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      First dinosaur tracks from the Açu Formation, Potiguar Basin (mid-Cretaceous of Brazil)

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          Abstract

          Abstract We record a new ichnosite bearing dinosaur tracks from the mid-Cretaceous (Aptian? -Cenomanian) of Brazil. The Fazenda dos Pingos ichnosite is situated within a sandstone pavement of the Açu Formation (Açu 3 unit) from the Potiguar Basin in the State of Rio Grande do Norte. This is a small ichnofauna, with only a few individual isolated tracks. One specimen is unequivocally attributed to a large sauropod and another to an ornithopod. Two other specimens represent poorly preserved tracks assigned to sauropods. This is the first record of dinosaur tracks from the Potiguar Basin and from the Rio Grande do Norte State.

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          Defining the morphological quality of fossil footprints. Problems and principles of preservation in tetrapod ichnology with examples from the Palaeozoic to the present

          Lorenzo Marchetti, Matteo Belvedere, Sebastian Voigt … (2019)
          Article 0 comments Cited 53 times – based on 0 reviews     Review now
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            Titanosaurid trackways from the Upper Cretaceous of Bolivia: evidence for large manus, wide-gauge locomotion and gregarious behaviour

            Martin G. Lockley, Anne S. Schulp, Christian A. Meyer … (2002)
            Article 0 comments Cited 35 times – based on 0 reviews     Review now
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              Ichnotaxonomic Review of Large Ornithopod Dinosaur Tracks: Temporal and Geographic Implications

              Ignacio Díaz-Martínez, Xabier Pereda-Suberbiola, Félix Pérez-Lorente … (2015)
              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.
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                Author and article information

                Journal
                Journal ID (publisher-id): aabc
                Title: Anais da Academia Brasileira de Ciências
                Abbreviated Title: An. Acad. Bras. Ciênc.
                Publisher: Academia Brasileira de Ciências (Rio de Janeiro, RJ, Brazil )
                ISSN (Print): 0001-3765
                ISSN (Electronic): 1678-2690
                Publication date (Print and electronic): 2021
                Volume: 93
                Issue: suppl 2
                Electronic Location Identifier: e20210635
                Affiliations
                [3] Rio de Janeiro Rio de Janeiro orgnameUniversidade do Estado do Rio de Janeiro orgdiv1Departamento de Estratigrafia e Paleontologia Brazil
                [2] Natal Rio Grande do Norte orgnameUniversidade Federal do Rio Grande do Norte orgdiv1Museu Câmara Cascudo Brazil
                [1] Venezia VE orgnameInstituto Cavanis Italy
                Article
                Publisher ID: S0001-37652021000401218 Publisher ID: S0001-3765(21)09300001218
                DOI: 10.1590/0001-3765202120210635
                SO-VID: ccfaa53d-3a69-43c4-9845-6f836e253c99
                License:

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                Date received : 23 April 2021
                Date accepted : 30 July 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 37, Pages: 0
                Product

                SciELO Brazil

                Categories
                Subject: Paleontology

                ScienceOpen disciplines: Paleontology
                Keywords: Potiguar Basin,mid-Cretaceous,tracks,dinosaur,Açu Formation
                Data availability:
                ScienceOpen disciplines: Paleontology
                Keywords: Potiguar Basin, mid-Cretaceous, tracks, dinosaur, Açu Formation

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