Equus semiplicatus

{{Short description|Extinct species of mammal}}

{{Speciesbox

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| fossil_range = {{fossil range|2.588|0.009}}

| extinct = yes

| parent = Incertae sedis/Equus

| genus = Equus

| species = semiplicatus

| authority = E. D. Cope, 1893E. D. Cope. 1893. A preliminary report on the vertebrate paleontology of the Llano Estacado. Fourth Annual Report of the Geological Survey of Texas 1892:11-136

| synonyms = *Onager semiplicatus (Cope, 1893)

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Equus semplicatus was a Pleistocene species of New World stilt-legged horse,{{Cite journal|title=The genus Equus in North America: The Pleistocene species|url=http://cat.inist.fr/?aModele=afficheN&cpsidt=2022200|journal=Palaeontographia Italica|volume=85|issn=0373-0972}} and considered the type species for the stilt legged horses, one of three lineages of equids within the Americas,{{Cite journal|last=Sandom, Faurby, Sandel, Svenning|first=Christopher, Søren, Brody, Jens-Christian|date=13 May 2014|title=Global late Quaternary megafauna extinctions linked to humans, not climate change|journal=Proc. R. Soc. B|volume=281|issue=1787|pages=20133254|doi=10.1098/rspb.2013.3254|pmid=24898370|pmc=4071532}} the other two being hippidionid and caballine horses.{{Cite journal|last1 = Naundrup|first1 = Pernille Johansen|last2 = Svenning|first2 = Jens-Christian|date = 2015-07-15|title = A Geographic Assessment of the Global Scope for Rewilding with Wild-Living Horses (Equus ferus)|journal = PLOS ONE|volume = 10|issue = 7|doi = 10.1371/journal.pone.0132359|issn = 1932-6203|pmc = 4503665|pmid = 26177104|page=e0132359|bibcode = 2015PLoSO..1032359N|doi-access = free}} Now extinct, Equus semiplicatus once inhabited North America.{{Cite web|url = https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=46306|title = Fossilworks: Equus semiplicatus|website = fossilworks.org|access-date = 17 December 2021}}

Fossils found William's Cave in Texas have been identified as Equus semiplicatus.