PBDB Collection

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 (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

Show authors, comments, and common names

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

¹Alroy 2002; ²Baskin 1998; ³Breyer 1983; ⁴Dalquest and Hughes 1966; ⁵Frick 1937; ⁶Harrison 1981; ⁷Hulbert 1988; ⁸MacFadden 1984; ⁹Patton and Taylor 1971; ¹⁰Prothero 2005; ¹¹Schultz 1990; ¹²Wang et al. 1999; ¹³Webb and Hulbert 1986; ¹⁴Woodburne 2007