Topic
Chulpasia
About: Chulpasia is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 66 citations.
Papers
1 Jan 2009
TL;DR: Chulpasia jimthorselli nov sp, differs in upper molar morphology only in minor details from the Peruvian type species Chulpasia mattaueri and is almost identical in size.
Abstract: A new marsupial from the early Eocene Tingamarra Local Fauna of southeastern Queensland, Australia, is named and referred to Chulpasia Crochet and Sige, 1993, a genus otherwise known from early Tertiary deposits of Peru This taxon, Chulpasia jimthorselli nov sp, differs in upper molar morphology only in minor details from the Peruvian type species Chulpasia mattaueri and is almost identical in size New materials referable to the Tingamarra marsupial Thylacotinga bartholomaii Archer, Godthelp and Hand are also described Species of Chulpasia and Thylacotinga share many striking derived as well as plesiomorphic dental features that allow recognition of a new monophyletic subfamily, Chulpasiinae Its familial relationships are in doubt, but members of the subfamily could have provided the ancestral stock for Rosendolops and other early Tertiary South American polydolopimorphian marsupials This is the first evidence that a Gondwanan genus of therian land mammals spanned South America, Antarctica and Australia during the early Tertiary The very close similarity between the Peruvian and Australian fossils (and suggested short time span between their stratigraphic occurrences) provides further paleontological support for a trans-Antarctic land connection between South America and Australia extending well into the early Paleogene # 2009 Published by Elsevier Masson SAS
32 citations
TL;DR: Chulpasia jimthorselli nov. sp., differs in upper molar morphology only in minor details from the Peruvian type species Chulpasia mattaueri and is almost identical in size as mentioned in this paper.
TL;DR: The overall morphology of Apeirodon more closely resembles Glasbius (particularly G.twitchelli) than any other Cretaceous-Paleogene American metatherian, supporting the largely accepted hypothesis proposing a common origin for some North and South American meetatherian lineages.
Abstract: We describe here a new small bunodont metatherian from Priabonian deposits of the Geste Formation exposed in the Puna of Catamarca Province (Argentina). The material, an isolated right M2?, was recovered by
screen-washing techniques
and allows us to erect the new species Apeirodon sorianoi. The combination of diagnostic characters includes triangular occlusal pattern, bunoid, with an equally developed stylocone and cusp D, absence of cusp C, protoconal base wide, preparacrista and postmetacrista short, well-developed paracingulum, presence of double rank postvallum-prevallid shear, and presence of small paraconule and larger metaconule that is distolingually located. The overall morphology of Apeirodon more closely resembles Glasbius (particularly G.
) than any other Cretaceous-Paleogene American metatherian, supporting the largely accepted hypothesis proposing a common origin for some North and South American metatherian lineages. Apeirodon also resembles Reigia punae (another small metatherian recovered from the same stratigraphic levels), Chulpasia, Palangania, and specimens referred to Bobbschaefferia. Tentatively, we propose the inclusion of Apeirodon and Reigia as early divergent members of Polydolopimorphia based on the presence of bunodonty, enlarged stylocone and cusp D, and a distolingually-shifted metaconule. These features, incipiently developed in these late Eocene taxa, are emphasized in later representatives of the order. The presence of a generalized putative polydolopimorphian in Priabonian deposits of northwestern Argentina highlights the key temporal and spatial position of the region in the context of the evolution of Paleogene South American mammals.
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Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2009 | 2 |