The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino

Living capybaras are a unique group of rodents. They have ever-growing cheek teeth with a complicated occlusal morphology that changes even after birth. Concerning fossil capybaras this morphological change, associated with increasing size, led to regard them as taxonomically highly diverse, includi...

Descripción completa

Detalles Bibliográficos
Autores principales:	Vucetich, M.G., Deschamps, C.M., Pérez, M.E., Montalvo, C.I.
Formato:	JOUR
Materias:	Hydrochoeridae Pliocene Rodentia South America Taxonomy
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00027014_v51_n3_p173_Vucetich
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00027014_v51_n3_p173_Vucetich
record_format	dspace
spelling	todo:paper_00027014_v51_n3_p173_Vucetich2023-10-03T13:53:15Z The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino Vucetich, M.G. Deschamps, C.M. Pérez, M.E. Montalvo, C.I. Hydrochoeridae Pliocene Rodentia South America Taxonomy Living capybaras are a unique group of rodents. They have ever-growing cheek teeth with a complicated occlusal morphology that changes even after birth. Concerning fossil capybaras this morphological change, associated with increasing size, led to regard them as taxonomically highly diverse, including small species with simple dental morphology, and large species with complicated cheek teeth, considered as primitive and derived, respectively. Recently, it was proposed that the different morphs found in each locality actually represent individuals of different ontogenetic stages of a population or successive populations, rather than a multiplicity of coeval species in different stages of evolution. For the Pliocene, the richest locality for capybaras is Farola Monte Hermoso on the southern coast of Buenos Aires Province. This locality yielded four nominal species of capybaras, three of them are a small morph (Phugatherium cataclisticum Ameghino, "Anchimysops villalobosi" Kraglievich, "A. ultra" Kraglievich) and the other a large one (" Chapalmathcrium perturbidum (Ameghino)). In this paper we propose that they represent juveniles and adults of one species, P. cataclisticum. In order to evaluate the phylogenetic position of Phugatherium within Cavioidea a cladistic analysis was performed modifying a previously published combined matrix of morphology and DNA sequences. Phugathmum forms a monophyletic group and is the sister group of modern capybaras. Within Phugatherium the most basal species is P. novum Ameghino, whereas the type species P. cataclisticum is the sister group of P. saavedrai Hoffstetter, Villarroel and Rodrigo. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v51_n3_p173_Vucetich
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Hydrochoeridae Pliocene Rodentia South America Taxonomy
spellingShingle	Hydrochoeridae Pliocene Rodentia South America Taxonomy Vucetich, M.G. Deschamps, C.M. Pérez, M.E. Montalvo, C.I. The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino
topic_facet	Hydrochoeridae Pliocene Rodentia South America Taxonomy
description	Living capybaras are a unique group of rodents. They have ever-growing cheek teeth with a complicated occlusal morphology that changes even after birth. Concerning fossil capybaras this morphological change, associated with increasing size, led to regard them as taxonomically highly diverse, including small species with simple dental morphology, and large species with complicated cheek teeth, considered as primitive and derived, respectively. Recently, it was proposed that the different morphs found in each locality actually represent individuals of different ontogenetic stages of a population or successive populations, rather than a multiplicity of coeval species in different stages of evolution. For the Pliocene, the richest locality for capybaras is Farola Monte Hermoso on the southern coast of Buenos Aires Province. This locality yielded four nominal species of capybaras, three of them are a small morph (Phugatherium cataclisticum Ameghino, "Anchimysops villalobosi" Kraglievich, "A. ultra" Kraglievich) and the other a large one (" Chapalmathcrium perturbidum (Ameghino)). In this paper we propose that they represent juveniles and adults of one species, P. cataclisticum. In order to evaluate the phylogenetic position of Phugatherium within Cavioidea a cladistic analysis was performed modifying a previously published combined matrix of morphology and DNA sequences. Phugathmum forms a monophyletic group and is the sister group of modern capybaras. Within Phugatherium the most basal species is P. novum Ameghino, whereas the type species P. cataclisticum is the sister group of P. saavedrai Hoffstetter, Villarroel and Rodrigo.
format	JOUR
author	Vucetich, M.G. Deschamps, C.M. Pérez, M.E. Montalvo, C.I.
author_facet	Vucetich, M.G. Deschamps, C.M. Pérez, M.E. Montalvo, C.I.
author_sort	Vucetich, M.G.
title	The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino
title_short	The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino
title_full	The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino
title_fullStr	The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino
title_full_unstemmed	The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino
title_sort	taxonomic status of the pliocene capybaras (rodentia) phugatherium ameghino and chapalmatherium ameghino
url	http://hdl.handle.net/20.500.12110/paper_00027014_v51_n3_p173_Vucetich
work_keys_str_mv	AT vucetichmg thetaxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT deschampscm thetaxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT perezme thetaxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT montalvoci thetaxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT vucetichmg taxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT deschampscm taxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT perezme taxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino AT montalvoci taxonomicstatusofthepliocenecapybarasrodentiaphugatheriumameghinoandchapalmatheriumameghino
_version_	1807316398311997440

The taxonomic status of the Pliocene capybaras (Rodentia) Phugatherium Ameghino and Chapalmatherium Ameghino

Ejemplares similares