Main Group: Placental Mammals (Pangolins)

Time: Middle Eocene

Size: 18 in (45 cm) long

Fossil Finds: United States

Metacheiromys (1)

Fossil skeleton

There has been great debate on what the closest living relatives of Metacheiromys were, it was once though to be close to armadillos or anteaters. It is now regarded as an extinct pangolin.