First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina

We report here the first amphilestid triconodont from the Jurassic of South America. The specimen, a single isolated molariform, was found at the Queso Rallado locality from where a growing mammalian fauna is known (including a triconodontid, two australosphenidans, and an as yet undescribed allothe...

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Autores principales: Gaetano, L.C., Rougier, G.W.
Formato: JOUR
Materias:
Amphilestid
Jurassic
South America
Triconodont
Allotheria
Amphilestidae
Mammalia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10647554_v19_n4_p235_Gaetano
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_10647554_v19_n4_p235_Gaetano
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spelling todo:paper_10647554_v19_n4_p235_Gaetano2023-10-03T16:02:00Z First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina Gaetano, L.C. Rougier, G.W. Amphilestid Jurassic South America Triconodont Allotheria Amphilestidae Mammalia We report here the first amphilestid triconodont from the Jurassic of South America. The specimen, a single isolated molariform, was found at the Queso Rallado locality from where a growing mammalian fauna is known (including a triconodontid, two australosphenidans, and an as yet undescribed allotherian). The specimen, interpreted as a left lower tooth, presents five mesiodistally aligned, fairly symmetrical cusps, and is recognized as the type of a new taxon, Condorodon spanios. The phylogenetic analysis recovers Condorodon as a member of the clade Amphilestheria, closely related to Tendagurodon janenschi, an amphilestid triconodont from the Late Jurassic of Tanzania. Condorodon spanios is only distantly related to Argentoconodon fariasorum, the other triconodont known from Queso Rallado quarry. The phylogenetic position of Condorodon spanios points to the origin and diversification of amphilestherians during the Early Jurassic in a paleogeographical setting that allowed wide dispersion of these forms and argues, at least from the mammalian evidence, against a highly provincialized Pangaea. Some differences are however established between the filial western/eastern Gondwanan masses and their respective faunas. © 2012 Springer Science+Business Media, LLC. Fil:Gaetano, L.C. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10647554_v19_n4_p235_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 Amphilestid
Jurassic
South America
Triconodont
Allotheria
Amphilestidae
Mammalia
spellingShingle Amphilestid
Jurassic
South America
Triconodont
Allotheria
Amphilestidae
Mammalia
Gaetano, L.C.
Rougier, G.W.
First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina
topic_facet Amphilestid
Jurassic
South America
Triconodont
Allotheria
Amphilestidae
Mammalia
description We report here the first amphilestid triconodont from the Jurassic of South America. The specimen, a single isolated molariform, was found at the Queso Rallado locality from where a growing mammalian fauna is known (including a triconodontid, two australosphenidans, and an as yet undescribed allotherian). The specimen, interpreted as a left lower tooth, presents five mesiodistally aligned, fairly symmetrical cusps, and is recognized as the type of a new taxon, Condorodon spanios. The phylogenetic analysis recovers Condorodon as a member of the clade Amphilestheria, closely related to Tendagurodon janenschi, an amphilestid triconodont from the Late Jurassic of Tanzania. Condorodon spanios is only distantly related to Argentoconodon fariasorum, the other triconodont known from Queso Rallado quarry. The phylogenetic position of Condorodon spanios points to the origin and diversification of amphilestherians during the Early Jurassic in a paleogeographical setting that allowed wide dispersion of these forms and argues, at least from the mammalian evidence, against a highly provincialized Pangaea. Some differences are however established between the filial western/eastern Gondwanan masses and their respective faunas. © 2012 Springer Science+Business Media, LLC.
format JOUR
author Gaetano, L.C.
Rougier, G.W.
author_facet Gaetano, L.C.
Rougier, G.W.
author_sort Gaetano, L.C.
title First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina
title_short First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina
title_full First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina
title_fullStr First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina
title_full_unstemmed First Amphilestid from South America: A Molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina
title_sort first amphilestid from south america: a molariform from the jurassic cañadón asfalto formation, patagonia, argentina
url http://hdl.handle.net/20.500.12110/paper_10647554_v19_n4_p235_Gaetano
work_keys_str_mv AT gaetanolc firstamphilestidfromsouthamericaamolariformfromthejurassiccanadonasfaltoformationpatagoniaargentina
AT rougiergw firstamphilestidfromsouthamericaamolariformfromthejurassiccanadonasfaltoformationpatagoniaargentina
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