Actually, the largest and heaviest wolves may be found in cold northern areas of America and Asia, including Canada and Alaska and the Russian steppes. Normally, these wolves do not exceed 80 kg (176 lb), when they do it is because we are talking about huge wolves, strong, sturdy and large and possibly have been bred in captivity. However, the size of these big wolves is nothing to what I could weigh the Epicyon. A prehistoric wolf stood at 170 (360 lb)kg.
Their name, Epicyon, means literally "more than a dog". And it really is bigger than a dog, from snout to tail could exceed 2.5 meters (9 ft.)(which dog measure that?). In addition, the Epicyon was part of the subfamily of Borophaginae, a group of ancient canids whose name means "bone crushing dogs", in reference to its strong and resistant teeth can crush the bones of its prey. Something like the teeth of hyenas ... when they had not yet appeared on earth. To get an idea, it has been observed that a wolf has a bite pressure of 270 kg (590 lb) as much as Epicyon morphology, this was over 600 kg (1322 lb)... we just got to the 80 (176 lb) kg of pressure.
It is thought that these prehistoric animals lived and hunted in packs ... thus achieving a great success in their survival. Stalked and hunted with its teeth large and small prey such as (antique mammoths, deer and the Synthetoceras or calicotéridos). The success of their survival was such that the Epicyon lived thousands of years, millions of years. Exactly 15 million years is one of the top predators. Virtually the entire Miocene Epicyon lived as it appeared 25 million years ago and disappeared for 5 ..... an eternity compared to the survival of the species homo sapiens.