Macrocranion is a genus of extinct mammal from the Eocene epoch of Europe and North America. Exceptional fossils have been found in the Messel pit in Germany. Macrocranion species are often described as forest-floor predators, about the size of small squirrels but with longer limbs.
This picture shows an M. tupaiodon fossil, approximately 15 cm (6 in) in length, excavated at the Messel pit and on display in the State Museum of Natural History Karlsruhe.Photograph credit: H. Zell