Equinae

{{Short description|Subfamily of mammals}}

{{Automatic taxobox

| fossil_range = {{fossilrange|Early Miocene|Recent}}

| image = Przewalskis horse 02.jpg

| image_caption = Przewalski's horse

| taxon = Equinae

| authority = {{smallcaps|Steinmann & Döderlein 1890}}

| subdivision_ranks = Tribes

| subdivision = Equini
†Hipparionini

| synonyms =

}}

Equinae is a subfamily of the family Equidae, known from the Hemingfordian stage of the Early Miocene (16 million years ago) onwards.{{Cite web |url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=65578 |title=Paleobiology Database: Equinae basic info. |access-date=2009-08-03 |archive-date=2009-06-21 |archive-url=https://web.archive.org/web/20090621104327/http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=65578&is_real_user=1 |url-status=live }}{{cite journal|url=http://science.sciencemag.org/content/355/6325/627.full|title=Decoupled ecomorphological evolution and diversification in Neogene-Quaternary horses|first1=Juan L.|last1=Cantalapiedra|first2=Jose Luis L.|last2=Prado|first3=Manuel|last3=Hernández Fernández|first4=Mª Teresa|last4=Alberdi|date=10 February 2017|journal=Science|volume=355|issue=6325|pages=627–630|accessdate=13 February 2019|via=Escience.magazine.org|doi=10.1126/science.aag1772|pmid=28183978 |bibcode=2017Sci...355..627C |url-access=subscription}} They originated in North America, before dispersing to every continent except Australia and Antarctica. They are thought to be a monophyletic grouping.B. J. MacFadden. 1998. Equidae. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary Mammals of North America Members of the subfamily are referred to as equines;{{cite book |chapter-url=https://link.springer.com/chapter/10.1007/978-3-031-27144-1_2|chapter=Evolutionary Radiation of Equids|first1=Juan L.|last1=Cantalapiedra|first2=Oscar L.|last2=Sanisdro|first3=Enrique|last3=Cantero|first4=Jose Luis|last4=Prado|first5=Mª Teresa Luis|last5=Alberdi| editor1-first= Herbert H.| editor1-last=Prins | editor2-first= Ian J.| editor2-last= Gordon | date=4 August 2023|publisher=Springer|title=The Equids, A Suite of Splendid Species|series=Fascinating Life Sciences |pages=27–45|via=www.springer.com|doi=10.1007/978-3-031-27144-1_2|isbn=978-3-031-27143-4 }} the only extant equines are the horses, asses, and zebras of the genus Equus, with two other genera Haringtonhippus and Hippidion becoming extinct at the beginning of the Holocene, around 11–12,000 years ago.

The subfamily contains two tribes, the Equini and the Hipparionini, as well as two unplaced genera, Merychippus and Scaphohippus. Members of the family ancestrally had three toes, while members of the tribe Equini from the Middle Miocene onwards developed monodactyl feet.{{Cite journal |last1=Janis |first1=Christine M. |last2=Bernor |first2=Raymond L. |date=2019-04-12 |title=The Evolution of Equid Monodactyly: A Review Including a New Hypothesis |journal=Frontiers in Ecology and Evolution |volume=7 |doi=10.3389/fevo.2019.00119 |issn=2296-701X |doi-access=free |hdl=1983/ede09e37-96f7-4baf-aec5-1bb7766a04e7 |hdl-access=free }}