Evolutionary trends in Triceratops from the Hell Creek Formation, Montana.
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ABSTRACT:
SUBMITTER: Scannella JB
PROVIDER: S-EPMC4104892 | biostudies-other | 2014 Jul
REPOSITORIES: biostudies-other
Publications
Evolutionary trends in Triceratops from the Hell Creek Formation, Montana.
Scannella John B JB Fowler Denver W DW Goodwin Mark B MB Horner John R JR
Proceedings of the National Academy of Sciences of the United States of America 20140630 28
The placement of over 50 skulls of the well-known horned dinosaur Triceratops within a stratigraphic framework for the Upper Cretaceous Hell Creek Formation (HCF) of Montana reveals the evolutionary transformation of this genus. Specimens referable to the two recognized morphospecies of Triceratops, T. horridus and T. prorsus, are stratigraphically separated within the HCF with the T. prorsus morphology recovered in the upper third of the formation and T. horridus found lower in the formation. H ...[more]
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