Cow Creek Site 1 (Cretaceous of the United States)

Also known as UCMP V-5621

Where: Niobrara County, Wyoming (43.3° N, 104.7° W: paleocoordinates 49.7° N, 79.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Lance Formation, Lancian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone

• "cross-stratified sandstone"

Size class: mesofossils

Collected by W. A. Clemens; reposited in the UCMP

Primary reference: W. A. Clemens. 1964. Fossil mammals of the type Lance Formation, Wyoming. Part I. Introduction and Marsupialia. University of California Publications in Geological Sciences 48:1-105 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14522: authorized by John Alroy, entered by John Alroy on 26.07.1994, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

 Architaenioglossa - Viviparidae
cf. Viviparus sp.4 Montfort 1810 snail
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus4 Cope 1876 whiptail stingray
 Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis4 Leidy 1856 gar
 Caudata - Urodela
Habrosaurus dilatus4 Gilmore 1928 siren
Reptilia indet.3 Laurenti 1768 reptile
 Testudines - Trionychidae
Trionychidae indet.3 Gray 1825 softshell turtle
Including UCMP 173446 listed by Horoyd & Hutchison 2002
 Avetheropoda -
cf. Dryptosaurus sp.4 Marsh 1877 coelurosaur
 Leptictida - Gypsonictopidae
Gypsonictops hypoconus2 Simpson 1927 eutherian
 Didelphimorphia - Glasbiidae
Glasbius intricatus1 Clemens 1966 marsupial
 Didelphimorphia - Stagodontidae
Didelphodon vorax1 Marsh 1889 marsupial
 Multituberculata - Neoplagiaulacidae
Mesodma sp. Jepsen 1940 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate