Australia's oldest marsupial fossils and their biogeographical implications.

<h4>Background</h4>We describe new cranial and post-cranial marsupial fossils from the early Eocene Tingamarra Local Fauna in Australia and refer them to Djarthia murgonensis, which was previously known only from fragmentary dental remains.<h4>Methodology/principal findings</h4&...

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Autores principales:	Robin M D Beck, Henk Godthelp, Vera Weisbecker, Michael Archer, Suzanne J Hand
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d509feee0f0f47dfa99a2a19b7b10e1c
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spelling	oai:doaj.org-article:d509feee0f0f47dfa99a2a19b7b10e1c2021-11-25T06:12:59ZAustralia's oldest marsupial fossils and their biogeographical implications.1932-620310.1371/journal.pone.0001858https://doaj.org/article/d509feee0f0f47dfa99a2a19b7b10e1c2008-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18365013/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>We describe new cranial and post-cranial marsupial fossils from the early Eocene Tingamarra Local Fauna in Australia and refer them to Djarthia murgonensis, which was previously known only from fragmentary dental remains.<h4>Methodology/principal findings</h4>The new material indicates that Djarthia is a member of Australidelphia, a pan-Gondwanan clade comprising all extant Australian marsupials together with the South American microbiotheres. Djarthia is therefore the oldest known crown-group marsupial anywhere in the world that is represented by dental, cranial and post-cranial remains, and the oldest known Australian marsupial by 30 million years. It is also the most plesiomorphic known australidelphian, and phylogenetic analyses place it outside all other Australian marsupials.<h4>Conclusions/significance</h4>As the most plesiomorphic and oldest unequivocal australidelphian, Djarthia may approximate the ancestral morphotype of the Australian marsupial radiation and suggests that the South American microbiotheres may be the result of back-dispersal from eastern Gondwana, which is the reverse of prevailing hypotheses.Robin M D BeckHenk GodthelpVera WeisbeckerMichael ArcherSuzanne J HandPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 3, p e1858 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Robin M D Beck Henk Godthelp Vera Weisbecker Michael Archer Suzanne J Hand Australia's oldest marsupial fossils and their biogeographical implications.
description	<h4>Background</h4>We describe new cranial and post-cranial marsupial fossils from the early Eocene Tingamarra Local Fauna in Australia and refer them to Djarthia murgonensis, which was previously known only from fragmentary dental remains.<h4>Methodology/principal findings</h4>The new material indicates that Djarthia is a member of Australidelphia, a pan-Gondwanan clade comprising all extant Australian marsupials together with the South American microbiotheres. Djarthia is therefore the oldest known crown-group marsupial anywhere in the world that is represented by dental, cranial and post-cranial remains, and the oldest known Australian marsupial by 30 million years. It is also the most plesiomorphic known australidelphian, and phylogenetic analyses place it outside all other Australian marsupials.<h4>Conclusions/significance</h4>As the most plesiomorphic and oldest unequivocal australidelphian, Djarthia may approximate the ancestral morphotype of the Australian marsupial radiation and suggests that the South American microbiotheres may be the result of back-dispersal from eastern Gondwana, which is the reverse of prevailing hypotheses.
format	article
author	Robin M D Beck Henk Godthelp Vera Weisbecker Michael Archer Suzanne J Hand
author_facet	Robin M D Beck Henk Godthelp Vera Weisbecker Michael Archer Suzanne J Hand
author_sort	Robin M D Beck
title	Australia's oldest marsupial fossils and their biogeographical implications.
title_short	Australia's oldest marsupial fossils and their biogeographical implications.
title_full	Australia's oldest marsupial fossils and their biogeographical implications.
title_fullStr	Australia's oldest marsupial fossils and their biogeographical implications.
title_full_unstemmed	Australia's oldest marsupial fossils and their biogeographical implications.
title_sort	australia's oldest marsupial fossils and their biogeographical implications.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/d509feee0f0f47dfa99a2a19b7b10e1c
work_keys_str_mv	AT robinmdbeck australiasoldestmarsupialfossilsandtheirbiogeographicalimplications AT henkgodthelp australiasoldestmarsupialfossilsandtheirbiogeographicalimplications AT veraweisbecker australiasoldestmarsupialfossilsandtheirbiogeographicalimplications AT michaelarcher australiasoldestmarsupialfossilsandtheirbiogeographicalimplications AT suzannejhand australiasoldestmarsupialfossilsandtheirbiogeographicalimplications
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Australia's oldest marsupial fossils and their biogeographical implications.

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