Hansen Bluff CT3 (Pleistocene of the United States)

Also known as Alamosa

Where: Alamosa County, Colorado (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 20361: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Amphibia
 Salientia - Ranidae
Rana sp., Rana catesbeiana
Rana sp. Linnaeus 1758 frog
"blairi or R. pipiens"
Rana catesbeiana Shaw 1802 American bullfrog
 Salientia - Bufonidae
Bufo sp., Bufo cognatus, Bufo woodhousei
Bufo sp. Laurenti 1768 toad
Bufo woodhousei Girard 1854 Woodhouse's toad
 Salientia - Hylidae
Pseudacris triseriata
Pseudacris triseriata Wied 1838 western chorus frog
 Salientia - Pelobatidae
"Scaphiopus bombifrons" = Spea bombifrons
"Scaphiopus bombifrons" = Spea bombifrons Cope 1863 Plains spadefoot
 Caudata - Urodela
"Ambystoma alamosensis n. sp." = Amblystoma2, Ambystoma tigrinum
"Ambystoma alamosensis n. sp." = Amblystoma2 mole salamander
Ambystoma tigrinum Green 1825 tiger salamander
Mammalia
 Rodentia - Geomyidae
Geomys sp.
Geomys sp. Rafinesque 1817 pocket gopher
 Rodentia - Cricetidae
Reithrodontomys sp., Microtus paroperarius, "Terricola meadensis" = Microtus meadensis1
Reithrodontomys sp. Giglioli 1874 harvest mouse
Microtus paroperarius Hibbard 1944 vole
"Terricola meadensis" = Microtus meadensis1 Hibbard 1944 vole
 Rodentia - Sciuridae
Spermophilus tridecemlineatus
Spermophilus tridecemlineatus Mitchell 1821 thirteen-lined ground squirrel
 Lagomorpha - Leporidae
Leporidae indet.
Leporidae indet. Fischer de Waldheim 1817 rabbit
Reptilia
 Squamata - Colubridae
Thamnophis sp., Thamnophis elegans, Thamnophis sirtalis, Heterodon nasicus
Thamnophis sp. Fitzinger 1843 garter snake
Thamnophis elegans garter snake
Thamnophis sirtalis Linnaeus garter snake
Heterodon nasicus Baird and Girard 1852 western hognose snake
 Squamata - Crotalidae
Crotalus viridis
Crotalus viridis Rafinesque 1818 prairie rattlesnake
 Squamata - Iguanidae
Holbrookia maculata, Sceloporus undulatus
Holbrookia maculata lesser earless lizard
Sceloporus undulatus Bosc 1802 eastern fence lizard
1Alroy 2002; 2Rogers 1987