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New macrostomatan snake from the Paleogene of northwestern Argentina
(Elsevier France-editions Scientifiques Medicales Elsevier, 2018-06)
The lower Eocene Lumbrera Formation in Salta province, northwestern Argentina, outstands for providing snake remains from a non-Patagonian Paleogene site. The material consists of articulated precloacal vertebrae that ...
Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes
(Elsevier, 2013-04)
The Seymour Island fossil penguins from the Cross Valley and La Meseta Formations, Seymour Island (James Ross Basin; late Paleocene, and Eocene/?early Oligocene respectively) constitute the most complete stratigraphic ...
A review of the molar morphology and phylogenetic affinities of Sillustania quechuense (Metatheria, Polydolopimorphia, Sillustaniidae), from the early Paleogene of Laguna Umayo, southeastern Peru
(Society of Vertebrate Paleontology, 2015-09)
The early Paleogene mammalian assemblages known from the red mudstones of the Lower Muñani Formation at Laguna Umayo, southeastern Perú, add significant information on the early phases of the evolution of Metatheria in ...
Paleogene dinoflagellate cysts from the Punta Prat, Southern Chile
(Taylor & Francis, 2009-03)
Paleogene dinoflagellate cysts were recorded from the Chorrillo Chico and Agua Fresca formations at Punta Prat, southern Chile. Due to the presence of Palaeoperidinium pyrophorum, the Chorrillo Chico Formation is no younger ...
On the status of Isolophodon Roth, 1903 (Mammalia, Astrapotheria) and other little-known Paleogene astrapotheres from central Patagonia
(Elsevier Masson, 2013-04)
Most of the 16 currently recognized astrapothere genera are well known through numerous specimens preserving at least almost complete dentition. One of the exceptions is the enigmatic genus Isolophodon Roth, 1903, based ...
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection
(Elsevier Science, 2014-11)
The biogeographic hypothesis more accepted today is that Antarctica (West Antarctica) and southern South America (Magellan region, Patagonia) were connected by a long and narrow causeway (Weddellian Isthmus) between the ...
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America-Antarctica land connection
(Elsevier Science, 2014-12)
The biogeographic hypothesis more accepted today is that Antarctica (West Antarctica) and southern South America (Magellan region, Patagonia) were connected by a long and narrow causeway (Weddellian Isthmus) between the ...