Following our traditional concept of Mammalia, and thus including a number of forms known
only by fossils of the Mesozoic, the earliest mammals are from the Late Triassic, a bit over …

The first fossil chordates are found in deposits from the Cambrian period (545–490 million
years ago), but their earliest record is exceptionally sporadic and is often controversial …

The current literature on marsupial phylogenetics includes numerous studies based on
analyses of morphological data with limited sampling of Recent and fossil taxa, and many …

We propose a phylogeny of all major groups of Mesozoic mammals based on phylogenetic
analyses of 46 taxa and 275 osteological and dental characters, using parsimony methods …

Monotremes have traditionally been considered a remnant group of mammals descended
from archaic Mesozoic stock, surviving to the present day on the relatively isolated …

Maelestes gobiensis, is the second new eutherian mammal to be named from the rich
Mongolian Late Cretaceous locality of Ukhaa Tolgod, Ukhaatherium nessovi, being the first …

A new symmetrodont mammal has been discovered in the Mesozoic era (Late Jurassic or
Early Cretaceous period) of Liaoning Province, China. Archaic therian mammals, including …

The Eucynodontia (Kemp, 1982, 1988), that is, those cynodonts more derived than the basal
Triassic Thrinaxodon, have tra-ditionally been divided into a carnivorous line leading to …

The evolution of tribosphenic molars is a key innovation in the history of Mammalia.
Tribospheny allows for both shearing and grinding occlusal functions. Marsupials and …

ABSTRACT The Section of Mammals, Carnegie Museum of Natural History houses 54
partial and complete skulls of the short-tailed opossum Monodelphis. Described in detail …