High Quality Content by WIKIPEDIA articles Pachycrocuta was a genus of prehistoric hyenas. The largest and most well-researched species was the giant hyena Pachycrocuta brevirostris, which stood about 100 cm (39 in) at the shoulder and may have weighed 190 kg (420 lb) - the size of a lioness. This would make it the largest hyena to have ever lived. It lived between the Middle Pliocene and the Middle Pleistocene, about 3 million to 500,000 years ago...