New pelomedusoid turtles from the late Palaeocene Cerrejón Formation of Colombia and their implications for phylogeny and body size evolution

@article{Cadena2012NewPT,
  title={New pelomedusoid turtles from the late Palaeocene Cerrej{\'o}n Formation of Colombia and their implications for phylogeny and body size evolution},
  author={Edwin Alberto Cadena and Daniel T. Ksepka and Carlos Jaramillo and Jonathan I. Bloch},
  journal={Journal of Systematic Palaeontology},
  year={2012},
  volume={10},
  pages={313 - 331}
}
  • E. CadenaD. Ksepka J. Bloch
  • Published 17 May 2012
  • Environmental Science, Geography, Biology
  • Journal of Systematic Palaeontology
Pelomedusoides comprises five moderate-sized extant genera with an entirely Southern Hemisphere distribution, but the fossil record of these turtles reveals a great diversity of extinct taxa, documents several instances of gigantism, and indicates a complex palaeobiogeographical history for the clade. Here, we report new pelomedusoid turtle fossils from the late Palaeocene Cerrejón Formation of Colombia. The most complete of these is represented by a large skull (condylobasal length = 16 cm… 

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References

SHOWING 1-10 OF 66 REFERENCES

ARE EXTANT PODOCNEMIDID TURTLES RELICTS OF A WIDESPREAD CRETACEOUS ANCESTOR?

This new phylogenetic hypothesis places B. elegans as a basal form of Podocnemididae and is used to found a new biogeographic model for the Pelomedusoides, which allows the association of vicariance events of Gondwana fragmentation during the Cretaceous with the isolation of pelomedusoid lineages.

PHYLOGENETIC RELATIONSHIPS OF THE BAURU GROUP TURTLES (LATE CRETACEOUS OF SOUTH-CENTRAL BRAZIL)

The resulting hypothesis of relationships places the specimen known as FR-4922 and Brasilemys josai among Pelomedusoides basal to Podocnemoidea, and a sister group relationship between Peltocephalus dumerilianus and Erymnochelys madagascariensis is proposed.

Phylogenetic Relationships of Mesozoic Turtles

This revised topology has important implications for the evolution of several character complexes, because it implies that the common ancestor of all living turtles must have had a partially braced brain case and a primitive trochlear mechanism.

The oldest pre-Podocnemidid turtle (Chelonii, Pleurodira), from the early Cretaceous, Ceará state, Brasil, and its environment

The turtle fauna in Chapada do Araripe includes four freshwater Pelomedusoides, samples of the ancient northern Gondwana fauna, as well as a cryptodiran turtle, possibly a littoral form belonging to a more cosmopolitan group, which dates between the late Aptian fauna of Gadoufaoua (Niger) and the late Albian-early Cenomania fauna from the Sahara.

Caninemys, A New Side-Necked Turtle (Pelomedusoides: Podocnemididae) from The Miocene of Brazil

A new genus and species of podocnemidid pleurodire, Caninemys tridentata, is described on the basis of a skull collected by L.I. Price in 1962 from the late Miocene of Acre, Brazil, which has previously been identified as the shell-based genus Stupendemys, but there are no associations supporting this assignment.

A New Baenid Turtle from the Upper Cretaceous (Maastrichtian) Hell Creek Formation of North Dakota and a Preliminary Taxonomic Review of Cretaceous Baenidae

A fragmentary skull from the Hell Creek Formation of southwestern North Dakota represents a new taxon of baenid turtle named herein Gamerabaena sonsalla, which has several morphological features that are intermediate between Plesiobaena antiqua and the morphologically disparate Palatobaena spp.

Impact of increased character sampling on the phylogeny of Cetartiodactyla (Mammalia): combined analysis including fossils

The phylogenetic position of Cetacea (whales, dolphins and porpoises) is an important exemplar problem for combined data parsimony analyses because the clade is ancient and includes many well‐known

Evolution of the Side-Necked Turtles: The Family Podocnemididae

The family Podocnemididae is reconfirmed as monophyletic, using the unique possession of a cavum pterygoidei formed by the basisphenoid, pterygoid, prootic, and quadrate, and the resulting consensus of nine equally parsimonious cladograms is the basis for a new classification of the family.

Side-Necked Turtle Lower Jaws (Podocnemididae, Bothremydidae) from the Late Cretaceous Maevarano Formation of Madagascar

The oldest record of Erymnochelys or a taxon very similar to it is indicated, the persistence of a Mesozoic element in the extant Malagasy turtle fauna is indicated and the possible bothremydid jaw suggests a more cosmopolitan element now extinct.
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