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Abstract:

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.

Registro:

Documento: Artículo
Título:A revision of the putative Late Cretaceous triconodonts from South America
Autor:Gaetano, L.C.; Marsicano, C.A.; Rougier, G.W.
Filiación:Instituto de Estudios Andinos Don Pablo Groeber (UBA - CONICET), Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldes 2160, Ciudad Univ., Pabellon II, C1428EGA Ciudad Autónoma de Buenos Aires, Argentina
Department of Anatomical Sciences and Neurobiology, University of Louisville, 500 S. Preston St., Louisville, KY 40292, United States
Palabras clave:Late Cretaceous; Los Alamitos Formation; Meridiolestida; South America; Triconodonts; Campanian; Cretaceous; dentition; fossil record; mammal; morphology; paleontology; taxonomy; Argentina; Patagonia
Año:2013
Volumen:46
Página de inicio:90
Página de fin:100
DOI: http://dx.doi.org/10.1016/j.cretres.2013.09.007
Título revista:Cretaceous Research
Título revista abreviado:Cretaceous Res.
ISSN:01956671
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v46_n_p90_Gaetano

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Citas:

---------- APA ----------
Gaetano, L.C., Marsicano, C.A. & Rougier, G.W. (2013) . A revision of the putative Late Cretaceous triconodonts from South America. Cretaceous Research, 46, 90-100.
http://dx.doi.org/10.1016/j.cretres.2013.09.007
---------- CHICAGO ----------
Gaetano, L.C., Marsicano, C.A., Rougier, G.W. "A revision of the putative Late Cretaceous triconodonts from South America" . Cretaceous Research 46 (2013) : 90-100.
http://dx.doi.org/10.1016/j.cretres.2013.09.007
---------- MLA ----------
Gaetano, L.C., Marsicano, C.A., Rougier, G.W. "A revision of the putative Late Cretaceous triconodonts from South America" . Cretaceous Research, vol. 46, 2013, pp. 90-100.
http://dx.doi.org/10.1016/j.cretres.2013.09.007
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Gaetano, L.C., Marsicano, C.A., Rougier, G.W. A revision of the putative Late Cretaceous triconodonts from South America. Cretaceous Res. 2013;46:90-100.
http://dx.doi.org/10.1016/j.cretres.2013.09.007