Epicyon ("more than a dog") is a large, extinct, canid genus of the subfamily Borophaginae ("bone-crushing dogs"), native to North America. Epicyon existed for about from the early Clarendonian age of the Late Miocene to the late Hemphillian age of the Early Pliocene.

Epicyon haydeni is a late-occuring borophagine dog that exemplifies one extreme end of the spectrum of borophagine diversity. The largest individuals of Epicyon haydeni were about the size of a grizzly bear, which makes this animal the largest canid ever known (Wang et al., 1999).

Apr 5, 2024 · Heavier than an average gorilla and similar in length to a Komodo dragon, Hayden’s bone-crushing dog (Epicyon haydeni) was the largest dog species ever. The colossal canine existed for about 15 million years during the mid-late …

Mar 17, 2017 · An in-depth profile of Epicyon, including this prehistoric dog's characteristics, behavior and habitat.

Mar 23, 2025 · Science has placed Epicyon haydeni in the Middle to Late Miocene epoch, spanning the Clarendonian to early Hemphillian North American land mammal ages (NALMA), approximately 12 to 6 million years...

Epicyon haydeni was possibly the biggest dog to ever roam the planet. They definitely lived up to the Borophaginae subfamily’s ‘bone-crushing’ name.

Nov 28, 2022 · The Epicyon haydeni was a species of dog that lived from the Early Miocene to the Late Miocene. This was around 5 to 20 million years ago. It belonged to the sub-family of Borophaginae or “bone-crushing dogs” and weighed about 200 to 300 lbs. Fossils of this species of Epicyon were found in several regions all over North America. Epicyon haydeni.

Epicyon was one of the largest true prehistoric dogs to ever live in North America. They lived approximately 15 to 5 million years ago – from the Middle through Late Miocene Periods. It was first discovered in the mid-nineteen century and was named by Joseph Leidy in 1858.

Jun 6, 2014 · Although it had a skull more like that of a big cat,‭ ‬Epicyon was an early ancestor to canines.‭ ‬Epicyon is noted for having an incredibly powerful body that may have weighed up to one hundred and seventy kilograms‭ (‬for Epicyon haydeni‭)‬.‭ ‬Its unusually shaped skull meant that Epicyon had a very short muzzle ...