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Re: Large Ornithopod Dinosaur Tracks Ichnotaxonomic Review

After several days of inability, the PDF file of this announced
article is available today

Congrats to Ignacio Diaz-Martinez and his co-authors !!!

> Date: Thu, 12 Feb 2015 11:13:05 -0800
> From: Ben Creisler <bcreisler@gmail.com>
> To: dinosaur@usc.edu
> Subject: Large Ornithopod Dinosaur Tracks Ichnotaxonomic Review
> Ben Creisler
> bcreisler@gmail.com
> New in PLoS ONE:
> Ignacio Díaz-Martínez, Xabier Pereda-Suberbiola, Félix Pérez-Lorente &
> José Ignacio Canudo (2015)
> Ichnotaxonomic Review of Large Ornithopod Dinosaur Tracks: Temporal
> and Geographic Implications.
> PLoS ONE 10(2): e0115477
> doi:10.1371/journal.pone.0115477
> http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0115477
> Background
> Large ornithopod tracks are known from the Upper Jurassic to the
> uppermost Cretaceous rocks of all continents but Antarctica. They
> include the tracks historically called Iguanodon footprints,
> iguanodontid footprints, hadrosaur/hadrosaurid footprints, and other
> large ornithopod tracks that have been used to define ichnotaxa. More
> than 40 ichnospecies based on large ornithopod tracks have been
> defined, but the validity of many of them is questionable.
> Methodology/Principal Findings
> 34 ichnogenera and 44 ichnospecies have been analysed in this work.
> Many of them are considered to be invalid because they have been
> defined on the basis of poorly preserved tracks without diagnostic
> features, have an inadequate diagnosis, or are based on temporal
> and/or geographical criteria. Only eight ichnospecies belonging to the
> ichnogenera Caririchnium, Iguanodontipus and Hadrosauropodus are here
> regarded as valid.
> Conclusions/Significance
> The monospecific ichnogenus Iguanodontipus (I. burreyi) is
> characterized by a small, rounded heel and elongate, narrow digit
> impressions. Its distribution is limited to the Berriasian-Valanginian
> of Europe. Caririchnium consists of four ichnospecies (C. magnificum
> [type ichnospecies], C. kortmeyeri, C. billsarjeanti and C. lotus)
> with a large, rounded heel and short, wide digit impressions. This
> ichnogenus ranges from the Berriasian-Hauterivian to the Aptian-Albian
> of South America, North America, Asia and Europe. Finally,
> Hadrosauropodus (three ichnospecies: H. langstoni [type ichnospecies],
> H. leonardii and H. kyoungsookimi) shows a large, bilobed heel and
> short, wide digit impressions. It is known from the Aptian-Albian to
> the Maastrichtian of North America, Asia and Europe. The ichnofamily
> Iguanodontipodidae includes large iguanodontian tracks characterized
> mainly by mesaxonic, tridactyl and subsymmetrical pes tracks that are
> as wide as (or wider than) long and have one pad impression in each
> digit and one in the heel. Its distribution is confidently limited to
> the Cretaceous of Europe, Asia, North America and South America.