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Phlaocyon (from Greek phlao, "eat greedily" and cyon, "dog") [1] is an extinct genus of the Borophaginae subfamily of canids native to North America. It lives from the Early Oligocene to the Early Miocene epoch 33.3–16.3 Mya, existing for approximately 2] It is closely related to Cynarctoides.
Amphicyonidae is an extinct family of terrestrial carnivorans belonging to the suborder Caniformia.They first appeared in North America in the middle Eocene (around 45 mya), spread to Europe by the late Eocene (35 mya), and further spread to Asia and Africa by the early Miocene (23 mya).
Amphicyon is an extinct genus of large carnivorans belonging to the family Amphicyonidae (known colloquially as "bear-dogs"), subfamily Amphicyoninae, from the Miocene epoch. Members of this family received their vernacular name for possessing bear-like and dog-like features. They ranged over North America, Europe, Asia, and Africa.
Canids vary in size, including tails, from the 2 meter (6 ft 7 in) wolf to the 46 cm (18 in) fennec fox. Population sizes range from the Falkland Islands wolf , extinct since 1876, to the domestic dog, which has a worldwide population of over 1 billion. [ 1 ]
Epicyon had a massive head and powerful jaws that were well adapted for bone-crushing, with enlarged fourth premolars like some hyenas, giving its skull a lion-like shape rather than having a skull similar in shape to that of a wolf; the adaptation would have allowed Epicyon to scavenge as well as hunt, giving it access to the nutritious marrow other contemporary carnivores couldn't access.
Cynodesmus ("dog link") is an extinct genus of omnivorous canine which inhabited North America during the Oligocene living from 33.3—-26.3 Ma and existed for approximately 1] Cynodesmus was one of the first canids to truly look dog-like.
Xenocyon ("strange dog") is an extinct group of canids, either considered a distinct genus [2] or a subgenus of Canis.The group includes Canis (Xenocyon) africanus, Canis (Xenocyon) antonii and Canis (Xenocyon) falconeri that gave rise to Canis (Xenocyon) lycanoides. [3]
Hesperocyon was assigned to Borophagini by Wang et al. in 1999 [2] and was the earliest of the canids to evolve after the Caniformia-Feliformia split some 42 million years ago. Fossil evidence dates Hesperocyon gregarius to at least 37 mya, but the oldest Hesperocyon has been dated at 39.74 mya from the Duchesnean North American land mammal age .