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Palynofacial approach across the Cretaceous - Paleogene boundary in Marambio (Seymour) Island, Antarctic PeninsulaEnfoque palinofacial a través del límite Cretácico - Paleógeno en la Isla Marambio (Seymour), Península Antártica
(Asociación Geológica Argentina, 2007-12)
El presente estudio analiza el comportamiento de la materia orgánica palinológica a través del límite Cretácico-Paleógeno de la Isla Marambio (Seymour). El límite estudiado se encuentra en la sección superior de la Formación ...
Large ferruginized palaeorhizospheres from a Paleogene lateritic profile of Uruguay
(Elsevier Science, 2011-10)
It is proposed herein that columns included in the unconformity between Mercedes (Upper Cretaceous) and Asencio (Lower Eocene) formations of Uruguay, forming "caves" known since the XIX century, are large ferruginized ...
Encrusting and Boring Barnacles Through the Cretaceous/Paleogene Boundary in Northern Patagonia (Argentina)Cirripedios incrustantes y perforantes a través del límite cretácico/paleógeno en Patagonia Norte (Argentina)
(Asociacion Paleontologica Argentina, 2017-02)
La información sobre cirripedios como componentes fósiles de las comunidades de substratos duros de latitudes medias en el Hemisferio Sur es escasa. Los cambios en estas comunidades durante episodios de extinción como el ...
New hadrosaurid (Dinosauria: Ornithopoda) fossils from the uppermost Cretaceous of central Patagonia and the influence of paleoenvironment on South American hadrosaur distribution
(Pergamon-Elsevier Science Ltd, 2021-10)
We describe and incorporate fragmentary new cranial and postcranial materials of hadrosaurid ornithopods into the non-avian dinosaur assemblage of the Upper Cretaceous (Coniacian–Maastrichtian) Lago Colhué Huapi Formation ...
A giant elasmosaurid (Sauropterygia; Plesiosauria) from Antarctica: New information on elasmosaurid body size diversity and aristonectine evolutionary scenarios
(Elsevier, 2019)
Aristonectines show a highly derived morphology among elasmosaurid plesiosaurs, including some
species with large body size. A new postcranial skeleton is described from the uppermost Maastrichtian
levels of the L opez ...
Vegaviidae, a new clade of southern diving birds that survived the K/T boundary
(Springer, 2017-10)
The fossil record of Late Cretaceous-Paleogene modern birds in the Southern Hemisphere includes the Maastrichtian Neogaeornis wetzeli from Chile, Polarornis gregorii and Vegavis iaai from Antarctica, and Australornis lovei ...
Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
(NLM (Medline), 2018-03-04)
Background and Aims: Early Palaeocene (Danian) plant fossils from Patagonia provide information on the recovery from the end-Cretaceous extinction and Cenozoic floristic change in South America. Actinomorphic flowers with ...
Early Cretaceous neobatrachian frog (Anura) from Brazil sheds light on the origin of modern anurans
(Pergamon-Elsevier Science Ltd, 2020-08)
The fossil record of anurans in South America is scarse, especially for Mesozoic-aged beds. The aim of the present paper is to describe a new neobatrachian anuran coming from the Early Cretaceous (Aptian) Crato Formation ...
The South American and Antarctic Peninsula fossil record of Salviniales (water ferns): Its implication for understanding their evolution and past distribution
(Elsevier Science, 2021-12)
We compiled the fossil record of the heterosporous water ferns (Salviniales) including macro- and microfossils from South America and the Antarctic Peninsula. Both extant families, Marsileaceae and Salviniaceae, are well ...
A giant elasmosaurid (Sauropterygia; Plesiosauria) from Antarctica: New information on elasmosaurid body size diversity and aristonectine evolutionary scenarios
(Academic Press Ltd - Elsevier Science Ltd, 2019-10)
Aristonectines show a highly derived morphology among elasmosaurid plesiosaurs, including some species with large body size. A new postcranial skeleton is described from the uppermost Maastrichtian levels of the López de ...