A new kinosternoid from the Late Cretaceous Hell Creek Formation of North Dakota and Montana and the origin of the Dermatemys mawii lineage

@article{Knauss2011ANK,
  title={A new kinosternoid from the Late Cretaceous Hell Creek Formation of North Dakota and Montana and the origin of the Dermatemys mawii lineage},
  author={Georgia E. Knauss and Walter G. Joyce and Tyler R. Lyson and Dean A. Pearson},
  journal={Pal{\"a}ontologische Zeitschrift},
  year={2011},
  volume={85},
  pages={125-142}
}
A nearly complete turtle shell from the Late Cretaceous (Maastrichtian) Hell Creek Formation of Slope County, North Dakota, represents the most complete remains to date of a Mesozoic kinosternoid turtle and a new species, Hoplochelys clark nov. sp. The new taxon is diagnosable from other representatives of Hoplochelys by the plesiomorphic placement of the humeral/femoral sulcus behind the hyo/hypoplastral suture and the autapomorphic development of an interrupted median (neural) keel. All six… Expand

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References

SHOWING 1-10 OF 38 REFERENCES
Early Kinosterninae (Reptilia: Testudines) and their phylogenetic significance
TLDR
The morphology of the fossil forms bridges much of the morphological gap between the extant Kinosterninae and Staurotypinae. Expand
Late Cretaceous and early Paleocene turtles of the Denver Basin, Colorado
The record of turtles in the Denver Basin spans four formations (Fox Hills, Laramie, Arapahoe, and Denver) that range from Late Cretaceous (Lancian) to early Paleocene (Puercan) in age. We recognizeExpand
Patterns of geographic variation in latest Cretaceous vertebrates: Evidence from the turtle component
Turtles are among the most widespread, abundant, and diverse fossil vertebrate groups in the latest Cretaceous. On the basis of new data from the Hell Creek Formation (North Dakota) and Lance andExpand
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. Expand
Paleocene turtle remains from South Carolina
THE TURTLE FAUNA FROM the Williamsburg Formation of the Paleocene of South Carolina is the most diverse yet known from the Paleocene of eastern North America, although this may reflect the mixedExpand
Diversity of turtles across the cretaceous/tertiary boundary in Northeastern Montana
Abstract The abundant chelonian faunas of the Hell Creek and Tullock formations of McCone and Garfield counties, Montana, span the Cretaceous/Tertiary boundary and provide a basis for assessingExpand
Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression
The Hell Creek and Fort Union Formations in southwestern North Dakota and northwestern South Dakota have yielded a diverse megaflora of 380 species from 158 quarry sites. These sites are situated inExpand
The complete mitochondrial genome of the enigmatic bigheaded turtle (Platysternon): description of unusual genomic features and the reconciliation of phylogenetic hypotheses based on mitochondrial and nuclear DNA
TLDR
This study robustly determines the phylogenetic placement of Platysternon and provides a well-resolved outline of major turtle lineages, while demonstrating the significantly greater resolving power of comparing large amounts of mt sequence over that of short fragments. Expand
Lithostratigraphy of the Hell Creek Formation in North Dakota
In North Dakota, the Hell Creek Formation is a Laramide clastic wedge of primarily nonmarine strata intercalated with marine and brackish facies. The formation ranges in thickness from 100 to 60 m onExpand
Tests of turtle phylogeny: molecular, morphological, and paleontological approaches.
TLDR
Branch-length analysis and independent dates from the fossil record suggest that these unresolved nodes may represent a rapid radiation of the major cryptodiran lineages 90-120 million years ago. Expand
...
1
2
3
4
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