Gunn Farm Mine (Miocene of the United States)

Also known as Milwhite Gunn Farm Mine; Willacoochee Creek (in part)

Where: Gadsen County, Florida (30.5° N, 84.5° W: paleocoordinates 30.8° N, 81.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Dogtown Member (Torreya Formation), Early/Lower Barstovian (16.3 - 12.5 Ma)

• most material is from a single bed

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; lithified, calcareous sandstone

• "well indurated, carbonate-cemented sandstone"

Size classes: macrofossils, mesofossils

Collection methods: bulk, sieve,

Primary reference: J. D. Bryant. 1991. New early Barstovian (middle Miocene) vertebrates from the upper Torreya Formation, eastern Florida panhandle. Journal of Vertebrate Paleontology 11(4):472-489 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 18538: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Patricia Holroyd and Gustavo Ballen

Creative Commons license: CC BY (attribution)

Taxonomic list

• overlying horizon dated at 14.7 and 14.9 +/- 1.0 Ma (Sr isotope ratio); samples are not considered to be diagenetically altered: Bryant et al. 1992
Show authors, comments, and common names
Mammalia
 Tribosphenida - Erinaceidae
Lanthanotherium sp.
Lanthanotherium sp. Filhol 1888 hedgehog
 Perissodactyla - Equidae
"Merychippus" primus, "Merychippus" gunteri
"Merychippus" primus Osborn 1918 horse
"Merychippus" gunteri Simpson 1930 horse
 Perissodactyla - Rhinocerotidae
? Aphelops sp.
? Aphelops sp. Owen 1845 rhinoceros
 Rodentia - Mylagaulidae
Mylagaulidae indet.1
Mylagaulidae indet.1 Cope 1881 rodent
 Rodentia - Cricetidae
Copemys sp.
Copemys sp. Wood 1936 rodent
 Rodentia -
Geomyoidea indet.1
Geomyoidea indet.1 Bonaparte 1845 rodent
 Rodentia - Heteromyidae
Perognathus cf. minutus
Perognathus cf. minutus James 1963 pocket mouse
 Sirenia - Dugongidae
""Hesperosiren" crataegensis" = Metaxytherium crataegense
""Hesperosiren" crataegensis" = Metaxytherium crataegense Simpson 1932 dugong
Reptilia
 Squamata - Teiidae
? Cnemidophorus sp.
? Cnemidophorus sp. Wagler 1830 whiptail lizard
 Squamata - Scincidae
Scincidae indet.
Scincidae indet. Gray 1825 skink
 Squamata - Colubridae
Colubrinae indet., Natricinae indet.
Colubrinae indet. Oppel 1811 colubrid snake
two forms
Natricinae indet. Bonaparte 1838 colubrid snake
 Squamata - Iguanidae
? Leiocephalus sp.
? Leiocephalus sp. Gray 1827 curly-tailed lizard
 Testudines - Testudinidae
Testudinidae indet.3
Testudinidae indet.3 Batsch 1788 turtle
2 species, one large, one small
 Testudines - Emydidae
Emydidae indet.3
Emydidae indet.3 Rafinesque 1815 turtle
 Testudines - Kinosternidae
"Kinosternidae indet." = Kinosternoidea3
"Kinosternidae indet." = Kinosternoidea3 Hay 1892 mud turtle
 Testudines - Trionychidae
? Apalone sp.3
? Apalone sp.3 Rafinesque 1832 softshell turtle
 Testudines - Podocnemididae
Podocnemididae indet.4
Podocnemididae indet.4 Cope 1868 sideneck turtle
Amphibia
 Proteida - Batrachosauroididae
Batrachosauroides dissimulans
Batrachosauroides dissimulans Taylor and Hesse 1943 salamander
Actinopteri
 Istiophoriformes - Sphyraenidae
Sphyraena sp.2
Sphyraena sp.2 Artedi 1793 barracuda
UF 111768 (11 teeth)
1Alroy 2002; 2Ballen 2020; 3Bourque 2013; 4Bourque 2016