|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Perissodactyla - Equidae
It was synonymized subjectively with Protohippus perditus by Matthew (1899); it was recombined as Merychippus labrosus by Hay (1902), Cope and Matthew (1915) and Osborn (1918); it was considered a nomen dubium by Gidley (1907), Galbreath (1953) and Macdonald (1992).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.