The Microsyopidae are extinct mammals from the late Paleocene–late Eocene of North
America and the late Paleocene of Europe. While results from phylogenetic analyses …

Objectives Innovations in brain structure and increase in brain size relative to body mass are
key features of Primates evolutionary history. Surprisingly, the endocranial morphology of …

The semicircular canals of the inner ear detect head rotations and trigger compensatory
movements that stabilize gaze and help maintain visual fixation. Mammals with large eyes …

In biology, there is currently a debate being waged about the basic principles of doing
taxonomy (eg, Benton, 2000; Cantino and De Queiroz, 2000; De Queiroz, 1994, 1997; De …

Microsyopidae is a family of plesiadapiforms known from over 1500 stratigraphically
controlled specimens from the southern Bighorn Basin of Wyoming spanning the first three …

The ear region of the pen-tailed treeshrew, Ptilocercus lowii Gray, 1848 (Scandentia,
Ptilocercidae), is described and illustrated in detail based on five museum specimens from …

Paleogene micromomyids are small (∼ 10–40 g) euarchontan mammals with primate-like
molars and postcrania suggestive of committed claw-climbing positional behaviors, similar …

Plesiadapidae are a family of Paleogene mammals thought to have phylogenetic affinities
with modern Primates. We describe previously unpublished dentitions and the first skull and …

History of study...................................................... Objectives...............................................................
Institutional abbreviations...................................... Generic abbreviations …

Plesiadapidae are a diverse monophyletic family of primate-like mammals that existed
during the Paleogene in Europe and North America. They are thought to be nested within …