''Calippus'' is an extinct genus of hoofed mammals in the horse family ( Equidae), known from the

Middle Miocene The Middle Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0.05 Ma to 11.608 ± 0.005 Ma (million y ...

through the Early Pliocene of North and Central America. Fossils have been found in the Central United States and the Eastern United States, ranging south to Honduras. These equines had high crowned teeth and a quadrangular, wide muzzle, and were small compared to their contemporary relatives, with ''C. elachistus'' weighing 49 kg, ''C. cerasinus'' weighing 102 kg, 132 kg for ''C. theristes'' and 73 kg for ''C. mccartyi''.

References

Miocene horses Pliocene Perissodactyla Prehistoric placental genera Neogene mammals of North America Barstovian Clarendonian Hemphillian Blancan Fossil taxa described in 1930 Equini {{paleo-oddtoedungulate-stub