Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality

Despite a global fossil record, Metatheria are now largely restricted to Australasia and South America. Most metatherian paleodiversity studies to date are limited to particular subclades, time intervals, and/or regions, and few consider uneven sampling. Here, we present a comprehensive new data set...

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Detalles Bibliográficos
Autores principales: Bennett, C. Verity, Upchurch, Paul, Goin, Francisco Javier, Goswami, Anjadi
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Metatheria
Mammalia
Cenozoic
World record
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/97603
https://ri.conicet.gov.ar/11336/94590
https://bit.ly/2FNE3zC
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-97603
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Metatheria
Mammalia
Cenozoic
World record
spellingShingle Ciencias Naturales
Metatheria
Mammalia
Cenozoic
World record
Bennett, C. Verity
Upchurch, Paul
Goin, Francisco Javier
Goswami, Anjadi
Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
topic_facet Ciencias Naturales
Metatheria
Mammalia
Cenozoic
World record
description Despite a global fossil record, Metatheria are now largely restricted to Australasia and South America. Most metatherian paleodiversity studies to date are limited to particular subclades, time intervals, and/or regions, and few consider uneven sampling. Here, we present a comprehensive new data set on metatherian fossil occurrences (Barremian to end Pliocene). These data are analyzed using standard rarefaction and shareholder quorum subsampling (including a new protocol for handling Lagerstätte-like localities). Global metatherian diversity was lowest during the Cretaceous, and increased sharply in the Paleocene, when the South American record begins. Global and South American diversity rose in the early Eocene then fell in the late Eocene, in contrast to the North American pattern. In the Oligocene, diversity declined in the Americas, but this was more than offset by Oligocene radiations in Australia. Diversity continued to decrease in Laurasia, with final representatives in North America (excluding the later entry of <i>Didelphis virginiana</i>) and Europe in the early Miocene, and Asia in the middle Miocene. Global metatherian diversity appears to have peaked in the early Miocene, especially in Australia. Following a trough in the late Miocene, the Pliocene saw another increase in global diversity. By this time, metatherian biogeographic distribution had essentially contracted to that of today. Comparison of the raw and sampling-corrected diversity estimates, coupled with evaluation of "coverage" and number of prolific sites, demonstrates that the metatherian fossil record is spatially and temporally extremely patchy. Therefore, assessments of macroevolutionary patterns based on the raw fossil record (as in most previous studies) are inadvisable.
format Articulo
Articulo
author Bennett, C. Verity
Upchurch, Paul
Goin, Francisco Javier
Goswami, Anjadi
author_facet Bennett, C. Verity
Upchurch, Paul
Goin, Francisco Javier
Goswami, Anjadi
author_sort Bennett, C. Verity
title Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
title_short Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
title_full Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
title_fullStr Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
title_full_unstemmed Deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
title_sort deep time diversity of metatherian mammals: implications for evolutionary history and fossil-record quality
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/97603
https://ri.conicet.gov.ar/11336/94590
https://bit.ly/2FNE3zC
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