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Equus Linnaeus 1758 (horse)

Osteichthyes - Perissodactyla - Equidae

The genus Equus includes many extinct species in addition to the living domestic horse, zebras, and asses. It originated in North America and emigrated to the Old World during the Pliocene. In the 1920s a spectacular mass mortality assemblage of the primitive species Equus simplicidens was found at the Gidley Horse Quarry in Idaho. Before the end-Pleistocene megafaunal mass extinction several species of horses lived in North America. Pleistocene horses fossils are very common, but their taxonomy is still poorly resolved because many of the older species names were based on poor type specimens.

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Invalid subtaxa: Allozebra Trumler 1961, Asinus Gray 1822, Asinus africanus Fitzinger 1858 [nomen nudum], Equus (Asinus) Gray 1822, Equus (Plesippus) Matthew 1924, Equus semiplicatus Cope 1893 [nomen dubium], Neohippus Abel 1913, Onager Quinn 1955, Plesippus Matthew 1924

Full reference: C. Linnaeus. 1758. Systema Naturae per Regna Tria Naturae, secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis. Tomus I. Laurentii Salvii, Holmiae (Stockholm) 1-823

Parent taxon: Equini according to B. J. MacFadden 1998

Sister taxa: Astrohippus, Calippus, Dinohippus, Heteropliohippus, Hippidion, Onohippidium, Parapliohippus, Pliohippus, Protohippina, Protohippus, Protohippus pachyops

Subtaxa: Equus (Amerhippus), Equus (Asinus) kiang, Equus (Dolichohippus), Equus (Hemionus), Equus (Hippotigris), Equus africanus, Equus alaskae, Equus asinus, Equus australis, Equus caballus, Equus complicatus, Equus conversidens, Equus crenidens, Equus cumminsii, Equus curvidens, Equus enormis, Equus excelsus, Equus francisci, Equus fraternus, Equus fromanius, Equus giganteus, Equus holmesi, Equus idahoensis, Equus jubatus, Equus leidyi, Equus mexicanus, Equus nalaikhaensis, Equus nearcticus, Equus nevadanus, Equus niobrarensis, Equus occidentalis, Equus pacificus, Equus parastylidens, Equus pectinatus, Equus przewalskii, Equus pseudaltidens, Equus quagga, Equus santaeelenae, Equus scotti, Equus simplicidens, Equus tabeti, Equus taeniopus, Equus tau, Equus yunnanensis, Equus zebra, Plesippus francescana

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Ecology: ground dwelling grazer