A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage

The genus Reigechimys (Rodentia, Echimyidae) was originally described on the basis of two mandibular fragments recovered from Huayquerian (late Miocene) outcrops of the Cerro Azul Formation in La Pampa Province (Argentina). The included species (R. plesiodon Verzi et al. and R octodontifirmis Verzi...

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Autores principales:	Sostillo, R., Montalvo, C.I., Verzp, D.H.
Formato:	JOUR
Materias:	Argentina Echimyidae Late miocene Reigechimys Rodentia biochronology evolutionary biology Miocene new species outcrop rodent species diversity Cerro Azul Ecuador Galapagos Islands Isabela [Galapagos Islands]
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00027014_v51_n4_p284_Sostillo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00027014_v51_n4_p284_Sostillo
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spelling	todo:paper_00027014_v51_n4_p284_Sostillo2023-10-03T13:53:16Z A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage Sostillo, R. Montalvo, C.I. Verzp, D.H. Argentina Echimyidae Late miocene Reigechimys Rodentia biochronology evolutionary biology Miocene new species outcrop rodent species diversity Argentina Cerro Azul Ecuador Galapagos Islands Isabela [Galapagos Islands] Echimyidae Rodentia The genus Reigechimys (Rodentia, Echimyidae) was originally described on the basis of two mandibular fragments recovered from Huayquerian (late Miocene) outcrops of the Cerro Azul Formation in La Pampa Province (Argentina). The included species (R. plesiodon Verzi et al. and R octodontifirmis Verzi et al.) represent a peculiar lineage characterized by its molar morphology with occlusal simplification that is extreme for the family. New materials recently found at the Cerro Azul Formation allow for a more detailed knowledge of the variation of Reigechimys and recognition of a new species, Reigechimys simplex sp. nov. characterized by the absence of mesoflexid/fossettid in the m1-2. The morphological changes of Reigechimys are described in the context of the turnover exhibited by octodontoid rodents in the Huayquerian of the Cerro Azul Formation. The polarity of changes described for Reigechimys is consistent with those of the other lineages. This evolutionary pattern enhances the biochronological interpretation of the Huayquerian in this formation. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v51_n4_p284_Sostillo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina Echimyidae Late miocene Reigechimys Rodentia biochronology evolutionary biology Miocene new species outcrop rodent species diversity Argentina Cerro Azul Ecuador Galapagos Islands Isabela [Galapagos Islands] Echimyidae Rodentia
spellingShingle	Argentina Echimyidae Late miocene Reigechimys Rodentia biochronology evolutionary biology Miocene new species outcrop rodent species diversity Argentina Cerro Azul Ecuador Galapagos Islands Isabela [Galapagos Islands] Echimyidae Rodentia Sostillo, R. Montalvo, C.I. Verzp, D.H. A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
topic_facet	Argentina Echimyidae Late miocene Reigechimys Rodentia biochronology evolutionary biology Miocene new species outcrop rodent species diversity Argentina Cerro Azul Ecuador Galapagos Islands Isabela [Galapagos Islands] Echimyidae Rodentia
description	The genus Reigechimys (Rodentia, Echimyidae) was originally described on the basis of two mandibular fragments recovered from Huayquerian (late Miocene) outcrops of the Cerro Azul Formation in La Pampa Province (Argentina). The included species (R. plesiodon Verzi et al. and R octodontifirmis Verzi et al.) represent a peculiar lineage characterized by its molar morphology with occlusal simplification that is extreme for the family. New materials recently found at the Cerro Azul Formation allow for a more detailed knowledge of the variation of Reigechimys and recognition of a new species, Reigechimys simplex sp. nov. characterized by the absence of mesoflexid/fossettid in the m1-2. The morphological changes of Reigechimys are described in the context of the turnover exhibited by octodontoid rodents in the Huayquerian of the Cerro Azul Formation. The polarity of changes described for Reigechimys is consistent with those of the other lineages. This evolutionary pattern enhances the biochronological interpretation of the Huayquerian in this formation.
format	JOUR
author	Sostillo, R. Montalvo, C.I. Verzp, D.H.
author_facet	Sostillo, R. Montalvo, C.I. Verzp, D.H.
author_sort	Sostillo, R.
title	A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
title_short	A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
title_full	A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
title_fullStr	A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
title_full_unstemmed	A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
title_sort	new species of reigechimys (rodentia, echimyidae) from the late miocene of central argentina and the evolutionary pattern of the lineage
url	http://hdl.handle.net/20.500.12110/paper_00027014_v51_n4_p284_Sostillo
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A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage

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