The deposits of the Chorrillo Formation (Maastrichtian) were accumulated during a
'continental window'that occurred during the Late Cretaceous in the Austral-Magallanes …

In the dusk of the Mesozoic, advanced duck-billed dinosaurs (Hadrosauridae) were so
successful that they likely outcompeted other herbivores, contributing to declines in dinosaur …

The Mesozoic plate tectonic and paleogeographic history of the final break up of West
Gondwana had a profound effect on the distribution of terrestrial vertebrates in South …

Frogs (Anura) are nowadays common and abundant constituents of terrestrial and
freshwater ecosystems near globally and their fossil record shows that they were already …

Theria represent an extant clade that comprises placental and marsupial mammals. Here we
report on the discovery of a new Late Cretaceous mammal from southern Patagonia …

Monotremata is a clade of egg-lying mammals, represented by the living platypus and
echidnas, which is endemic to Australia, and adjacent islands. Occurrence of basal …

The end Cretaceous mass extinction was marked by a dramatic change in biodiversity, and
the extinction of all non-avian dinosaurs. To understand the diversity of dinosaur clades prior …

Abstract The Upper Cretaceous (Cenomanian) Mata Amarilla Formation in western central
Santa Cruz province of Argentina has yielded fragmentary teeth of a large? docodontan, an …

Abstract The Cerro Fortaleza Formation is a stratigraphic unit that crops out near the Cerro
Fortaleza hill, northwestern Santa Cruz province, Argentina. This unit has been well-known …

Henkelotherium guimarotae Krebs 1991 is an important Jurassic mammal for understanding
therian evolution. We are presenting a new study of extensive, previously undescribed …