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Archaeohippus blackbergi
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).
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
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Synonymy list
Year | Name and author |
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1924 | Miohippus blackbergi Hay pp. 4-5 |
1924 | Parahippus minutalis Hay p. 6 |
1932 | Archaeohippus nanus Simpson p. 28 figs. 14 - 17 |
1937 | Parahippus minutalis Schlaikjer p. 271 |
1937 | Archaeohippus blackbergi Wood and Wood |
1940 | Archaeohippus blackbergi Stirton p. 176 |
1940 | Archaeohippus minutalis Stirton p. 176 |
1940 | Archaeohippus nanus Stirton p. 176 |
1942 | Parahippus blackbergi White |
1955 | Archaeohippus nanus Quinn |
1955 | Archaeohippus blackbergi Quinn p. 12 |
1956 | Archaeohippus blackbergi Bader |
1975 | Archaeohippus blackbergi Forsten p. 3 |
1998 | Archaeohippus blackbergi Emry and Eshelman |
1998 | Archaeohippus blackbergi MacFadden p. 546 |
2003 | Archaeohippus blackbergi O'Sullivan |
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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.
†Archaeohippus blackbergi Hay 1924
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Invalid names: Archaeohippus nanus Simpson 1932 [synonym], Parahippus minutalis Hay 1924 [synonym]
Diagnosis
Reference | Diagnosis | |
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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 1975 | Small, 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
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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 |
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Miocene | USA (Florida) | Parahippus blackbergi (18522) | |
Miocene | USA (Texas) | Archaeohippus blackbergi (18685) | |
Burdigalian | USA (Delaware) | Archaeohippus blackbergi (18579) | |
Early/Lower Hemingfordian | USA (Texas) | Archaeohippus blackbergi (18694) | |
Hemingfordian | USA (South Dakota) | Archaeohippus blackbergi (17912) | |
Hemingfordian | USA (Texas) | Archaeohippus blackbergi (18617 18635) Archaeohippus blackbergi, Miohippus blackbergi, Parahippus sp. (type locality: 18626) | |
Hemingfordian | USA (Florida) | Archaeohippus nanus (18561) Parahippus blackbergi (18586 18597) | |
Late/Upper Hemingfordian | USA (Florida) | Archaeohippus blackbergi (18512) |