Plesiochelys
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''Plesiochelys'' ("near turtle") is a genus of late
Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...
European and Asian turtle. The type species is ''Plesiochelys etalloni''. Fossil records have discovered ''Plesiochelys bigleri'' and ''Plesiochelys etalloni'' from the
Kimmeridge Clay The Kimmeridge Clay is a sedimentary rock, sedimentary deposit of fossiliferous marine clay which is of Late Jurassic to lowermost Cretaceous age and occurs in southern and eastern England and in the North Sea. This rock formation (geology), form ...
of England and outside the Swiss and French Jura Mountains. A recent studyEvers, S. W., & Benson, R. B. (2019). A new phylogenetic hypothesis of turtles with implications for the timing and number of evolutionary transitions to marine lifestyles in the group. ''Palaeontology'', 62(1), 93–134. placed ''Plesiochelys'' as an Angolachelonia and outside
Testudines Turtles are reptiles of the order (biology), order Testudines, characterized by a special turtle shell, shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Crypt ...
.


References


Sources

*Gaffney, Eugene S. "A taxonomic revision of the Jurassic turtles Portlandemys and Plesiochelys. ''American Museum Novitates''; no. 2574." (1975).


External links

* Late Jurassic reptiles of Europe Thalassochelydia Late Jurassic turtles Late Jurassic reptiles of Asia Fossil taxa described in 1873 {{paleo-turtle-stub