A Review of the Fossil Record of Turtles of the Clades Platychelyidae and Dortokidae

Cadena, Edwin Alberto; Joyce, Walter

doi:https://doi.org/10.3374/014.056.0101

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A Review of the Fossil Record of Turtles of the Clades Platychelyidae and Dortokidae

https://repository.urosario.edu.co/handle/10336/27786
https://doi.org/10.3374/014.056.0101

Autores

Cadena, Edwin Alberto

Joyce, Walter

Fecha

2015-04-01

Editor

BioOne complete

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Abstract

The fossil record of platychelyid turtles expands from the Late Jurassic (Oxfordian) of Cuba to the Early Cretaceous (Valanginian) of Colombia. Platychelyids were adapted to freshwater to coastal environments. Current phylogenies confidently suggest that platychelyids are situated along the stem lineage of crown Pleurodira. A taxonomic review of the group concludes that of six named “platychelyid” taxa, four are valid and two are nomina nuda. Dortokids are a poorly understood group of freshwater aquatic turtles that are restricted to the Early Cretaceous (Barremian) to Eocene (Lutetian) of Europe. The phylogenetic position of the group is still under debate, but there is some evidence that these turtles are positioned along the stem lineage of crown Pleurodira as well. A taxonomic review of the group concludes that of four named dortokid taxa, two are valid, one is a nomen invalidum and one a nomen nudum.