Premolar Site (Cretaceous of the United States)

Also known as UCMP V-5625

Where: Niobrara County, Wyoming (43.2° N, 104.5° W: paleocoordinates 49.7° N, 79.3° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

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

Environment/lithology: terrestrial

Size class: mesofossils

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 14609: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus3 Cope 1876 whiptail stingray
Actinopteri
 Amiiformes - Amiidae
"Kindleia fragosa" = Cyclurus fragosus3
"Kindleia fragosa" = Cyclurus fragosus3 Jordan 1927 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis3 Leidy 1856 gar
Reptilia
 Avetheropoda - Dromaeosauridae
Dromaeosauridae indet.2 Colbert and Russell 1969 coelurosaur
 Avetheropoda - Ornithomimidae
cf. Ornithomimus sp.3 Marsh 1890 ornithomimid
 Neornithischia - Ceratopsidae
cf. Triceratops sp.3 Marsh 1889 ceratopsid
 Neornithischia - Hadrosauridae
"cf. Anatosaurus sp." = Edmontosaurus3
"cf. Anatosaurus sp." = Edmontosaurus3 Lambe 1917 hadrosaurine
 Crocodylia - Crocodylidae
Crocodylidae indet.2 Cuvier 1807 crocodile
Mammalia
 Leptictida - Gypsonictopidae
Gypsonictops hypoconus2 Simpson 1927 eutherian
 Didelphimorphia - Stagodontidae
Didelphodon vorax1 Marsh 1889 marsupial