Muranthosarchus

Muranthosarchus was a species of Mesonychid native to Mongolia during the Eocene, about the same time as Andrewsarchus, one of the main rivals of Muranthosarchus, which was similar in size and build. They were the largest carnivorous land mammal on earth, being about the same size as its Andrewsarchus rivals. Their stomach content in some of the fossilized specimen confirmed that Muranthosarchus fed on carrion, no live animals as they're either too fast or too heavily-protected against the Muranthosarchus to hunt, making them a sort of a gigantic mammalian vultures. They were one of the last ever species of Mesonychids on earth, with most other Mesonychid species becoming extinct probably due to climate change or competition from newer mammal predators, so the Muranthosarchus had survived during this time by becoming almost completely a scavenger, to avoid most competition from predatory Andrewsarchus. The reason for the Muranthosarchus's extinction is unknown, but they were probably outcompeted to extinction by newer predators including Hyeanodonts, Entelodonts, bear-dogs, and some others.