[dinosaur] Crocodyliform snout form and function (free pdf)

Ben Creisler
[email protected]

A new paper with free pdf:

Free pdf:


Stephanie K Drumheller & Eric W Wilberg (2019)
A synthetic approach for assessing the interplay of form and function in
the crocodyliform snout.
Zoological Journal of the Linnean Society, zlz081 (advance online
publication)
doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1093_zoolinnean_zlz081&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=zd_g1U205qEs7MJz11pSVkWa8YI0vCPrKu6LXxuRyfQ&s=cUVT7EyyMXYezNZL6-UvZSahsmZtDJBUCyTEiVFqWRk&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__academic.oup.com_zoolinnean_advance-2Darticle_doi_10.1093_zoolinnean_zlz081_5579349&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=zd_g1U205qEs7MJz11pSVkWa8YI0vCPrKu6LXxuRyfQ&s=Dr-uyWkW7QygsYOdcyz38lFu-VeoT10Iyy-uOLkDnko&e= 



Existing classifications of snout shape within Crocodylia are supported by
functional studies, but ecological surveys often reveal a higher than
expected diversity of prey items within putatively specialist groups, and
research into bite force and predation behaviour does not always reveal
significant differences between snout shape groups. The addition of more
distantly related crocodyliforms complicates the ecomorphological signal,
because these groups often occupy a larger area of morphospace than the
crown group alone. Here, we present an expanded classification of snout
shapes and diets across Crocodyliformes, bringing together geometric
morphometrics, non-hierarchical cluster analyses, phylogenetic analyses,
ancestral state reconstructions, ecological surveys of diet, and feeding
traces from the fossil record to build and test predictive models for
linking snout shape and function across the clade. When applied to living
members of the group, these new classifications partition out based on
differences in predator body mass and maximal prey size. When applied to
fossils, these classifications predict potential prey items and identify
possible examples of scavenging. In a phylogenetic context, these ecomorphs
reveal differences in dietary strategies and diversity within major
crocodyliform clades. Taken together, these patterns suggest that
crocodyliform diversity, in terms of both morphology and diet, has been
underestimated.

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