Amphicyonidae is an extinct family of terrestrial carnivorans belonging to the suborder Caniformia. They first appeared in North America in the middle Eocene, spread to Europe by the late Eocene, and appear in Asia, and Africa by the early Miocene. They had largely disappeared worldwide by the late Miocene, with the latest recorded species at the end of the Miocene in Pakistan. They were among the first carnivorans to evolve large body size. Later in their history, they came into competition with hesperocyonine and borophagine canids. As dogs evolved similar body sizes and cranial and dental adaptations, the rise of these groups may have led to their extinction. Amphicyonids are often colloquially referred to as "bear-dogs".
Miacis is a genus of extinct carnivorous mammals that appeared in the late Paleocene and continued through the Eocene. The genus Miacis is not monophyletic but a diverse collection of species that belong to the stemgroup within the Carnivoramorpha. As such, most Miacis species belong to the group of early carnivores that represent the ancestors of the modern order, the crown-group Carnivora. However, the species Miacis cognitus is placed not in the stem-group but among the Caniformia, one of the two suborders of the crown-group Carnivora.
Amphicyon is an extinct genus of large carnivorous bone-crushing mammals, popularly known as bear dogs, of the family Amphicyonidae, subfamily Amphicyoninae, from the Burdigalian Epoch until the late Pliocene, with the creature having bear-like and dog-like features. They ranged over North America, Europe, Asia, and Africa from 16.9 to 2.6 Ma ago, existing for approximately 14.3 million years.
Daphoenodon is an extinct genus of terrestrial carnivore, which lived in the early Miocene and belonged to the family Amphicyonidae of the suborder Caniformia. The species of Daphoenodon are characterized by limbs that are specialized in fore and aft movement, as well as a body alignment that results in a lengthened stride.
Agnotherium is a genus of large sized carnivoran mammals, belonging to the Amphicyonidae, which has been found in Western Europe, and possibly Northern Africa, and lived during the Late Miocene epoch. Despite only being known from fragmentary remains, the genus notable for hypercarnivorous adaptions, which have been said to represent the "apex" among its family.
Brachycyon is an extinct genus of terrestrial carnivores belonging to the suborder Caniformia, family Amphicyonidae, which inhabited Eurasia and North America.
Haplocyonoides is an extinct genus of terrestrial carnivores belonging to the suborder Caniformia, family Amphicyonidae, and which inhabited Europe from the Early Miocene subepoch —(16.9 Mya). Haplocyonoides existed for approximately 3.1 million years.
Pseudarctos is a member of the extinct family Amphicyonidae of terrestrial carnivores belonging to the suborder Caniformia, which inhabited Eurasia in the Middle Miocene subepoch 16.9—11.1 Ma, existing for approximately 5.8 million years.
Pseudamphicyon is a member of the extinct family Amphicyonidae of terrestrial carnivores belonging to the suborder Caniformia.
Pseudocyonopsis is a member of the extinct family Amphicyonidae, a terrestrial carnivore belonging to the order Caniformia.
Ysengrinia is an extinct genus of carnivoran in the family Amphicyonidae (beardogs), which lived in Europe, Asia, and North America during the Early Miocene. It was also reported from Egypt and Namibia, but this material has been reassigned to other genera of beardogs.
Harpagophagus is an extinct genus of large, mostly carnivorous bone-crushing mammals known as bear dogs, of the family Amphicyonidae endemic to Europe during the Oligocene living from 33.9 to 23.03 Ma and existed for approximately 10.87 million years.
Arctoidea is a clade of mostly carnivorous mammals which include the extinct Hemicyonidae (dog-bears), and the extant Musteloidea, Pinnipedia, and Ursidae (bears), found in all continents from the Eocene, 46 million years ago, to the present. The oldest group of the clade is the bears, as their CMAH gene is still intact. The gene became non-functional in the common ancestor of the Mustelida. Arctoids are caniforms, along with dogs (canids) and extinct bear dogs (Amphicyonidae). The earliest caniforms were superficially similar to martens, which are tree-dwelling mustelids. Together with feliforms, caniforms comprise the order Carnivora; sometimes Arctoidea can be considered a separate suborder from Caniformia and a sister taxon to Feliformia.
Amphicyoninae is a subfamily of extinct bear-dogs, large terrestrial carnivores belonging to the suborder Caniformia and which inhabited North America, Eurasia, and Africa from ~37.2—2.6 Ma. Amphicyoninae existed for approximately ~34.6 million years.
Amphicyanis is an extinct genus of terrestrial carnivores belonging to the suborder Caniformia, family Amphicyonidae, and which inhabited Eurasia and North America.
Gustafsonia is an extinct genus of carnivoran belonging to the family Amphicyonidae. The type species, Gustafsonia cognita, was described in 1986 by Eric Paul Gustafson, who originally interpreted it as a miacid and named it Miacis cognitus. It was subsequently considered to be the only species of the diverse genus Miacis that belonged to the crown-group Carnivora, within the Caniformia, and it was ultimately assigned to the family Amphicyonidae. The type specimen or holotype was discovered in Reeve's bonebed, western Texas, in the Chambers Tuff Formation in 1986. The University of Texas holds this specimen. It is the only confirmed fossil of this species.
Daphoenictis is an extinct cat-like genus of the family Amphicyonidae (bear-dogs), subfamily Daphoeninae, endemic to North America during the Late Eocene subepoch, existing for approximately 3.3 million years. Daphoenictis' geographical range was mid-western North America; from central Canada, to Texas, U.S. Only one species is known, Daphoenictis tedfordi.
Angelarctocyon is an extinct genus of Amphicyonidae, which belongs to the order Carnivora.
Magericyon is an extinct genus of Amphicyonid ("bear-dog") that lived during the Miocene 10-9 Ma in what is now Spain.
Tartarocyon is an extinct genus of Amphicyonidae, who lived during the late Middle Miocene. It was described after fossilized remains found in Sallespisse, France. Despite the scarceness of its fossil remains, being only known from the holotype mandible, its body mass has been estimated to be close to 200 kilograms, far from its closest relative, Cynelos, and making it one of the largest terrestrial predators of Miocene Europe. T. cazanavei is the only species included in the genus. The genus was named after a southwestern French Pyrenees legend of a man eating giant ; the species name honors the owner of the terrain in which the holotype has been discovered.
