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Titanosaur femur from Texas



From: Ben Creisler
bcreisler@gmail.com

A new paper:


Steven L. Wick & Thomas M. Lehman (2014)
A complete titanosaur femur from West Texas with comments regarding
hindlimb posture.
Cretaceous Research 49: 39-44
doi: http://dx.doi.org/10.1016/j.cretres.2014.02.003
http://www.sciencedirect.com/science/article/pii/S019566711400010X


An isolated titanosaur femur recovered from the Javelina Formation
(Maastrichtian) of Big Bend National Park, Texas is the most complete
example yet reported from North America. The specimen is likely
referable to Alamosaurus sanjuanensis, the only titanosaur thus far
known from Upper Cretaceous strata in North America, but cannot be
attributed with certainty to that taxon. Compared to femora from other
titanosaurs, the specimen has a relatively reduced abductor crest, a
less elevated femoral head, and a distal joint surface that is
orthogonal to the long axis of the shaft. These differences suggest
that the Big Bend femur pertains to a species where hindlimb stance
was closer to vertical, and with a comparatively narrower gait than
other titanosaurids.