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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, Amerhippus Hoffstetter 1950 [invalid subgroup], Asinus Gray 1822, Asinus taeniopus Heuglin 1861 [nomen dubium], Equus (Amerhippus) Hoffstetter 1950 [invalid subgroup], Equus (Asinus) Gray 1822, Equus (Hemionus) tau Owen 1869 [nomen dubium], Equus (Plesippus) Matthew 1924, Equus asinus taeniopus Heuglin 1861 [nomen dubium], Equus semiplicatus Cope 1893 [nomen dubium], Equus taeniopus Heuglin 1861 [nomen dubium], Equus tau Owen 1869 [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. Editio decima, reformata. Laurentii Salvii, Holmiae (Lars Salvius, Stockholm)

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

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

Subtaxa: Equus (Amerhippus) andium, Equus (Amerhippus) insulatus, Equus (Amerhippus) martinei, Equus (Amerhippus) santaeelenae, 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 niobrarensis, Equus occidentalis, Equus pacificus, Equus pectinatus, Equus przewalskii, Equus pseudaltidens, Equus quagga, Equus santaeelenae, Equus scotti, Equus simplicidens, Equus tabeti, Equus yunnanensis, Equus zebra

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Ecology: ground dwelling grazer