Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic

The Los Colorados Formation constitutes a continuous continental succession deposited in Western Argentina during the Late Triassic, a time period that is crucial to the record of the faunistic turnover at the Triassic-Jurassic boundary. Many authors have pointed out that its rich tetrapod fauna rep...

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Autores principales: Arcucci, A.B., Marsicano, C.A., Caselli, A.T.
Formato: JOUR
Materias:
Archosaurs
Chirotheroid tracks
Los Colorados
Palaeoenvironment
Upper Triassic
Gondwana
paleoenvironment
tetrapod
Triassic
Alligator
Crocodylidae (all crocodiles)
Dinosauria
Protosuchia
Sauropodomorpha
Tetrapoda
Therapsida
Theropoda
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00166995_v37_n5_p557_Arcucci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00166995_v37_n5_p557_Arcucci
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spelling todo:paper_00166995_v37_n5_p557_Arcucci2023-10-03T14:14:33Z Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic Arcucci, A.B. Marsicano, C.A. Caselli, A.T. Archosaurs Chirotheroid tracks Los Colorados Palaeoenvironment Upper Triassic Gondwana paleoenvironment tetrapod Triassic Alligator Crocodylidae (all crocodiles) Dinosauria Protosuchia Sauropodomorpha Tetrapoda Therapsida Theropoda The Los Colorados Formation constitutes a continuous continental succession deposited in Western Argentina during the Late Triassic, a time period that is crucial to the record of the faunistic turnover at the Triassic-Jurassic boundary. Many authors have pointed out that its rich tetrapod fauna represents a unique transitional assemblage with elements typical of both Late Triassic and Early Jurassic. However, the possibility that the fauna represented a mixture of Triassic and Jurassic horizons was also proposed. Recently, stratigraphic control of the fossiliferous levels was developed in order to correlate the different localities of the extense Los Colorados outcrops, and a revision of the taxonomic status of most tetrapods recovered is currently undergoing. Preliminary results confirm previous assumptions about the transitional nature of the assemblage where typical Triassic taxa are associated with dinosaur groups known from Early Jurassic levels in other Gondwanan areas. The fossiliferous levels of the upper third of the sequence included several basal archosaurs (aetosaurs, rauisuchids, sphenosuchians), protosuchian crocodiles, dinosaurs (sauropodomorphs, tetanuran theropods), derived therapsids and primitive chelonians. New evidence about tetrapod ichnites of chirotheroid affinities is added to the fossiliferous association. © 2004 Elsevier SAS. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00166995_v37_n5_p557_Arcucci
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Archosaurs
Chirotheroid tracks
Los Colorados
Palaeoenvironment
Upper Triassic
Gondwana
paleoenvironment
tetrapod
Triassic
Alligator
Crocodylidae (all crocodiles)
Dinosauria
Protosuchia
Sauropodomorpha
Tetrapoda
Therapsida
Theropoda
spellingShingle Archosaurs
Chirotheroid tracks
Los Colorados
Palaeoenvironment
Upper Triassic
Gondwana
paleoenvironment
tetrapod
Triassic
Alligator
Crocodylidae (all crocodiles)
Dinosauria
Protosuchia
Sauropodomorpha
Tetrapoda
Therapsida
Theropoda
Arcucci, A.B.
Marsicano, C.A.
Caselli, A.T.
Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic
topic_facet Archosaurs
Chirotheroid tracks
Los Colorados
Palaeoenvironment
Upper Triassic
Gondwana
paleoenvironment
tetrapod
Triassic
Alligator
Crocodylidae (all crocodiles)
Dinosauria
Protosuchia
Sauropodomorpha
Tetrapoda
Therapsida
Theropoda
description The Los Colorados Formation constitutes a continuous continental succession deposited in Western Argentina during the Late Triassic, a time period that is crucial to the record of the faunistic turnover at the Triassic-Jurassic boundary. Many authors have pointed out that its rich tetrapod fauna represents a unique transitional assemblage with elements typical of both Late Triassic and Early Jurassic. However, the possibility that the fauna represented a mixture of Triassic and Jurassic horizons was also proposed. Recently, stratigraphic control of the fossiliferous levels was developed in order to correlate the different localities of the extense Los Colorados outcrops, and a revision of the taxonomic status of most tetrapods recovered is currently undergoing. Preliminary results confirm previous assumptions about the transitional nature of the assemblage where typical Triassic taxa are associated with dinosaur groups known from Early Jurassic levels in other Gondwanan areas. The fossiliferous levels of the upper third of the sequence included several basal archosaurs (aetosaurs, rauisuchids, sphenosuchians), protosuchian crocodiles, dinosaurs (sauropodomorphs, tetanuran theropods), derived therapsids and primitive chelonians. New evidence about tetrapod ichnites of chirotheroid affinities is added to the fossiliferous association. © 2004 Elsevier SAS. All rights reserved.
format JOUR
author Arcucci, A.B.
Marsicano, C.A.
Caselli, A.T.
author_facet Arcucci, A.B.
Marsicano, C.A.
Caselli, A.T.
author_sort Arcucci, A.B.
title Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic
title_short Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic
title_full Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic
title_fullStr Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic
title_full_unstemmed Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): A significant sample from Western Gondwana at the end of the Triassic
title_sort tetrapod association and palaeoenvironment of the los colorados formation (argentina): a significant sample from western gondwana at the end of the triassic
url http://hdl.handle.net/20.500.12110/paper_00166995_v37_n5_p557_Arcucci
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AT marsicanoca tetrapodassociationandpalaeoenvironmentoftheloscoloradosformationargentinaasignificantsamplefromwesterngondwanaattheendofthetriassic
AT caselliat tetrapodassociationandpalaeoenvironmentoftheloscoloradosformationargentinaasignificantsamplefromwesterngondwanaattheendofthetriassic
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