Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina

Octodontid rodents allied to the living burrowing tuco-tucos (genus Ctenomys) experienced a moderate cladogenesis from the early Pliocene to the early Pleistocene, depicted by well-differentiated monospecific or paucispecific genera. This multigeneric and paucispecific radiation contrasts with the e...

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Guardado en:
Detalles Bibliográficos
Publicado: 1992
Materias:
burrowing
cladogenesis
Eucelophorus
Pleistocene
Pliocene
rodent
Argentina
Buenos Aires
Caviomorpha
Ctenomyidae
Ctenomys
Octodontidae
Rodentia
Zanclea
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v29_n4_p363_Reig
http://hdl.handle.net/20.500.12110/paper_00027014_v29_n4_p363_Reig
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00027014_v29_n4_p363_Reig
record_format dspace
spelling paper:paper_00027014_v29_n4_p363_Reig2023-06-08T14:21:54Z Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina burrowing cladogenesis Eucelophorus Pleistocene Pliocene rodent Argentina Buenos Aires Caviomorpha Ctenomyidae Ctenomys Octodontidae Rodentia Zanclea Octodontid rodents allied to the living burrowing tuco-tucos (genus Ctenomys) experienced a moderate cladogenesis from the early Pliocene to the early Pleistocene, depicted by well-differentiated monospecific or paucispecific genera. This multigeneric and paucispecific radiation contrasts with the explosive pattern of species differentiation within the limits of the genus Ctenomys which characterizes a second phase of ctenomyine radiation. A possible explanation of the particular pattern of the ctenomyine cladogenesis is that the different genera of the Pliocene-early Pleistocene radiation represent different alternative adaptations to excavation in burrowing rodents, whereas the differentiation of Ctenomys species may have been mainly due to stochastic processes of fixation of chromosomal rearrangement triggered by the dynamics of molecular changes once an optimal burrowing adaptation was attained. The taxonomy of the fossil forms is far from being well known, and a revision of the different Plio-Pleistocene genera is needed. The results are presented of studies on the available material of the genus Eucelophorus, which seems to represent a good example of tooth-burrowing. -from Authors 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v29_n4_p363_Reig http://hdl.handle.net/20.500.12110/paper_00027014_v29_n4_p363_Reig
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic burrowing
cladogenesis
Eucelophorus
Pleistocene
Pliocene
rodent
Argentina
Buenos Aires
Caviomorpha
Ctenomyidae
Ctenomys
Octodontidae
Rodentia
Zanclea
spellingShingle burrowing
cladogenesis
Eucelophorus
Pleistocene
Pliocene
rodent
Argentina
Buenos Aires
Caviomorpha
Ctenomyidae
Ctenomys
Octodontidae
Rodentia
Zanclea
Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina
topic_facet burrowing
cladogenesis
Eucelophorus
Pleistocene
Pliocene
rodent
Argentina
Buenos Aires
Caviomorpha
Ctenomyidae
Ctenomys
Octodontidae
Rodentia
Zanclea
description Octodontid rodents allied to the living burrowing tuco-tucos (genus Ctenomys) experienced a moderate cladogenesis from the early Pliocene to the early Pleistocene, depicted by well-differentiated monospecific or paucispecific genera. This multigeneric and paucispecific radiation contrasts with the explosive pattern of species differentiation within the limits of the genus Ctenomys which characterizes a second phase of ctenomyine radiation. A possible explanation of the particular pattern of the ctenomyine cladogenesis is that the different genera of the Pliocene-early Pleistocene radiation represent different alternative adaptations to excavation in burrowing rodents, whereas the differentiation of Ctenomys species may have been mainly due to stochastic processes of fixation of chromosomal rearrangement triggered by the dynamics of molecular changes once an optimal burrowing adaptation was attained. The taxonomy of the fossil forms is far from being well known, and a revision of the different Plio-Pleistocene genera is needed. The results are presented of studies on the available material of the genus Eucelophorus, which seems to represent a good example of tooth-burrowing. -from Authors
title Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina
title_short Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina
title_full Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina
title_fullStr Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina
title_full_unstemmed Fossil ctenomyine rodents of the genus Eucelophorus (Caviomorpha: Octodontidae) from the Pliocene and early Pleistocene of Argentina
title_sort fossil ctenomyine rodents of the genus eucelophorus (caviomorpha: octodontidae) from the pliocene and early pleistocene of argentina
publishDate 1992
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v29_n4_p363_Reig
http://hdl.handle.net/20.500.12110/paper_00027014_v29_n4_p363_Reig
_version_ 1768545442587475968

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