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Estudios Geologicos
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Estudios Geologicos
Article . 1997
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Un primitivo Notonychopidae (Litopterna) del Paleoceno inferior de Punta Peligro, Chubut, Argentina

A البدائية الباليوسينية السفلى Notonychopidae (Litopterna) من Punta Peligro، Chubut، الأرجنتين
Authors: José F. Bonaparte; Jorge Morales;

Un primitivo Notonychopidae (Litopterna) del Paleoceno inferior de Punta Peligro, Chubut, Argentina

Abstract

Se comunica un nuevo ungulado con dentición pre-selenodonta del Paleoceno inferior, Peligrense, de Patagonia, Argentina. Su morfología dentaria es muy similar a la de Notonychops powelli Soria, 1989, pero con caracteres más primitivos. La morfología de las cúspides, el tipo de desgaste y los caracteres crescentiformes del M3 indican que Requisia vidmari gen. nov., sp. nov. presenta fuertes evidencias del desarrollo de caracteres selenodontos, por lo que se lo considera como el más primitivo representante del orden Litopterna. Requisia vidmari y probablemente Wainka tshotshe Simpson, 1948, son primitivos en relación a Notonychops, pero su similitud morfológica justificaría su inclusión en la misma familia Notonychopidae. Se considera que la radiación adaptativa de los ungulados paleocenos de América del Sur fue precoz, eventualmente rápida, lo que dificulta encontrar un modelo filogenético suficientemente explicativo.

Keywords

Ecology and Behavior of Bats, Wildlife Ecology and Conservation Biology, paleoceno inferior, punta peligro, Argentina, notonychopidae, Agricultural and Biological Sciences, Notonychopidae, argentina, Ecology, Evolution, Behavior and Systematics, QE1-996.5, Litopterna, Ecology, Paleoceno inferior, Paleontology, Life Sciences, Geology, Lower Paleocene, Evolutionary Dynamics of Mammals and Their Ancestors, Computer science, Punta Peligro, litopterna, Earth and Planetary Sciences, FOS: Biological sciences, Physical Sciences, Environmental Science, Argentine, Paleobiology

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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