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Whole genome sequencing indicates that Urocyon is the most basal genus of the living canids. [8] Fossils of what is believed to be the ancestor of the gray fox, Urocyon progressus, have been found in Kansas and date to the Upper Pliocene, [9] with some undescribed specimens dating even older. [10]
The gray fox (Urocyon cinereoargenteus), or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America.This species and its only congener, the diminutive island fox (Urocyon littoralis) of the California Channel Islands, are the only living members of the genus Urocyon, which is considered to be genetically sister to all other living canids.
Urocyon †Urocyon cinereoargenteus †Urocyon progressus †Ustatochoerus; Vallonia †Vallonia gracilicosta †Vallonia pulchella; Valvata †Valvata tricarinata; Vertigo †Vertigo ovata; Vulpes. A living Vulpes velox, or swift fox †Vulpes velox; Zapus †Zapus hudsonius; Zonitoides †Zonitoides arboreus †Zonitoides nitidus
†Nekrolagus progressus – type locality for species; Neofiber †Neofiber leonardi – type locality for species; Neogale †Neogale frenata – or unidentified comparable form †Neogale vison; Life restoration of a herd of Neohipparion. Robert Bruce Horsfall (1913). †Neohipparion †Neohipparion affine – or unidentified comparable form
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Hesperocyoninae are basal canids that gave rise to the other two canid subfamilies, the Borophaginae and Caninae. [2] This subfamily was endemic to North America, living from the Duchesnean stage of the Late Eocene through to the early Barstovian stage of the Miocene, lasting around 20 million years.
Its sister taxon is the extant Urocyon; together, the two genera form a clade based on dentition. These same dental characteristics are shared by Otocyon and ...
Cerdocyonina is a natural lineage whose common ancestor was sister to the Eucyon–Canis–Lycaon lineage. It is represented in the fossil record by Cerdocyon 6–5 million years ago, and by Theriodictis and Chrysocyon 5–4 million years ago.