Also known as Benson sensu stricto; UA loc. 47-0
Where: Cochise County, Arizona (32.0° N, 110.3° W: paleocoordinates 32.1° N, 109.7° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: St. David Formation, Blancan (4.9 - 1.8 Ma)
• "Sigmodon medius datum" of Johnson et al. 1975
•dated at 3.1 +/- 0.7 Ma (FT on zircon) and in combination with paleomag firmly tied to chron C2An.3n, avg age 3.44 Ma: see Johnson et al. 1975
Environment/lithology: lacustrine
Reposited in the USNM
Primary reference: C. L. Gazin. 1942. The Late Cenozoic vertebrate faunas from the San Pedro Valley, Ariz. Proceedings of the United States National Museum 92:475-518 [J. Alroy/J. Alroy/L. van den Hoek Ostende]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 19628: authorized by John Alroy, entered by John Alroy on 18.02.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
Amphibia | |
| |
| |
Reptilia | |
| |
Kinosternon arizonense n. sp.2
| |
Mammalia | |
Gomphotheriidae indet. Hay 1922 gomphothere "mastodont"; "cf. Cuvieronius sp." of Johnson et al. 1975
| |
? Mustelidae indet. Fischer 1817 mustelid carnivore | |
cf. Borophagus sp.4 Cope 1892 bone-crushing dog presumably "Canidae indet."; may include B. diversidens of Wang et al. 1999 from "Three and one-half mi section... near Benson"
| |
| |
| |
| |
Platygonus sp. Leconte 1848 peccary | |
| |
| |
Leporidae indet. Fischer de Waldheim 1817 rabbit | |
"Bensonomys arizonae" = Calomys (Bensonomys) arizonae1, Onychomys bensoni, "Baiomys minimus" = Peromyscus minimus, Neotoma fossilis, "Sigmodon medius" = Sigmodon minor
Onychomys bensoni Gidley 1922 grasshopper mouse
"Baiomys minimus" = Peromyscus minimus Gidley 1922 deer mouse
Neotoma fossilis Gidley 1922 pack rat
"Sigmodon medius" = Sigmodon minor Gidley 1922 cotton rat | |
"Spermophilus bensoni" = Citellus (Otospermophilus) bensoni1
| |
Cratogeomys bensoni Gidley 1922 pocket gopher
Nerterogeomys minor Gidley 1922 pocket gopher | |
"? Prodipodomys minor" = Dipodomys minor Gidley 1922 kangaroo rat |