Editing Arctometatarsal

[[File:T. rex versus A. atrox feet.JPG|thumb|''[[Tyrannosaurus]]'' foot showing the compressed arctometatarsalian condition of the middle [[metatarsal]], compared to that of ''[[Allosaurus]]'']]
An '''arctometatarsalian''' organism is one in which the [[Anatomical_terms_of_location#Proximal_and_distal|proximal]] part of the middle [[metatarsal]] is pinched between the surrounding metatarsals. The trait appears to be highly [[Homoplasy|homoplastic]], common in certain sorts of [[dinosaur]]s accustomed to running (among them the [[tyrannosauroids]], [[ornithomimosaurs]], and [[troodontids]]), to evenly transmit force to the metatarsals.<ref>{{cite web|url=http://www.bio.ucalgary.ca/contact/faculty/pdf/russell/274.pdf |title=Evolutionary morphology of the coelurosaurian arctometatarsus: descriptive, morphometric and phylogenetic approaches |accessdate=2009-10-24 |url-status=dead |archiveurl=https://web.archive.org/web/20110706210837/http://www.bio.ucalgary.ca/contact/faculty/pdf/russell/274.pdf |archivedate=2011-07-06 }}</ref><ref>Snively, E. (2000). [http://dspace.ucalgary.ca/bitstream/1880/40646/1/64980Snively.pdf ''Functional morphology of the tyrannosaurid arctometatarsus''] {{Webarchive|url=https://web.archive.org/web/20160723234039/http://dspace.ucalgary.ca/bitstream/1880/40646/1/64980Snively.pdf |date=2016-07-23 }}. University of Calgary.</ref>

==References==
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[[Category:Evolutionary biology concepts]]
[[Category:Vertebrate anatomy]]
[[Category:Skeletal system]]
[[Category:Dinosaur anatomy]]


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