Data from: On the existence of non-microbiotherian Australidelphian marsupials (Diprotodontia) in the Eocene of Patagonia ...

A diverse assemblage of extinct mammals of early–middle Eocene age (Ypresian–Lutetian boundary) come from the Patagonian localities of La Barda and Laguna Fría around Paso del Sapo in northwestern Chubut Province (Argentina). Metatherians are well represented, mostly by dental remains of ‘Didelphimo...

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Bibliographic Details
Main Authors: Lorente, Malena, Chornogubsky, Laura, Goin, Francisco J.
Format: Dataset
Language:English
Published: Dryad 2017
Subjects:
Paleogene
Australdelphia
Diprotodontia
Paso del Sapo Fauna
Polydolopimorphia
tarsal bones
Metatheria
Argentina
Beck
Chubut
Patagonia
Antarc*
Antarctica
Online Access:https://dx.doi.org/10.5061/dryad.k3h00
https://datadryad.org/stash/dataset/doi:10.5061/dryad.k3h00
Description
Summary:A diverse assemblage of extinct mammals of early–middle Eocene age (Ypresian–Lutetian boundary) come from the Patagonian localities of La Barda and Laguna Fría around Paso del Sapo in northwestern Chubut Province (Argentina). Metatherians are well represented, mostly by dental remains of ‘Didelphimorphia’, Paucituberculata, Sparassodonta, Microbiotheria, and Polydolopimorphia. Here we analyse three calcanea and one astragalus referable to the same, indeterminate taxon, from La Barda, showing the fusion of their ectal and sustentacular facets. This facet arrangement characterizes the Australidelphia, a marsupial clade represented by Microbiotheria from South America and Antarctica, plus all Australasian lineages. Other australidelphian features shown by these tarsals include: in the calcanea, a reduced peroneal process and a tripartite cuboid facet; in the astragalus, a round, very small astragalar head in relation to the body; a convex trochlea with a half for the tibia and half, in slightly lower position, ... : Lorente, Chornogubsky, Goin - Australidelphian tarsals from PatagoniaData matrix modified from Beck (2012).Lorente, Chornogubsky, Goin - Palaeontology.nexSynapomorphiesList of synapomorphies for "New tarsal remains suggest the existence of non microbiotherian Australidelphian marsupials (Diprotodontia) in the Eocene of Patagonia" ...

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