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RE: Phylogeny of Basal Iguanodonts



Based on this article, what dinosaur species is the best candidate for trackmaker producing the ichnogenus Caririchnium-like footprints in "mid-Cretaceous" North America?


On Tue, May 22, 2012 at 5:05 PM, Ben Creisler wrote:

From: Ben Creisler
bcreisler@gmail.com

New in PLoS ONE:

Andrew T. McDonald (2012)
Phylogeny of Basal Iguanodonts (Dinosauria: Ornithischia): An Update.
PLoS ONE 7(5): e36745.
doi:10.1371/journal.pone.0036745

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0036745


The precise phylogenetic relationships of many non-hadrosaurid members
of Iguanodontia, i.e., basal iguanodonts, have been unclear.
Therefore, to investigate the global phylogeny of basal iguanodonts a
comprehensive data matrix was assembled, including nearly every valid
taxon of basal iguanodont. The matrix was analyzed in the program TNT,
and the maximum agreement subtree of the resulting most parsimonious
trees was then calculated in PAUP. Ordering certain multistate
characters and omitting taxa through safe taxonomic reduction did not
markedly improve resolution. The results provide some new information
on the phylogeny of basal iguanodonts, pertaining especially to
obscure or recently described taxa, and support some recent taxonomic
revisions, such as the splitting of traditional “Camptosaurus” and
“Iguanodon”. The maximum agreement subtree also shows a close
relationship between the Asian Probactrosaurus gobiensis and the North
American Eolambia, supporting the previous hypothesis of faunal
interchange between Asia and North America in the early Late
Cretaceous. Nevertheless, the phylogenetic relationships of many basal
iguanodonts remain ambiguous due to the high number of taxa removed
from the maximum agreement subtree and poor resolution of consensus
trees.