The Ekaltadeta was a giant, meat-eating rat-kangaroo from Australia. This long-extinct marsupial (pouched mammal) lived from the late Oligocene (roughly 25 million years ago) until about 50 million years ago. Fossils have been found in northern Australia, at the Riversleigh site (in Queensland).

Anatomy: Ekaltadeta's lower front teeth were very long, forward-pointing, and dagger-like. They were probably used to kill prey. Only skulls have been found.

Diet: The Ekaltadeta ate meat and plants. Its diet probably included the fangaroo (a small plant-eating kangaroo with large, protective fangs).