Hansen Bluff CT2 (Pleistocene of the United States)

Also known as Alamosa

Where: Alamosa County, Colorado (37.4° N, 105.8° W: paleocoordinates 37.4° N, 105.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Alamosa Formation, Middle Pleistocene (0.8 - 0.1 Ma)

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; sandstone

• "in stream channels or in small, lake-filled relict channels"

Size class: mesofossils

Collection methods: bulk, sieve,

Primary reference: K. L. Rogers, C. A. Repenning, R. M. Forester, E. E. Larson, S. A. Hall, G. R. Smith, E. Anderson and T. J. Brown. 1985. Middle Pleistocene (late Irvingtonian: Nebraskan) climatic changes in south-central Colorado. National Geograpic Research 1(4):535-563 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 20360: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Lagomorpha - Leporidae
Leporidae indet. Fischer de Waldheim 1817 rabbit
 Rodentia - Cricetidae
Microtus paroperarius, "Terricola meadensis" = Microtus meadensis1
Microtus paroperarius Hibbard 1944 vole
"Terricola meadensis" = Microtus meadensis1 Hibbard 1944 vole
 Rodentia - Geomyidae
Geomys sp. Rafinesque 1817 pocket gopher
 Rodentia - Heteromyidae
Dipodomys ordii Woodhouse 1853 Ord's kangaroo rat
 Carnivora - Canidae
Canis sp.1 Linnaeus 1758 canine
 Perissodactyla - Equidae
"Equus cf. scotti" = Equus mexicanus
"Equus cf. scotti" = Equus mexicanus Hibbard 1955 horse
 Theriamorpha - Soricidae
"Sorex hoyi" = Microsorex hoyi1
"Sorex hoyi" = Microsorex hoyi1 Baird 1858 American pygmy shrew
Reptilia
 Squamata - Colubridae
Thamnophis sp. Fitzinger 1843 garter snake
Heterodon nasicus Baird and Girard 1852 western hognose snake
 Squamata - Iguanidae
Sceloporus undulatus Bosc 1802 eastern fence lizard
Amphibia
 Caudata - Urodela
"Ambystoma alamosensis" = Amblystoma2, Ambystoma tigrinum
"Ambystoma alamosensis" = Amblystoma2 mole salamander
Ambystoma tigrinum Green 1825 tiger salamander
 Salientia - Pelobatidae
"Scaphiopus bombifrons" = Spea bombifrons
"Scaphiopus bombifrons" = Spea bombifrons Cope 1863 Plains spadefoot
 Salientia - Bufonidae
Bufo sp. Laurenti 1768 toad
Bufo woodhousei Girard 1854 Woodhouse's toad
 Salientia - Ranidae
Rana sp. Linnaeus 1758 frog
"blairi or R. pipiens"
Rana catesbeiana Shaw 1802 American bullfrog