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They had a worldwide oceanic distribution, and some species at least partly inhabited freshwater environments. [6] Plesiosaurs were among the first fossil reptiles discovered. In the beginning of the nineteenth century, scientists realised how distinctive their build was and they were named as a separate order in 1835.
It contains only one species, the type, Plesiosaurus dolichodeirus. Other species once assigned to this genus, including P. brachypterygius , P. guilielmiimperatoris , and P. tournemirensis have been reassigned to new genera, such as Hydrorion , Seeleyosaurus and Microcleidus .
This list of plesiosaurs is a comprehensive listing of all genera that have ever been included in the order Plesiosauria, excluding purely vernacular terms.The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names, and genera that ...
Pravoslavlev recognized another species from New Zealand, E. hoodii, named by Owen in 1870 as Plesiosaurus hoodii based on a neck vertebra. [62] Welles recognized it as a nomen dubium in 1962; [33] Joan Wiffen and William Moisley concurred in a 1986 review of New Zealand plesiosaurs. [63] In 1949 Welles named a new species of Elasmosaurus, E ...
Elasmosauridae, often called elasmosaurs or elasmosaurids, is an extinct family of plesiosaurs that lived from the Hauterivian stage of the Early Cretaceous to the Maastrichtian stage of the Late Cretaceous period (c. 130 to 66 mya).
"A new elasmosaurid from the early Maastrichtian of Angola and the implications of girdle morphology on swimming style in plesiosaurs". Netherlands Journal of Geosciences. 94 (1): 109– 120. Bibcode:2015NJGeo..94..109A. doi: 10.1017/njg.2014.44. S2CID 86616531.
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Plesiosaurus brachypterygius. N/A N/A GPIT von Huene 1923, pls 1–2 Plesiosaurus dolichodeirus. Plesiosaurus. N/A BMNH 22656 United Kingdom BMNH 22656: Plesiosaurus guilelmiimperatoris. N/A N/A MB. 1893/94.1961 [Holotype] O Plesiosaurus macromus. N/A N/A OXFUM J.28587 Seeleyosaurus holzmadensis. N/A SMNS 12039