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Re: Scoring cursorial limb proportions in carnivorous dinosaurs (free pdf)

A number of news stories:

Figuring Out a Dinosaur’s Speed


Top 10 Fastest Dinosaurs


Nanotyrannus as fastest theropod



On Wed, Jan 27, 2016 at 8:03 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
> A new paper:
> W. Scott Persons IV & Philip J. Currie (2016)
> An approach to scoring cursorial limb proportions in carnivorous
> dinosaurs and an attempt to account for allometry.
> Scientific Reports 6, Article number: 19828 (2016)
> doi:10.1038/srep19828
> http://www.nature.com/articles/srep19828
> From an initial dataset of 53 theropod species, the general
> relationship between theropod lower-leg length and body mass is
> identified. After factoring out this allometric relationship, theropod
> hindlimb proportions are assessed irrespective of body mass.
> Cursorial-limb-proportion (CLP) scores derived for each of the
> considered theropod taxa offer a measure of the extent to which a
> particular species deviates in favour of higher or lower running
> speeds. Within the same theropod species, these CLP scores are found
> to be consistent across multiple adult specimens and across disparate
> ontogenetic stages. Early theropods are found to have low CLP scores,
> while the coelurosaurian tyrannosauroids and compsognathids are found
> to have high CLP scores. Among deinonychosaurs, troodontids have
> consistently high CLP scores, while many dromaeosaur taxa, including
> Velociraptor and Deinonychus, have low CLP scores. This indicates that
> dromaeosaurs were not, overall, a particularly cursorily adapted
> group. Comparisons between the CLP scores of Tyrannosaurus and
> specimens referred to the controversial genus Nanotyrannus indicate a
> strong discrepancy in cursorial adaptations, which supports the
> legitimacy of Nanotyrannus and the previous suggestions of ecological
> partitioning between Nanotyrannus and the contemporaneous
> Tyrannosaurus.