''Notohippus'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of notoungulate mammal from the Early Miocene (

Santacrucian The Santacrucian age is a period of geologic time (17.5 – 16.3 Ma) within the Early Miocene epoch of the Neogene, used more specifically with SALMA classification in South America. It follows the Colhuehuapian and precedes the Friasian age. ...

in the SALMA classification) Santa Cruz Formation, Río Bote,

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

.''Notohippus''
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...

.org

Description

''Notohippus'' had high crowned teeth with cementum, similar to the situation of grazing

equids Equidae (sometimes known as the horse family) is the taxonomic family of horses and related animals, including the extant horses, asses, and zebras, and many other species known only from fossils. All extant species are in the genus '' Equus'', w ...

.Rose, Kenneth D. ''The beginning of the age of mammals.'' JHU Press, 2006.

References

Toxodonts Miocene mammals of South America Santacrucian Neogene Argentina Fossils of Argentina Fossil taxa described in 1891 Taxa named by Florentino Ameghino Prehistoric placental genera Austral or Magallanes Basin Santa Cruz Formation {{paleo-mammal-stub