Emarginachelys

Emarginachelys; Temporal range: Maastrichtian PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Clade:	Americhelydia
Genus:	†Emarginachelys; Whetstone, 1978
Species:	†E. cretacea
Binomial name
	†Emarginachelys cretacea; Whetstone, 1978

Emarginachelys cretacea is a turtle belonging to the group Cryptodira, known from well preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana.[1] Its exact phylogenetic position within Cryptodira is uncertain; different authors considered it to be either the earliest described chelydrid[2][3] or a fossil relative of kinosternoids.[4][5][6]

References

Emarginachelys cretacea, Paleobiology Database
Kenneth N. Whetstone (1978). "A new genus of cryptodiran turtles (Testudinoidea, Chelydridae) from the Upper Cretaceous Hell Creek Formation of Montana". University of Kansas Science Bulletin. 51 (17): 539–563. doi:10.5962/bhl.part.17248.
Georgia E. Knauss; Walter G. Joyce; Tyler R. Lyson; Dean Pearson (2011). "A new kinosternoid from the Late Cretaceous Hell Creek Formation of North Dakota and Montana and the origin of the Dermatemys mawii lineage". Paläontologische Zeitschrift. 85 (2): 125–142. doi:10.1007/s12542-010-0081-x.
Peter A. Meylan; Eugene S. Gaffney (1989). "The skeletal morphology of the Cretaceous cryptodiran turtle, Adocus, and the relationships of the Trionychoidea". American Museum Novitates. 2941: 1–60. hdl:2246/5096.
Walter G. Joyce (2016). "A Review of the Fossil Record of Turtles of the Clade Pan-Chelydridae" (PDF). Bulletin of the Peabody Museum of Natural History. 57 (1): 21–56. doi:10.3374/014.057.0103.
Walter G. Joyce; Jason R. Bourque (2016). "A Review of the Fossil Record of Turtles of the Clade Pan-Kinosternoidea" (PDF). Bulletin of the Peabody Museum of Natural History. 57 (1): 57–95. doi:10.3374/014.057.0104.

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[1] Emarginachelys cretacea, Paleobiology Database

[2] Kenneth N. Whetstone (1978). "A new genus of cryptodiran turtles (Testudinoidea, Chelydridae) from the Upper Cretaceous Hell Creek Formation of Montana". University of Kansas Science Bulletin. 51 (17): 539–563. doi:10.5962/bhl.part.17248.

[3] Georgia E. Knauss; Walter G. Joyce; Tyler R. Lyson; Dean Pearson (2011). "A new kinosternoid from the Late Cretaceous Hell Creek Formation of North Dakota and Montana and the origin of the Dermatemys mawii lineage". Paläontologische Zeitschrift. 85 (2): 125–142. doi:10.1007/s12542-010-0081-x.

[4] Peter A. Meylan; Eugene S. Gaffney (1989). "The skeletal morphology of the Cretaceous cryptodiran turtle, Adocus, and the relationships of the Trionychoidea". American Museum Novitates. 2941: 1–60. hdl:2246/5096.

[5] Walter G. Joyce (2016). "A Review of the Fossil Record of Turtles of the Clade Pan-Chelydridae" (PDF). Bulletin of the Peabody Museum of Natural History. 57 (1): 21–56. doi:10.3374/014.057.0103.

[6] Walter G. Joyce; Jason R. Bourque (2016). "A Review of the Fossil Record of Turtles of the Clade Pan-Kinosternoidea" (PDF). Bulletin of the Peabody Museum of Natural History. 57 (1): 57–95. doi:10.3374/014.057.0104.