Abstract The Cenozoic South American endemic pyrotheres, mostly characterized by a
bilophodont dentition, are one of the most mysterious ungulates ever known. Even though …

The phylogenetic relationships of endemic South American ungulates are a highly debated
topic. Among them, the most well-known clades are the Notoungulata and the Astrapotheria …

Baguatherium jaureguii gen. et sp. nov. from the early Oligocene of northern Peru is the best
known pre-Deseadan pyrothere. It has a relatively wider palate and less oblique lophs on …

The Notoungulata is the richest order of South American endemic placentals, but
phylogenetic relationships within this order are unclear. This work provides short …

At least seven groups of ungulates occurred in South America during the Tertiary: Litopterna,
Notoungulata, Astrapotheria, Xenungulata, Pyrotheria, Didolodontidae, and kollpaniine …

ABSTRACT In 1933 George G. Simpson described a remarkably complete skull of
Trigonostylops, an Eocene South American native ungulate (SANU) whose relationships …

Proticia venezuelensis ng and sp., based on a partial mandible from rocks attributed to the
Trujillo Formation, Paleocene to early Eocene, exposed on the southern flank of the Sierra …

We describe a new metatherian mammal, Fieratherium sorex gen. et sp. nov., found in
western Argentina (Quebrada Fiera locality, southern Mendoza Province), in Late Oligocene …

An almost complete skeleton of Phoberomys pattersoni is reported from the Urumaco
Formation in northwestern Venezuela. Phoberomys attained the largest body size among …

The Brontotheriidae is an extinct family of Eocene perissodactyls known from North America,
Asia, and, rarely, Eastern Europe. Brontotheres are widely recognized as having evolved …