East Surface Quarry: Early/Lower Barstovian, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Globidonta indet. Brochu 1999
Whiting and Head 2020
UNSM 135035
Reptilia - Testudines - Chelydridae
Chelydrops stricta n. sp. Matthew 1924
recombined as Macrochelys stricta
Matthew 1924: testudinid
Mammalia - Carnivora - Amphicyonidae
Pliocyon medius n. sp. Matthew 1918
Amphicyon sinapius Matthew 1902
    = Cynelos sinapius Matthew 1902
Alroy 2002
Mammalia - Carnivora - Mustelidae
Mionictis incertus n. sp. Matthew 1924
Mammalia - Carnivora - Procyonidae
Bassariscus antiquus Matthew and Cook 1909
Baskin 2004
F:AM 25251 from "Quarry 2": I assume this means Sinclair Quarry No. 2,but it could also be East Surface Quarry or Trojan Quarry
Mammalia - Carnivora - Canidae
Microtomarctus conferta (Matthew 1918)
Wang et al. 1999
"Quarry A"
Tomarctus hippophaga (Matthew and Cook 1909)
Wang et al. 1999
"Quarry A"
Tomarctus brevirostris Cope 1873
Wang et al. 1999
"Quarry A"
Mammalia - Perissodactyla - Equidae
Hypohippus pertinax Matthew 1918
    = Hypohippus osborni Gidley 1907
Alroy 2002
Scaphohippus intermontanus (Merriam 1915)
Mihlbachler et al. 2011
Supplemental Table S1: "Quarry 2"
Neohipparion sp. Gidley 1903
Mihlbachler et al. 2011
Supplemental Table S1
Acritohippus isonesus (Cope 1889)
Mihlbachler et al. 2011
Supplemental Table S1
Merychippus insignis Leidy 1856
Mihlbachler et al. 2011
Supplemental Table S1: "Quarry 2"
Mammalia - Perissodactyla - Rhinocerotidae
Teleoceras medicornutum Osborn 1904
Prothero 2005
"Quarry #2, East Sinclair Draw"
Aphelops megalodus (Cope 1873)
Prothero 2005
Mammalia - Camelidae
Aepycamelus procerus n. sp. (Matthew and Cook 1909)
"Thomson [MS.a] gave the locality as "Quarry 2,..."; "There is no doubt that the type of A. procerus is from the Olcott Formation."
Mammalia - Merycoidodontidae
Ticholeptus hypsodus Loomis 1924
    = Ticholeptus zygomaticus Cope 1878
Alroy 2002
Mammalia - Antilocapridae
Merycodus sabulonis (Matthew and Cook 1909)
recombined as Cosoryx (Paracosoryx) sabulonis
"Cosoryx (Paracosoryx) sp." Frick 1937: dentitions compared to both M. sabulonis and "C. savaronis"; from "Quarry A, Sinclair Draw"
Mammalia - Palaeomerycidae
Dromomeryx whitfordi Sinclair 1915
Frick 1937
synonym of Dromomeryx borealis
"Quarry A"
Mammalia - Rodentia - Castoridae
Amblycastor fluminus
    = Anchitheriomys fluminis Matthew 1918
Alroy 2002
(sic): described by Stirton 1935
see common names

Geography
Country:United States State/province:Nebraska County:Sioux
Coordinates: 42.4° North, 103.8° West (view map)
Paleocoordinates:43.0° North, 100.6° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
*Period:Tertiary
Key time interval:Early/Lower Barstovian
Age range of interval:15.97000 - 13.60000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Olcott Member:subcycle 3
Local section:Snake Local bed:5
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Lower Snake Creek Beds; Barstovian 1
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Museum repositories:UNSM
Taxonomic list comments:exactly equivalent to "Quarry A"
Metadata
Also known as:Quarry A; Quarry 2; Sinclair Q. No. 2; Sinclair Quarry 2
Database number:17904
Authorizer:J. Alroy, J. Marcot, P. Mannion Enterer:J. Alroy, P. Mannion, J. Marcot
Modifier:G. Varnham Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2022-04-27 08:16:23
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

3175. M. F. Skinner, S. M. Skinner, and R. J. Gooris. 1977. Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska. Bulletin of the American Museum of Natural History 158(5):263-370 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
40876 J. A. Baskin. 2004. Bassariscus and Probassariscus (Mammalia, Carnivora, Procyonidae) from the early Barstovian (Middle Miocene). Journal of Vertebrate Paleontology 24(3):709-720 [J. Alroy/J. Alroy]
6222 C. Frick. 1937. Horned ruminants of North America. Bulletin of the American Museum of Natural History 69:1-669 [J. Alroy/J. Alroy/M. Uhen]
61275 M. C. Mihlbachler, F. Rivals, N. Solounias and G. M. Semprebon. 2011. Dietary Change and Evolution of Horses in North America. Science 331:1178-1181 [J. Marcot/J. Marcot]
51726 D. R. Prothero. 2005. The Evolution of North American Rhinoceroses. 1-218 [J. Marcot/J. Marcot]
3558 X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy]
72834 E. T. Whiting and J. J. Head. 2020. Neogene crocodylians from the Central Great Plains: spatiotemporal histories and relationships with regional climatic and environmental changes. Journal of Vertebrate Paleontology 40(1):e1764007:1-14 [P. Mannion/P. Mannion/P. Mannion]