London (CNN)A wombat-like creature, the size of a black bear and weighing 330 pounds, roamed the earth some 25 million years ago, scientists have discovered.
A team led by researchers from the University of Salford in the UK discovered the new family of marsupial after studying the partial skull and most of a skeleton that had been collected from Lake Pinpa, in northeastern South Australia, on an expedition during the 1970s.
Researchers named the animal "Mukupirna," meaning "big bones" in Dieri and Malyangapa, the indigenous languages spoken in the region of South Australia where the fossil was first discovered.
In a paper published in Scientific Reports on Thursday, researchers confirmed that the mammal belonged to a new family of marsupials -- mammals characterized by premature birth and the continued development of the newborn while latched to the nipples on the mother's lower belly.
From studying the creature's fossilized teeth, bones and cranium, experts concluded that the animal, which would have weighed up to 330 pounds, would have engaged in "scratch-digging" but was unlikely to have burrowed.
"It is surprisingly large, particularity for that time period," lead author Robin Beck, from the University of Salford, told CNN. "It was one of the largest animals in Australia at that time."
Beck said that while the creatures most closely resemble wombats, they were about five times the size.
Scientists studied how body size has evolved in vombatiforms -- the group that includes Mukupirna, wombats, koalas and their fossil relatives -- and found that body weights of 220 pounds or more evolved at least six times over the past 25 million years.
The largest known vombatifom, named "Diprotodon," weighed more than 2 tonnes and survived until approximately 50,000 years ago.