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Protome, new phytosaur from Upper Triassic Chinle Formation, Arizona



From: Ben Creisler
bcreisler@gmail.com

Also in the new JVP:

Michelle R. Stocker (2012)
A new phytosaur (Archosauriformes, Phytosauria) from the Lot’s Wife
beds (Sonsela Member) within the Chinle Formation (Upper Triassic) of
Petrified Forest National Park, Arizona.
Journal of Vertebrate Paleontology 32(3): 573-586
DOI:10.1080/02724634.2012.649815
http://www.tandfonline.com/doi/abs/10.1080/02724634.2012.649815


A new phytosaur taxon from Petrified Forest National Park, Arizona, is
here described based on cranial material from a single individual.
This specimen previously was included in an extensive phylogenetic
analysis, and it was found to possess a combination of character
states that differs from all known phytosaur taxa in addition to two
autapomorphies within the braincase and an autapomorphy of the
mandible. The new taxon adds to the taxonomic diversity recognized
from the Sonsela Member of the Chinle Formation. The continued
increase in phytosaur diversity emphasizes the need to more accurately
characterize and identify taxa within a phylogenetic systematic
context in order to produce a more refined signal for biostratigraphic
correlations, biochronologic inferences, and faunal dynamics during
the Late Triassic.