Hansen Bluff PP2 (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 20369: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Amphibia
 Salientia - Pelobatidae
"Scaphiopus bombifrons" = Spea bombifrons
"Scaphiopus bombifrons" = Spea bombifrons Cope 1863 Plains spadefoot
 Salientia - Ranidae
Rana sp. Linnaeus 1758 frog
"blairi or R. pipiens"
Rana catesbeiana Shaw 1802 American bullfrog
 Salientia - Bufonidae
Bufo sp. Laurenti 1768 toad
Bufo woodhousei Girard 1854 Woodhouse's toad
 Caudata - Urodela
Ambystoma tigrinum Green 1825 tiger salamander
Reptilia
 Squamata - Colubridae
Thamnophis sp. Fitzinger 1843 garter snake
Thamnophis elegans garter snake
Thamnophis sirtalis Linnaeus garter snake
 Squamata - Iguanidae
Sceloporus undulatus Bosc 1802 eastern fence lizard
Holbrookia maculata lesser earless lizard
Mammalia
 Perissodactyla - Equidae
Equus sp. Linnaeus 1758 horse
 Theriamorpha - Soricidae
Sorex arcticus Kerr 1792 arctic shrew
 Lagomorpha - Leporidae
Leporidae indet. Fischer de Waldheim 1817 rabbit
 Rodentia - Cricetidae
Mictomys meltoni1 Paulson 1961 bog lemming
Phenacomys sp.2 Merriam 1889 vole
Ondatra annectens Brown 1908 muskrat
"Terricola meadensis" = Microtus meadensis1 Hibbard 1944 vole
Microtus paroperarius Hibbard 1944 vole
 Rodentia - Sciuridae
"Spermophilus lateralis" = Callospermophilus lateralis, "Spermophilus richardsonii" = Urocitellus richardsonii
"Spermophilus lateralis" = Callospermophilus lateralis Say 1823 golden-mantled ground squirrel
"Spermophilus richardsonii" = Urocitellus richardsonii Sabine 1822 Holarctic ground squirrel
 Rodentia - Geomyidae
Geomys sp. Rafinesque 1817 pocket gopher