Nearly half of the known species of mammals alive today (more than 1600) are rodents or "gnawing mammals" (Nowak and Paradiso, 1983). The diversity of rodents i

Provides the latest information in dating and correlation of the strata of late middle Eocene through early Oligocene age in North America.

This book places into modern context the information by which North American mammalian paleontologists recognize, divide, calibrate, and discuss intervals of ma

The order Rodentia is the most abundant and successful group of mammals, and it has been a focal point of attention for compar ative and evolutionary biologists