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. Cadena, D. 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… 
View on Taylor & Francis
paleot.weebly.com
34 Citations
Highly Influential Citations
3
Background Citations
14
Methods Citations
1

34 Citations

Citation Type

Citation Type

New turtle remains from the Late Cretaceous of Monte Alto-SP, Brazil, including cranial osteology, neuroanatomy and phylogenetic position of a new taxon
A high diversity of land vertebrates is known from the Late Cretaceous deposits of the Bauru Basin, Brazil, including at least five turtle taxa, all belonging to the clade Podocnemidoidae. Some of…
Valanginian occurrence of Pelomedusoides turtles in northern South America: revision of this hypothesis based on a new fossil remain
TLDR
A new fragmentary specimen from the Rosa Blanca Formation, represented by a right portion of the shell bridge, including the mesoplastron and most of peripherals 5 to 7, allows me to support its attribution as belonging to Pelomedusoides, a group to which the previously podocnemidoid material is also attributed here.
A global phylogeny of Pelomedusoides turtles with new material of Neochelys franzeni Schleich, 1993 (Testudines, Podocnemididae) from the middle Eocene, Messel Pit, of Germany
TLDR
A revised diagnosis for the species is presented here, together with its inclusion in a global phylogenetic analysis of Pelomedusoides that shows that this species and the whole Neochelys spp.
The last marine pelomedusoids (Testudines: Pleurodira): a new species of Bairdemys and the paleoecology of Stereogenyina
TLDR
A new Stereogenyina species is described, based on an almost complete skull from the middle Miocene Capadare Formation, of Venezuela, and it is proposed that stereogenyins were a marine radiation of podocnemidid turtles, as corroborated by previous studies of fossil eggs and limb morphology.
A new turtle from the Upper Cretaceous Bauru Group of Brazil, updated phylogeny and implications for age of the Santo Anastácio Formation
The largest Cretaceous podocnemidoid turtle (Pleurodira) revealed by an isolated plate from the Bauru Basin, south-central Brazil
Abstract The Bauru Basin (south-central Brazil) fossils have largely contributed to understand the faunal composition of South American Cretaceous. Among those, several turtle specimens were…
Early to Middle Miocene Turtles from the Northernmost Tip of South America: Giant Testudinids, Chelids, and Podocnemidids from the Castilletes Formation, Colombia
Abstract. Here we describe the northernmost South American record of fossil turtles from the late early Miocene to early middle Miocene of the Castilletes Formation, on the Alta Guajira Peninsula,…
First report of a bothremydid turtle, Sindhochelys ragei n. gen., n. sp., from the early Paleocene of Pakistan, systematic and palaeobiogeographic implications
ABSTRACT We report the discovery of remains of a large chelonian from the base of the early Paleocene Khadro Formation exposed in the Ranikot Fort area (Ranikot Group, Sindh Province, Southern…
A new blunt-snouted dyrosaurid, Anthracosuchus balrogus gen. et sp. nov. (Crocodylomorpha, Mesoeucrocodylia), from the Palaeocene of Colombia
TLDR
A new exceptionally brevirostrine dyrosaurid is described from the middle Palaeocene Cerrejón Formation, northeastern Colombia, based on four partial skulls and associated postcrania, which indicates a deviation from surface-based predation to sub-surface predation as in modern Gavialis.
The anatomy, paleobiology, and evolutionary relationships of the largest extinct side-necked turtle
TLDR
The findings suggest the existence of a single giant turtle species across the northern Neotropics, but with two shell morphotypes, suggestive of sexual dimorphism, and bite marks and punctured bones indicate interactions with large caimans that also inhabited the northern Nebraska.
...
...

References

SHOWING 1-10 OF 66 REFERENCES
ARE EXTANT PODOCNEMIDID TURTLES RELICTS OF A WIDESPREAD CRETACEOUS ANCESTOR?
TLDR
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)
TLDR
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
TLDR
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
TLDR
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
TLDR
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
TLDR
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…
Molecular phylogeny and divergence times of ancient South American and Malagasy river turtles (Testudines: Pleurodira: Podocnemididae)
Evolution of the Side-Necked Turtles: The Family Podocnemididae
TLDR
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.
A New Small Short-Snouted Dyrosaurid (Crocodylomorpha, Mesoeucrocodylia) from the Paleocene of Northeastern Colombia
TLDR
An African origin of Dyrosauridae with dispersals to the New World by the Late Cretaceous or earliest Paleocene is supported and a radiation of dyrosaurid crocodyliforms, possibly following the K-P boundary, in tropical South America is suggested.
...
...