A multi-institutional team of archaeologists and paleontologists has unearthed and identified a new species of mammal from the Maastrichtian age. In their paper published in the journal Scientific Reports, the researchers note that the mammal was much larger than any other known examples of its kind.
To summarize the new animal size -
Patagomaia chainko is described as medium-sized by today’s standards, around the size of an Andean fox, and the species was estimated to weigh 2-25 kg (4-51 lbs).
It is one of the largest mammals from the Late Cretaceous period, around 70 million years ago. Most mammals during that time were under 100g(.22 lbs), with few reaching 1kg(2.21 lbs).