MacAdams Quarry (Miocene of the United States)

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 (13.6 - 10.3 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

 Perissodactyla - Rhinocerotidae
Teleoceras major10 Hatcher 1894 rhinoceros
 Perissodactyla - Equidae
Hippotherium sp.1 Kaup 1832 hipparionine horse
JA pers. obs.: large, shallow- notch "occidentale"
Cormohipparion fricki n. sp.14 Woodburne 2007 hipparionine horse
Pseudhipparion hessei n. sp.13 Webb and Hulbert 1986 hipparionine horse
Neohipparion affine8 Leidy 1869 hipparionine horse
Hipparion tehonense8 Merriam 1916 hipparionine horse
probably includes Nannippus "A" of Hulbert 1989 pers. commun.: JA pers. obs. 1/93
Pliohippus fossulatus4 Cope 1893 horse
Protohippus supremus7 Leidy 1869 horse
Calippus martini Hesse 1936 horse
pers. commun.
Calippus regulus7 Johnston 1937 horse
Calippus placidus Leidy 1869 horse
pers. commun.
Hypohippus affinis11 Leidy 1858 anchitheriine horse
 Carnivora - Barbourofelidae
Barbourofelis whitfordi Barbour and Cook 1915 carnivoran
pers. commun.
 Carnivora - Mustelidae
Mionictis sp.6 Matthew 1924 otter
 Carnivora - Canidae
Cynarctus crucidens12 Barbour and Cook 1914 bone-crushing dog
Aelurodon taxoides11 Hatcher 1894 bone-crushing dog
confirmed by Wang et al. 1999
Epicyon saevus2 Leidy 1858 bone-crushing dog
confirmed by Wang et al. 1999
Paratomarctus euthos12 McGrew 1935 bone-crushing dog
 Ungulata - Merycoidodontidae
"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1
"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1 Frick 1929 oreodont
 Ungulata - Tayassuidae
Tayassuidae indet.1 Palmer 1897 peccary
 Ungulata - Camelidae
Camelidae indet.1 Gray 1821 camel
Aepycamelus sp.3 Macdonald 1956 camel
 Ungulata - Protoceratidae
Paratoceras macadamsi n. sp.5 Frick 1937 protoceratid
see also Patton and Taylor 1973
Synthetoceras tricornatus9 Stirton 1932 protoceratid
 Ungulata - Palaeomerycidae
"Cranioceras clarendonensis n. sp." = Cranioceras teres5
"Cranioceras clarendonensis n. sp." = Cranioceras teres5 Cope 1874 ruminant
see also Webb 1983
 Ungulata - Moschidae
Longirostromeryx clarendonensis n. sp.5 Frick 1937 musk deer
also at "Carrell Creek"