Zaglossus hacketti is an extinct species of the long-beaked echidna from Western Australia that is dated from the Pleistocene. It is known only from a few bones found in Western Australia. It was the size of a sheep, weighing probably up to 100 kg lb).
The entolodont Archaeotherium scares away a pair of the primitive dog Hesperocyon from a watering hole. Oligocene of western North America. By Mauricio Anton from the book "National Geographic: Prehistoric Mammals"