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Haplohippus

Description

Haplohippus is an extinct genus of the modern horse family Equidae, that lived in the Eocene, from 42 to 38 million years ago. Fossil remains of Haplohippus have been found in the Clarno Formation, part of the John Day Fossil Beds National Monument of the Northwestern United States. While Haplohippus is quite similar to Orohippus, it is considered more primitive in character than Epihippus.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)4830497https://www.gbif.org/species/4830497
PaleoBioDB ID (PBDB)42998https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=42998
Rankgenus
Taxonomy (GBIF)Life : Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Haplohippus
Taxonomy (PBDB)Life : Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Haplohippus
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SynapsidaOsborn 1903
-Therapsida
infraorderCynodontia
-EpicynodontiaHopson and Kitching 2001
infraorderEucynodontiaKemp 1982
-ProbainognathiaHopson 1990
-MammaliamorphaRowe 1988
-MammaliaformesRowe 1988
classMammaliaLinnaeus 1758
subclassTribosphenida
infraclassEutheria
-PlacentaliaOwen 1837
orderPerissodactyla
suborderLophodontomorphaHooker and Dashzeveg 2004
infraorderEuperissodactylaHooker and Dashzeveg 2004
-Hippomorpha
superfamilyEquoideaHay 1902
familyEquidaeGray 1821
subfamilyHyracotheriinaeCope 1881
genusHaplohippusMcGrew 1953
Scientific NameHaplohippus McGrew, 1953
Name Published InFieldiana: Geol., 10
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Haplohippusgenusbelongs to Hyracotheriinaestated with evidenceMcGrew, 1953
Haplohippusgenusbelongs to EquidaeimpliedCarroll, 1988
Haplohippusgenusbelongs to Equidaestated without evidenceProthero and Schoch, 1989
Haplohippusgenusbelongs to Hyracotheriinaestated with evidenceMacFadden, 1998
Status (PBDB)extinct
Taxon Size (PBDB)2
First Recorded Appearance40.4 - 37.2 Ma
Eocene
Last Recorded Appearance40.4 - 37.2 Ma
Eocene
Environmentterrestrial (based on Eutheria)
Motilityactively mobile (based on Osteichthyes)
Dietbrowser (based on Equidae)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)P. O. McGrew. 1953. A new and primitive Early Oligocene horse from Trans-Pecos Texas. Fieldiana Geology 10(15):167-171
Wikipediahttps://en.wikipedia.org/wiki/Haplohippus

Fossil Distribution

Subtaxa

NameStatusCommon Name(s)Fossil OccurrencesOldestYoungest
Haplohippus texanus
species
accepted (GBIF)
listed (PBDB)
240.4 Ma
Eocene
40.4 Ma
Eocene

Synonymy List

YearName and Author
1953Haplohippus McGrew
1988Haplohippus Carroll
1989Haplohippus Prothero and Schoch p. 531
1998Haplohippus MacFadden p. 543

References

McGrew P. O. (1953) A new and primitive Early Oligocene horse from Trans-Pecos Texas, Fieldiana Geology 10 15, 167-171
Carroll R. L. (1988) , Vertebrate Paleontology and Evolution, 1-698
Prothero D. R., Schoch R. M. (1989) Classification of the Perissodactyla, The Evolution of Perissodactyla, 530-537
MacFadden B. J. (1998) Equidae, Evolution of Tertiary Mammals of North America 1, 537-559
Fieldiana: Geol., 10 - via The Interim Register of Marine and Nonmarine Genera
Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera
SN2000/McKenna & Bell, 1997 - via The Interim Register of Marine and Nonmarine Genera
SN2000: Brands, S. J. (compiler) 1989-2005. Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Available online at http://sn2000.taxonomy.nl/. - via The Interim Register of Marine and Nonmarine Genera
as per family - via The Interim Register of Marine and Nonmarine Genera
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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