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      A review of large Cretaceous ornithopod tracks, with special reference to their ichnotaxonomy : Large Cretaceous ornithopod tracks

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          Tetrapod Footprint Biostratigraphy and Biochronology

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            Dinosaur Tracks and Other Fossil Footprints of the Western United States

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              Discriminating between Medium-Sized Tridactyl Trackmakers: Tracking Ornithopod Tracks in the Base of the Cretaceous (Berriasian, Spain)

              Background Recent work on the Jurassic-Cretaceous transition of the Iberian Range (Spain) has opened a new window onto the interpretation of the trackmakers of some medium-sized tridactyl tracks. The ichnotaxon Therangospodus oncalensis has been described in the Huérteles Formation (Berriasian) and is one of the classical tracks from the area assigned to medium-sized theropods. Methodology/Principal Findings A review of the type locality of Therangospodus oncalensis (Fuentesalvo tracksite) and other tracksites from the Huérteles Formation (Berriasian) has yielded new information on the morphology, gait and trackmaker identity of the aforementioned ichnospecies. The new data suggest that the trackmaker is an ornithopod rather than a theropod on the basis of the length/width ratio, the anterior triangle length-width ratio, the short steps, the round to quadrangular heel pad impression and the probable manus impressions. Conclusions/Significance T. oncalensis shows similarities with various tracks from the Berriasian of Europe assigned to Iguanodontipus. The ichnotaxonomical status of this ichnospecies is here considered as Iguanodontipus? oncalensis due to the current state of knowledge of the ichnotaxonomy of medium-sized ornithopod tracks. This reassessment of I? oncalensis also has two significant implications for the palaeoecology of the faunas during the deposition of the Huérteles Formation: 1- the high number and percentage of theropod tracks would be lower than previous papers have suggested. 2- the gregarious behaviour described in the type locality (Fuentesalvo) would be among ornithopods instead of theropods.
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                Author and article information

                Journal
                Biological Journal of the Linnean Society
                Biol J Linn Soc Lond
                Wiley
                00244066
                November 2014
                November 2014
                October 18 2014
                : 113
                : 3
                : 721-736
                Affiliations
                [1 ]Dinosaur Trackers Research Group; University of Colorado at Denver; CB 172, PO Box 173364 Denver CO 80217-3364 USA
                [2 ]School of the Earth Sciences and Resources; China University of Geosciences; Beijing 100083 China
                [3 ]Ocean and Earth Science, National Oceanography Centre; University of Southampton; Southampton SO14 3ZH UK
                Article
                10.1111/bij.12294
                e64660e6-d44d-41f0-9119-4f836bca0e22
                © 2014

                http://doi.wiley.com/10.1002/tdm_license_1

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