[dinosaur] Theropod jaws, morphological disparity (free pdf)

Ben Creisler
[email protected]

A new paper with free pdf:

Joep Schaeffer,  Michael J. Benton,  Emily J. Rayfield  & Thomas L. Stubbs
(2019)
Morphological disparity in theropod jaws: comparing discrete characters and
geometric morphometrics.
Palaeontology (advance online publication)
doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1111_pala.12455&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=Al90Btwd8FSj6zYhln20YDNGnIelHA42YyUSnqVGrrI&s=oyI3rM6AvI2HxSV8cEAVYlBDq5EH0xXT8Jpg0kIWoSg&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__onlinelibrary.wiley.com_doi_10.1111_pala.12455&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=Al90Btwd8FSj6zYhln20YDNGnIelHA42YyUSnqVGrrI&s=AFCz4F0Nxk-8bXcHDs7cCbIcCK12vPiOatehr1Q2yto&e= 

Free pdf:
https://urldefense.proofpoint.com/v2/url?u=https-3A__onlinelibrary.wiley.com_doi_pdf_10.1111_pala.12455&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=Al90Btwd8FSj6zYhln20YDNGnIelHA42YyUSnqVGrrI&s=3RntNM7Ez_dxeQP54x_1nzxhBOb-vYbs69XP8-ui_Ek&e= 


Data archiving statement:
Data for this study are available in the Dryad Digital Repository:
https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.5061_dryad.70rk2cf&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=Al90Btwd8FSj6zYhln20YDNGnIelHA42YyUSnqVGrrI&s=CA_LlujtLCcLq5pAMMcZaJ3AM7Gjv6thKgJ8DgrF78w&e= 


Disparity, the diversity of form and function of organisms, can be assessed
from cladistic or phenetic characters, and from discrete characters or
continuous characters such as landmarks, outlines, or ratios. But do these
different methods of assessing disparity provide comparable results? Here
we provide evidence that all metrics correlate significantly with each
other and capture similar patterns of morphological variation. We compare
three methods of capturing morphological disparity (discrete characters,
geometric morphometric outlines and geometric morphometric landmarks) in
coelurosaurian dinosaurs. We standardize our study by focusing all our
metrics on the mandible, so avoiding the risk of confounding disparity
methods with anatomical coverage of the taxa. The correlation is strongest
between the two geometric morphometric methods, and weaker between the
morphometric methods and the discrete characters. By using phylogenetic
simulations of discrete character and geometric morphometric data sets, we
show that the strength of these correlations is significantly greater than
expected from the evolution of random data under Brownian motion. All
disparity metrics confirm that Maniraptoriformes had the highest disparity
of all coelurosaurians, and omnivores and herbivores had higher disparity
than carnivores.


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