Also known as Grant Quarry; Porter Ranch
Where: Donley County, Texas (35.0° N, 100.8° W: paleocoordinates 35.5° N, 98.3° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Clarendonian (12.5 - 9.4 Ma)
Environment/lithology: terrestrial; lithology not reported
Primary reference: R. C. Hulbert, Jr. 1989. Phylogenetic Interrelationships and Evolution of North American Late Equidae. In D. R. Prothero and R. M. Schoch (eds.), The Evolution of Perissodactyls [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 18244: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
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"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1
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Longirostromeryx clarendonensis n. sp.5
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"Cranioceras clarendonensis n. sp." = Cranioceras teres5
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Hypohippus affinis11, Protohippus supremus7, Calippus placidus, Calippus regulus7, Calippus martini, Pliohippus fossulatus4, Pseudhipparion hessei n. sp.13, Neohipparion affine8, Cormohipparion fricki n. sp.14, Hippotherium sp.1, Hipparion tehonense8
Hipparion tehonense8 Merriam 1916 hipparionine horse probably includes Nannippus "A" of Hulbert 1989 pers. commun.: JA pers. obs. 1/93
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