111 Ranch (Middle) ( of the United States)

Where: Graham County, Arizona (33.0° N, 109.6° W: paleocoordinates 33.1° N, 109.0° W)

• coordinate based on political unit

When: Blancan (4.9 - 1.8 Ma)

Environment/lithology: terrestrial

Primary reference: T. Galusha, N. M. Johnson, E. H. Lindsay, N. D. Opdyke, and R. H. Tedford. 1984. Biostratigraphy and magnetostratigraphy, late Pliocene rocks, 111 Ranch, Arizona. Geological Society America Bulletin 95(6):714-722 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 19657: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• from Mt. Blanco Ash Bed interval, 30-40 m/98-130 ft. in local section; this includes the ash bed dated at 2.32 +/- 0.15 Ma (FT on zircon) and 2.43 +/- 0.38 Ma (FT on glass); both of these dates appear to be too young based on the paleomag
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Mammalia
 Proboscidea - Gomphotheriidae
Gomphotheriidae indet.1, Rhynchotherium sp.
Gomphotheriidae indet.1 Hay 1922 gomphothere
Rhynchotherium sp. Falconer 1868 gomphothere
 Rodentia - Cricetidae
"Bensonomys arizonae" = Calomys (Bensonomys) arizonae2, "Sigmodon medius" = Sigmodon minor, Neotoma sp.
"Bensonomys arizonae" = Calomys (Bensonomys) arizonae2 Gidley 1922 rodent
"Sigmodon medius" = Sigmodon minor Gidley 1922 cotton rat
Neotoma sp. Say and Ord 1825 pack rat
 Rodentia - Sciuridae
Spermophilus sp.
Spermophilus sp. Cuvier 1825 ground squirrel
 Rodentia - Hydrochoeridae
"Neochoerus dichroplax" = Phugatherium dichroplax1
"Neochoerus dichroplax" = Phugatherium dichroplax1 Ahearn and Lance 1980 caviomorph
 Rodentia - Geomyidae
Geomys sp.
Geomys sp. Rafinesque 1817 pocket gopher
 Lagomorpha - Leporidae
Archaeolaginae indet.1
 Carnivora - Canidae
Borophagus sp., Canis cf. latrans1
Borophagus sp. Cope 1892 bone-crushing dog
Canis cf. latrans1 Say 1823 coyote
 Carnivora - Felidae
? Homotherium sp.
? Homotherium sp. Fabrini 1890 cat
 Artiodactyla - Camelidae
"Camelops cf. traviswhitei" = Camelops hesternus
"Camelops cf. traviswhitei" = Camelops hesternus Leidy 1873 camel
 Artiodactyla - Tayassuidae
Platygonus sp.
Platygonus sp. Leconte 1848 peccary
 Artiodactyla - Antilocapridae
Capromeryx arizonensis
Capromeryx arizonensis Skinner 1942 pronghorn
possibly includes type of Skinner 1942 from Dry Mountain
 Perissodactyla - Equidae
"Equus simplicidens" = Plesippus simplicidens, "Equus cf. scotti" = Equus mexicanus, Nannippus peninsulatus
"Equus simplicidens" = Plesippus simplicidens Cope 1892 horse
"Equus cf. scotti" = Equus mexicanus Hibbard 1955 horse
Nannippus peninsulatus Cope 1885 hipparionine horse
 Cingulata - Glyptodontidae
Glyptotherium texanum
Glyptotherium texanum Osborn 1903 glyptodon
 Megatherioidea - Megalonychidae
Megalonyx sp.
Megalonyx sp. Harlan 1825 edentate
1Alroy 2002; 2Tomida 1987