New Small Bunodont Metatherian from the Late Eocene of the Argentinean Puna

@article{Babot2019NewSB,
  title={New Small Bunodont Metatherian from the Late Eocene of the Argentinean Puna},
  author={Mar{\'i}a Judith Babot and Guillermo W. Rougier and Daniel Alfredo Garcia-Lopez and Brian M Davis},
  journal={Journal of Mammalian Evolution},
  year={2019},
  pages={1-12}
}
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… 
2 Citations
Geologically Oldest Pediomyoidea (Mammalia, Marsupialiformes) from the Late Cretaceous of North America, with Implications for Taxonomy and Diet of Earliest Late Cretaceous Mammals
TLDR
The presence of dentally derived marsupialiforms in the Turonian suggests that ecological drivers credited with dietary specializations among later Cretaceous taxa, such as proliferation of angiosperms and pollinating insects, were at work earlier than previously thought.

References

SHOWING 1-10 OF 103 REFERENCES
New Metatherian Mammal from the Early Eocene of Antarctica
TLDR
Several features suggest the allocation of this specimen among basal polydolopimorphians (Prepidolopidae or, more probably, Glasbiidae), which could offer new insights on the origins and early diversification of Australidelphian marsupials in southern (and northern?) continents.
A new early Eocene polydolopimorphian (Mammalia, Marsupialia) from Patagonia
TLDR
The morphotype represented by Rosendolops primigenium sheds new light on the possible progressive modifications that enabled the establishment of the molar pattern in South American “pseudodiprotodont” marsupials.
Griphotherion peiranoi, gen. et sp. nov., A New Eocene Notoungulata (Mammalia, Meridiungulata) from Northwestern Argentina
TLDR
The results of the analyses performed indicate that G. peiranoi is closely related to Mesotheriaceae, Hegetotheriidae, and Archaeohyracidae, which represent the ‘rodent-like’ notoungulates that evolved during the Late Paleogene and the Neogene.
A Bizarre New Family of Marsupialia (Incertae sedis) from the Early Pliocene of Northeastern Australia: Implications for the Phylogeny of Bunodont Marsupials
TLDR
It is argued that no North American Late Cretaceous taxa can be convincingly referred to the order Polydolopimorphia and continue to be known only from the Cenozoic of Gondwana, with no fossil evidence that their initial divergences occurred in North America.
Earliest South American paucituberculatans and their significance in the understanding of 'pseudodiprotodont' marsupial radiations
TLDR
It is concluded that ‘pseudodiprotodont’ marsupials of the traditional literature (i.e. Polydolopimorphia + Paucituberculata) do not form a natural group.
Taxonomy, affinities, and paleobiology of the tiny metatherian mammal Minusculodelphis, from the early Eocene of South America
TLDR
It is argued that insectivory (soft insects) is the best-supported diet for both species of Minusculodelphis, and that the most probable microhabitat for them was the understorey or leaf litter of tropical, rain forested environments.
PREPIDOLOPIDAE, NUEVA FAMILIA DE MARSUPIALIA DIDELPHOIDEA DEL EOCENO SUDAMERICANO
TLDR
The principal eonclusions are that Prepidolops represents a new family (Prepidolopidae) of the Didelphoidea nec Polydolopoides, and this new family is considered to be a surviving taxon of the didelphoid group, and the "transitional" genus from the "polyprotodont" to the "diprotodent" marsupial types.
UNA NUEVA "COMADREJA" (MAMMALIA, MARSUPIALIA, ?POLYDOLOPIMORPHIA) DEL PALEOCENO DE PATAGONIA, ARGENTINA
TLDR
A phylogenetic hypothesis that considers microbiotheriids, Palangania, and Polydolopimorphia as a monophyletic group is given preliminary consideration and suggests Glasbiinae affinities.
NEW SPECIMEN OF DELTATHEROIDES CRETACICUS (METATHERIA, DELTATHEROIDA) FROM THE LATE CRETACEOUS OF MONGOLIA
TLDR
Comparisons with other deltatheroidans reveal that D. cretacicus is most similar to Deltatheridium pretrituberculare, known from Bayn Dzak, Ukhaa Tolgod, and the younger Barun Goyot Formation, while two isolated upper molars from the Albian–Aptian of Oklahoma and the Oldman Formation of Alberta support a North American occurrence for a clade generally held to be Asiatic.
A REASSESSMENT OF BUNODONT METATHERIANS FROM THE PALEOGENE OF ITABORAÍ (BRAZIL): SYSTEMATICS AND AGE OF THE ITABORAIAN SALMA
TLDR
Correlation with stratigraphic, sedimentary and magmatic data from some of the best studied margin basins in SE Brazil, together with the systematic reassessment of bunodont metatherians from Itaborai, suggest that the Itaboraian SALMA is latest Paleocene- early Eocene in age.
...
1
2
3
4
5
...