Syndyoceras Quarry ( of the United States)

Also known as Syndyoceras Hill

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.3° N, 98.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Harrison Formation, Harrisonian (24.8 - 20.4 Ma)

Environment/lithology: terrestrial

Primary reference: M. S. Stevens. 1991. Osteology, Systematics, and Relationships of Earliest Miocene Mesocyon venator (Carnivora: Canidae). Journal of Vertebrate Paleontology 11(1):45-66 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17846: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• Harrison Fm. sensu stricto: Hunt 1985a
see Patton and Taylor 1971 for precise locality data
Mammalia
 Perissodactyla - Rhinocerotidae
Diceratherium niobrarense1 Peterson 1906 rhinoceros
 Carnivora - Amphicyonidae
"Temnocyon" percussor n. sp.3 Cook 1909 bear-dog
from "1/2 mi W of Agate"
 Carnivora - Canidae
Leptocyon cf. gregorii1 Matthew 1907 canine
Desmocyon thomsoni1 Matthew 1907 bone-crushing dog
Phlaocyon minor1 Matthew 1907 bone-crushing dog
Cynarctoides acridens6 Barbour and Cook 1914 bone-crushing dog
"First hill south of Synyoceras Hill, 0.5 mi west of Agate, Harrison Formation"
 Carnivora -
? Palaeogale sp.2 von Meyer 1846 carnivoran
 Ungulata - Protoceratidae
Syndyoceras cooki n. sp.5 Barbour 1905 protoceratid
see also Frick 1937
 Ungulata - Hypertragulidae
Nanotragulus ordinatus1 Matthew 1907 ruminant
 Ungulata - Leptomerycidae
Leptomerycidae indet.4 Zittel 1893 ruminant