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Archaeohippus blackbergi

Mammalia - Perissodactyla - Equidae

Taxonomy
Miohippus blackbergi was named by Hay (1924). It is a 3D body fossil. Its type locality is Garvin Gully, which is in a Hemingfordian terrestrial horizon in the Oakville Formation of Texas.

It was recombined as Parahippus blackbergi by White (1942); it was recombined as Archaeohippus blackbergi by Wood and Wood (1937), Stirton (1940), Quinn (1955), Bader (1956), Forsten (1975), MacFadden (1998), Emry and Eshelman (1998) and O'Sullivan (2003).

Synonyms
Synonymy list
YearName and author
1924Miohippus blackbergi Hay pp. 4-5
1924Parahippus minutalis Hay p. 6
1932Archaeohippus nanus Simpson p. 28 figs. 14 - 17
1937Parahippus minutalis Schlaikjer p. 271
1937Archaeohippus blackbergi Wood and Wood
1940Archaeohippus blackbergi Stirton p. 176
1940Archaeohippus minutalis Stirton p. 176
1940Archaeohippus nanus Stirton p. 176
1942Parahippus blackbergi White
1955Archaeohippus nanus Quinn
1955Archaeohippus blackbergi Quinn p. 12
1956Archaeohippus blackbergi Bader
1975Archaeohippus blackbergi Forsten p. 3
1998Archaeohippus blackbergi Emry and Eshelman
1998Archaeohippus blackbergi MacFadden p. 546
2003Archaeohippus blackbergi O'Sullivan

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyAnchitheriinae()
genusArchaeohippus
speciesblackbergi()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

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Invalid names: Archaeohippus nanus Simpson 1932 [synonym], Parahippus minutalis Hay 1924 [synonym]
Diagnosis
ReferenceDiagnosis
G. G. Simpson 1932 (Archaeohippus nanus)An Archaeohippus about 10% smaller than A. ultimus. Slightly lower crowned than that species or A. penultimus. P1 relatively large, M3 reduced. M3 subtriangular, hypocone small and not fully internal. Lower grinders generally with external and internal cingula. Feet (referred) Parahippus-like, metapodials relatively long and slender.
A. -M. Forsten 1975Small, brachyodont. Upper cheek teeth with metaloph connected to ectoloph, or occasionally disconnected. Marked protoconule, slight or submerged metaconule. Crochet variable, disconnected or rarely connected to protoloph in deciduous teeth; additional plications on metaloph rare. Anterior cingulum well developed, slight lingual cingulum. Lower cheek teeth with metaconid and metastylid usually separated. Anterior and posterior cingulum; labial cingulum variable. Cement rare. M3/3 reduced relative to M2/2
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserf
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-31 16:55:50
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Ji et al. 2002, Nowak 1991, Lillegraven 1979, Carroll 1988

Age range: Early/Lower Hemingfordian or 20.43000 to 15.97000 Ma

Collections (12 total)


Time interval Ma Country or state Original ID and collection number
Miocene23.03 - 5.333USA (Florida) Parahippus blackbergi (18522)
Miocene23.03 - 5.333USA (Texas) Archaeohippus blackbergi (18685)
Burdigalian20.44 - 15.97USA (Delaware) Archaeohippus blackbergi (18579)
Early/Lower Hemingfordian20.43 - 15.97USA (Texas) Archaeohippus blackbergi (18694)
Hemingfordian20.43 - 15.97USA (South Dakota) Archaeohippus blackbergi (17912)
Hemingfordian20.43 - 15.97USA (Texas) Archaeohippus blackbergi (18617 18635) Archaeohippus blackbergi, Miohippus blackbergi, Parahippus sp. (type locality: 18626)
Hemingfordian20.43 - 15.97USA (Florida) Archaeohippus nanus (18561) Parahippus blackbergi (18586 18597)
Late/Upper Hemingfordian20.43 - 15.97USA (Florida) Archaeohippus blackbergi (18512)