Mendevil Ranch ( of the United States)

Also known as UA loc. 12-0

Where: Cochise County, Arizona (32.0° N, 110.2° W: paleocoordinates 32.1° N, 109.6° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: St. David Formation, Blancan (4.9 - 1.8 Ma)

Environment/lithology: terrestrial

Primary reference: N. M. Johnson, N. D. Opdyke, and E. H. Lindsay. 1975. Magnetic Polarity Stratigraphy of Pliocene-Pleistocene Terrestrial Deposits and Vertebrate Faunas, San Pedro Valley, Arizona. Geological Society America Bulletin 86(1):5-12 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 19624: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• chron C2An.2n (avg age 3.17 Ma) based on paleomag
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Mammalia
 Proboscidea - Gomphotheriidae
Gomphotheriidae indet.
Gomphotheriidae indet. Hay 1922 gomphothere
 Rodentia - Cricetidae
"Bensonomys arizonae" = Calomys (Bensonomys) arizonae, "Baiomys minimus" = Peromyscus minimus, "Sigmodon medius" = Sigmodon minor, Onychomys bensoni, Neotoma fossilis, Pliophenacomys sp.
"Bensonomys arizonae" = Calomys (Bensonomys) arizonae Gidley 1922 rodent
"Baiomys minimus" = Peromyscus minimus Gidley 1922 deer mouse
"Sigmodon medius" = Sigmodon minor Gidley 1922 cotton rat
Onychomys bensoni Gidley 1922 grasshopper mouse
Neotoma fossilis Gidley 1922 pack rat
Pliophenacomys sp. Hibbard 1950 rodent
 Rodentia - Geomyidae
Nerterogeomys minor, Cratogeomys bensoni
Nerterogeomys minor Gidley 1922 pocket gopher
Cratogeomys bensoni Gidley 1922 pocket gopher
 Rodentia - Heteromyidae
Perognathinae indet., "Prodipodomys minor" = Dipodomys minor
Perognathinae indet. Coues 1875 rodent
"Prodipodomys minor" = Dipodomys minor Gidley 1922 kangaroo rat
 Lagomorpha - Leporidae
Leporidae indet., Aluralagus sp.
Leporidae indet. Fischer de Waldheim 1817 rabbit
Aluralagus sp. Downey 1968 rabbit
 Carnivora - Canidae
Canini indet.
Canini indet. Fischer de Waldheim 1817 canine
 Artiodactyla - Camelidae
Hemiauchenia sp., Camelops sp.
Hemiauchenia sp. Gervais and Ameghino 1880 camel
Camelops sp. Leidy 1854 camel
 Artiodactyla - Tayassuidae
Platygonus sp.
Platygonus sp. Leconte 1848 peccary
 Artiodactyla - Antilocapridae
Antilocapridae indet.
Antilocapridae indet. Gray 1866 pronghorn
 Perissodactyla - Equidae
Equus sp., Nannippus cf. peninsulatus
Equus sp. Linnaeus 1758 horse
Nannippus cf. peninsulatus Cope 1885 hipparionine horse