Americhelydia

Americhelydia is a clade of turtles that consists of sea turtles, snapping turtles, the Central American river turtle and mud turtles, supported by several lines of molecular work.^[4]^[5]^[6] Prior to these studies some morphological and developmental work have considered sea turtles to be basal members of Cryptodira and kinosternids related to the trionychians in the clade Trionychoidea.^[7]^[8] Americhelydia and Testudinoidea, both clades within Durocryptodira (hardshell turtles), split apart during the early Cretaceous.^[9]^[10]

Phylum:Chordata

Class:Reptilia

Order:Testudines

Suborder:Cryptodira

Quick facts Scientific classification, Subclades ...

Americhelydia Temporal range: Late Jurassic or Early Cretaceous to Holocene 149.5–0 Ma or 120–0 Ma^[1]^[2]^[3] PreꞒ Ꞓ O S D C P T J K Pg N

Common musk turtle (Sternotherus odoratus), a species of the family Kinosternidae
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Clade:	Americhelydia Crawford et al., 2014
Subclades
Chelydroidea Chelydridae Kinosternoidea Dermatemydidae Kinosternidae Panchelonioidea †Toxochelys †Protostegidae? †Ctenochelyidae Chelonioidea

[1]
Joyce, W. G., Parham, J. F., Lyson, T. R., Warnock, R. C., & Donoghue, P. C. (2013). A divergence dating analysis of turtles using fossil calibrations: an example of best practices. Journal of Paleontology, 87(04), 612-634.
[2]
"Protostegidae". The Paleobiology Database. Retrieved 27 July 2013.
[3]
Edwin A. Cadena and James F. Parham (2015). "Oldest known marine turtle? A new protostegid from the Lower Cretaceous of Colombia". PaleoBios. 32 (1): 1–42.
[4]
Chandler, C. H., & Janzen, F. J. (2009). The phylogenetic position of the snapping turtles (Chelydridae) based on nucleotide sequence data. Copeia, 2009(2), 209-213.
[5]
Barley, A. J., Spinks, P. Q., Thomson, R. C., & Shaffer, H. B. (2010). Fourteen nuclear genes provide phylogenetic resolution for difficult nodes in the turtle tree of life. Molecular Phylogenetics and Evolution, 55(3), 1189-1194.
[6]
Crawford, N. G., Parham, J. F., Sellas, A. B., Faircloth, B. C., Glenn, T. C., Papenfuss, T. J., ... & Simison, W. B. (2015). A phylogenomic analysis of turtles. Molecular Phylogenetics and Evolution, 83, 250-257.
[7]
Joyce, W. G. (2007). Phylogenetic relationships of Mesozoic turtles. Bulletin of the Peabody Museum of Natural History, 48(1), 3-102.
[8]
Werneburg, I., & Sánchez-Villagra, M. R. (2009). Timing of organogenesis support basal position of turtles in the amniote tree of life. BMC Evolutionary Biology, 9(1), 82.
[9]
Pereira, Anieli G.; Sterli, Juliana; Moreira, Filipe R.R.; Schrago, Carlos G. (August 2017). "Multilocus phylogeny and statistical biogeography clarify the evolutionary history of major lineages of turtles". Molecular Phylogenetics and Evolution. 113: 59–66. doi:10.1016/j.ympev.2017.05.008. hdl:11336/41137. ISSN 1055-7903. PMID 28501611.
[10]
Joyce, Walter G.; Rabi, Márton; Clark, James M.; Xu, Xing (2016-10-28). "A toothed turtle from the Late Jurassic of China and the global biogeographic history of turtles". BMC Evolutionary Biology. 16 (1): 236. doi:10.1186/s12862-016-0762-5. ISSN 1471-2148. PMC 5084352. PMID 27793089.

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