Swift Mine (Neogene of the United States)

Where: Polk County, Florida (27.9° N, 81.8° W: paleocoordinates 28.1° N, 80.1° W)

• coordinate based on political unit

When: Bone Valley Member (Peace River Formation), Late/Upper Hemphillian (10.3 - 4.9 Ma)

• Latest Hemphillian, Palmetto Fauna; Morgan (1994) lists the age as latest Hemphillian (Zanclean, early Pliocene); upper beds

•JA: changed to Zanclean by Pyenson (?), but the primary temporal information is the "Hemphillian" age assignment and the AEO data are inconsistent with a Pliocene age

Environment/lithology: terrestrial; carbonate

Size class: macrofossils

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18595: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Nick Pyenson

Creative Commons license: CC BY (attribution)

Taxonomic list

• C. cerasinus reported by Hulbert 1988a: site may be diachronous
Mammalia
 Perissodactyla - Equidae
Dinohippus mexicanus3 Lance 1950 horse
Astrohippus stockii3 Lance 1950 horse
 Artiodactyla - Tayassuidae
"Catagonus brachydontus" = Protherohyus brachydontus6
"Catagonus brachydontus" = Protherohyus brachydontus6 Dalquest and Mooser 1980 peccary
 Artiodactyla - Antilocapridae
Sphenophalos garciae1 Webb 1973 pronghorn
Hexameryx simpsoni5 White 1941 pronghorn
 Carnivora - Odobenidae
"Trichecodon huxleyi" = Ontocetus emmonsi4
"Trichecodon huxleyi" = Ontocetus emmonsi4 Leidy 1859 walrus
 Carnivora - Canidae
Borophagus hilli Johnston 1939 bone-crushing dog
Reptilia
 Testudines -
"Chelonia sp." = Testudines2
"Chelonia sp." = Testudines2 Batsch 1788 turtle