylidae.
The following other wikis use this file: Usage on en.wikisource.org Page:North American Plesiosaurs- Elasmosaurus, Cimoliasaurus, and Polycotylus.pdf/23
A photograph of a front flipper of Plesioelasmosaurus, taken in the 1930s by George F. Sternberg, was captioned as belonging to "a large plesiosaur, which would have measured from 40 to 60 feet in length" (12.2 to 18.3 m).
Cope's Elasmosaurus with its head on the tail and lacking hindlimbs. In 1867, physician Theophilus Turner near Fort Wallace in Kansas uncovered a plesiosaur skeleton, which he donated to Cope. [25] Cope attempted to reconstruct the animal on the assumption that the longer extremity of the vertebral column was the tail, the shorter one the neck.
English: Size comparison of the North American Upper Cretaceous elasmosaurid plesiosaur Elasmosaurus platyurus. Unknown regions have been restored after Albertonectes and Styxosaurus. The diver silhoutte from File:Scuba33.jpg, which is by NOAA and in the public domain.
In November 2010, hunter David Bradt stumbled on an elasmosaur fossil at the bottom of a narrow canyon on the Charles M. Russell National Wildlife Refuge.Before it could be salvaged in the spring of 2011, the shale nodule was partly destroyed by flooding.
Restoration Detail of Thalassomedon skull at the American Museum of Natural History. Thalassomedon is among the largest elasmosaurids, with the holotype measuring 10.86 metres (35.6 ft) long and weighing more than 4.44 metric tons (4.89 short tons).