A revision of the putative Late Cretaceous triconodonts from South America

Austrotriconodon mckennai and Austrotriconodon sepulvedai, from the Campanian Los Alamitos Formation, Patagonia, Argentina were originally described as triconodont mammals and the sole members of the family Austrotriconodontidae. These mammals were represented by isolated cheek teeth originally rega...

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Autores principales:	Gaetano, Leandro Carlos, Marsicano, Claudia Alicia, Rougier, Guillermo Walter
Publicado:	2013
Materias:	Late Cretaceous Los Alamitos Formation Meridiolestida South America Triconodonts Campanian Cretaceous dentition fossil record mammal morphology paleontology taxonomy Argentina Patagonia
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v46_n_p90_Gaetano http://hdl.handle.net/20.500.12110/paper_01956671_v46_n_p90_Gaetano
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01956671_v46_n_p90_Gaetano
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spelling	paper:paper_01956671_v46_n_p90_Gaetano2023-06-08T15:20:17Z A revision of the putative Late Cretaceous triconodonts from South America Gaetano, Leandro Carlos Marsicano, Claudia Alicia Rougier, Guillermo Walter Late Cretaceous Los Alamitos Formation Meridiolestida South America Triconodonts Campanian Cretaceous dentition fossil record mammal morphology paleontology taxonomy Argentina Patagonia Austrotriconodon mckennai and Austrotriconodon sepulvedai, from the Campanian Los Alamitos Formation, Patagonia, Argentina were originally described as triconodont mammals and the sole members of the family Austrotriconodontidae. These mammals were represented by isolated cheek teeth originally regarded as molariforms, but their peculiar morphology later raised doubts about their purported triconodont affinities. Nevertheless, the morphological bases supporting the alternative taxonomic views have not been fully documented. We present here detailed comparisons of Austrotriconodon with other Late Cretaceous taxa and conclude that Austrotriconodon specimens should be assigned to Meridiolestida and Mesungulatoidea. These isolated teeth are likely premolars and might represent unknown dental positions of already described species or correspond to taxa that are yet to be formally recognized. According to our interpretation, there is still no record of Cretaceous triconodonts in South America, but we support the triconodont affinities for Jurassic taxa from the Cañadón Asfalto Formation in central Patagonia. © 2013 Elsevier Ltd. Fil:Gaetano, L.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marsicano, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rougier, G.W. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v46_n_p90_Gaetano http://hdl.handle.net/20.500.12110/paper_01956671_v46_n_p90_Gaetano
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Late Cretaceous Los Alamitos Formation Meridiolestida South America Triconodonts Campanian Cretaceous dentition fossil record mammal morphology paleontology taxonomy Argentina Patagonia
spellingShingle	Late Cretaceous Los Alamitos Formation Meridiolestida South America Triconodonts Campanian Cretaceous dentition fossil record mammal morphology paleontology taxonomy Argentina Patagonia Gaetano, Leandro Carlos Marsicano, Claudia Alicia Rougier, Guillermo Walter A revision of the putative Late Cretaceous triconodonts from South America
topic_facet	Late Cretaceous Los Alamitos Formation Meridiolestida South America Triconodonts Campanian Cretaceous dentition fossil record mammal morphology paleontology taxonomy Argentina Patagonia
description	Austrotriconodon mckennai and Austrotriconodon sepulvedai, from the Campanian Los Alamitos Formation, Patagonia, Argentina were originally described as triconodont mammals and the sole members of the family Austrotriconodontidae. These mammals were represented by isolated cheek teeth originally regarded as molariforms, but their peculiar morphology later raised doubts about their purported triconodont affinities. Nevertheless, the morphological bases supporting the alternative taxonomic views have not been fully documented. We present here detailed comparisons of Austrotriconodon with other Late Cretaceous taxa and conclude that Austrotriconodon specimens should be assigned to Meridiolestida and Mesungulatoidea. These isolated teeth are likely premolars and might represent unknown dental positions of already described species or correspond to taxa that are yet to be formally recognized. According to our interpretation, there is still no record of Cretaceous triconodonts in South America, but we support the triconodont affinities for Jurassic taxa from the Cañadón Asfalto Formation in central Patagonia. © 2013 Elsevier Ltd.
author	Gaetano, Leandro Carlos Marsicano, Claudia Alicia Rougier, Guillermo Walter
author_facet	Gaetano, Leandro Carlos Marsicano, Claudia Alicia Rougier, Guillermo Walter
author_sort	Gaetano, Leandro Carlos
title	A revision of the putative Late Cretaceous triconodonts from South America
title_short	A revision of the putative Late Cretaceous triconodonts from South America
title_full	A revision of the putative Late Cretaceous triconodonts from South America
title_fullStr	A revision of the putative Late Cretaceous triconodonts from South America
title_full_unstemmed	A revision of the putative Late Cretaceous triconodonts from South America
title_sort	revision of the putative late cretaceous triconodonts from south america
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v46_n_p90_Gaetano http://hdl.handle.net/20.500.12110/paper_01956671_v46_n_p90_Gaetano
work_keys_str_mv	AT gaetanoleandrocarlos arevisionoftheputativelatecretaceoustriconodontsfromsouthamerica AT marsicanoclaudiaalicia arevisionoftheputativelatecretaceoustriconodontsfromsouthamerica AT rougierguillermowalter arevisionoftheputativelatecretaceoustriconodontsfromsouthamerica AT gaetanoleandrocarlos revisionoftheputativelatecretaceoustriconodontsfromsouthamerica AT marsicanoclaudiaalicia revisionoftheputativelatecretaceoustriconodontsfromsouthamerica AT rougierguillermowalter revisionoftheputativelatecretaceoustriconodontsfromsouthamerica
_version_	1768544473561694208

A revision of the putative Late Cretaceous triconodonts from South America

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