This report summarizes a decade of morphological and molecular research on the
phylogenetic relationships of didelphid marsupials (opossums), a substantially intact …

Background Variation is a naturally occurring phenomenon that is observable at all levels of
morphology, from anatomical variations of DNA molecules to gross variations between …

The external and internal surfaces of the skull of the Hispaniolan solenodon, Solenodon
paradoxus, are described and illustrated in detail based on five museum specimens (one …

Background We describe new cranial and post-cranial marsupial fossils from the early
Eocene Tingamarra Local Fauna in Australia and refer them to Djarthia murgonensis, which …

The coiled cochlea is a key evolutionary innovation of modern therian mammals. We report
that the Late Jurassic mammal Dryolestes, a relative to modern therians, has derived bony …

The present paper describes a disarticulated skull of Allqokirus australis, a basal
sparassodont (Metatheria, Mammalia) from the early Palaeocene (c. 65 Ma.) of Tiupampa …

The skull of the polydolopimorphian marsupialiform Epidolops ameghinoi is described in
detail for the first time, based on a single well-preserved cranium and associated left and …

Although isolated mammalian petrosals often are encountered in the fossil record, few
detailed descriptions of these bones exist for extant taxa. As a contribution to that void …

The petrosal anatomy and inner ear structure of Jurassic cladotherian mammals represent
the ancestral morphological conditions (groundplan) from which modern therian mammals …

Knowledge of the latest Late Cretaceous mammalian fauna in the South America was, until
now, mostly based on dentally known taxa recovered at Los Alamitos (Río Negro …