PBDB Collection

Crookston Bridge Quarry (Miocene of the United States)

Also known as Merycodus Quarry; UNSM Cr-15

Where: Cherry County, Nebraska (42.8° N, 100.8° W: paleocoordinates 43.4° N, 97.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Crookston Bridge Member (Valentine Formation), Barstovian (16.3 - 12.5 Ma)

Environment/lithology: terrestrial

Primary reference: M. R. Voorhies. 1990. Vertebrate paleontology of the proposed Norden Reservoir Area, Brown, Cherry and Keya Paha counties, Nebraska. Technical Report, Division of Archeological Research, Department of Anthropology, University of Nebraska 82-09 [J. Alroy/J. Alroy/J. Alroy]more details

PaleoDB collection 18109: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Richard Hulbert

Creative Commons license: CC BY (attribution)

Taxonomic list

• "more than 700" UNSM specimens: Skinner and Johnson 1984

Show authors, comments, and common names

Aves
Ciconiiformes - Ciconiidae	Mycteria milleri⁶ Mycteria milleri⁶ Short 1966 stork
Reptilia
Testudines - Emydidae	Glyptemys valentinensis³ Glyptemys valentinensis³ Holman and Fritz 2001 turtle
Mammalia
Rodentia - Castoridae	Monosaulax skinneri⁵, Prodipoides burgensis⁵ Monosaulax skinneri⁵ Stout 1999 beaver Prodipoides burgensis⁵ Korth 2002 beaver
Rodentia - Mylagaulidae	Ceratogaulus rhinocerus⁴ Ceratogaulus rhinocerus⁴ Matthew 1902 rodent
Carnivora - Mustelidae	Mionictis sp.² Mionictis sp.² Matthew 1924 otter said to be new and the same as Myers Farm species; listed as M. sp. by Voorhies 1990, and Mionictis omitted from Myers Farm by Voorhies
Carnivora - Canidae	Leptocyon vafer⁷, Aelurodon ferox⁸, Paratomarctus temerarius⁸ Leptocyon vafer⁷ Leidy 1858 canine may include specimen of Skinner and Johnson 1984 from just above quarry but in the same member: see their section 27, p. 339 Aelurodon ferox⁸ Leidy 1858 bone-crushing dog Paratomarctus temerarius⁸ Leidy 1858 bone-crushing dog
Artiodactyla - Antilocapridae	Ramoceros cf. osborni⁷, Merycodus warreni⁷ Ramoceros cf. osborni⁷ Matthew 1904 pronghorn presumably includes "R. howardae" of Frick 1937 Merycodus warreni⁷ Leidy 1858 pronghorn includes type of "Merycodus warreni johnsoni": see Frick 1937
Artiodactyla - Camelidae	Procamelus occidentalis⁷ Procamelus occidentalis⁷ Leidy 1858 camel
Perissodactyla - Equidae	Merychippus cf. insignis⁷, Protohippus perditus⁷, Hipparionini indet.¹ Merychippus cf. insignis⁷ Leidy 1856 horse Protohippus perditus⁷ Leidy 1858 horse may include specimen of Skinner and Johnson 1984 from above quarry but in the same member: see their section 27, p. 339 Hipparionini indet.¹ Quinn 1955 hipparionine horse
Perissodactyla - Tapiridae	Tapiridae indet.⁷ Tapiridae indet.⁷ Gray 1821 tapir

¹Alroy 2002; ²Corner 1976; ³Holman and Fritz 2001; ⁴Korth 2000; ⁵Korth 2008; ⁶Olson 1991; ⁷Voorhies 1990; ⁸Wang et al. 1999