Gadsden County, Florida paleontological sites

The Gadsden County paleontological sites are assemblages of Early Miocene invertebrates and vertebrates occurring in Gadsden County, Florida, United States.

Age

Era: Neogene
Period: Early Miocene
Faunal stage: Hemingfordian ~20.6—16.3 Mya, calculates to a period of approximately 4.3 million years
Geologic formation: Torreya Formation

Sites

Gadsden County paleontological sites are represented by the following:
La Camelia Site. Time period: 17.7 Mya. (AEO)
Midway Site. Time period: ~18.9—18.8 Mya.
Milwhite Gunn Farm Site. Time period: ~17.0 Mya. (AEO)
Quincy Site. Time period: ~17.0 Mya. (AEO)
Coordinates:

Genus and species identified

La Camelia site = LCS. Midway site. = MIS. Milwhite Gunn Farfm Site. Marks River site = MGFD. Quincy site = QUI.

Reptiles and amphibians

• Batrachosauroides B. dissimulans. (Amphibian). MGFD.
• Colubrinae (Snake). MGFD.
• Natricinae (Snake). MGFD.
• Scincidae (Skink). MGFD.
• Cnemidophorus (Racerunner lizard). MGFD.
• Heloderma (Gila monster type poisonous lizard). LCS.
• Leiocephalus (Lizard). MGFD.

Mammals

Carnivores

• Amphicyon pontoni (Bear-dog). MIS.
• Borophaginae (Proto-dog). MIS.
• Procyon (Racoon). MIS.

Herbivores

• Acritohippus isonesus (Horse). LCS.
• Anchitherium clarencei. MIS.
• Aphelops (Rhinoceros). LCS, MIS, MGFD.
• Archaeohippus blackbergi
• Blastomeryx (Deer-like). MIS.
• Bouromeryx americanus (Proto-horse). LCS.
• Harrymys magnus (Kangaroo rat. MIS.
• Lantanotherium (Gymnure). MGFD.
• Copemys (Hamster-like rodents). MGFD.
• Metaxytherium crataegense (Sea cow). LCS, MGFD.
• Merychippus gunteri (Horse). LCS, MGFD, QUI.
• Merychippus primus (Horse). LCS, MGFD.
• Mylagaulus (Horned rodent). MIS, MGFD.
• Nanosiren (Sea cow). MIS.
• Merycoidodontidae (Horse). MIS.
• Perognathus minutus (Mouse). MGFD.
• Proheteromys floridanus (Kangaroo rat). MIS, MGFD.
• Prosynthetoceras texanus (Deer-like). MIS.
• Prosthennops xiphodonticus. (Deer-like). LCS.
• Rakomeryx (Horse). LCS.

References

• Bryant, J. D., Journal of Vertebrate Paleontology 11(4). 1991
• Simpson, G. G., 1932. Bulletin of the Florida State Geological Survey 10.
• New Early Barstovian (Middle Miocene) Vertebrates from the Upper Torreya Formation, Eastern Florida Panhandle, J. Daniel Bryant, Journal of Vertebrate Paleontology, Vol. 11, No. 4 (Dec. 31, 1991), pp. 472–489.
• Paleobiology Database : Gunn Farm Collection, John Alroy.
• Paleobiology Datatabase: Midway Collection, Alroy.
• Olson, Stanley J., Florida Geological Survey,Fossil Mammals of Florida, 1959 [1].