Appendicular skeletons of isotemnid notoungulates are described from Cañadón Vaca
(Vacan “subage”, Casamayoran South American Land Mammal “Age”,? middle to late …

ERNEST L. LUNDELIUS JR.,*, 1 VAUGHN M. BRYANT, 2 ROLFE MANDEL, 3 KENNETH J.
THIES, 4 and ALSTON THOMS2; 1Jackson School of Geosciences, University of Texas at …

The phylogeny of Eucynodontia is an important topic in vertebrate paleontology and is the
foundation for understanding the origin of mammals. However, consensus on the phylogeny …

We describe a new genus, including at least two species, of apheliscine “condylarth,”
Gingerichia geoteretes from Douglass and Glennie quarries in the eastern Crazy Mountains …

The oldest known mesotheriids are referred to the genus Trachytherus, a taxon traditionally
included in its own subfamily 'Trachytheriinae'. The ontogeny, morphological variation and …

Since 2006, new field studies at the late Oligocene site of Quebrada Fiera (Mendoza,
Argentina) have increased the previous faunal record from these levels that are presently …

The rich Deseadan fauna from the locality of Salla Luribay (Bolivia) documents the last
occurrence of archaeohyracids, a poorly known group of small typotherian notoungulates …

Mammalia is defined by its ancestry as the taxon originating with the most recent common
ancestor of extant Monotremata and Theria. To diagnose Mammalia as so defined, 176 …

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

This study describes new remains of Hegetotheriidae (Notoungulata), including a new
species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province …