Nern-Baker (Cretaceous of the United States)

Also known as UCMP V-5619

Where: Niobrara County, Wyoming (43.8° N, 104.6° W: paleocoordinates 50.3° N, 79.2° 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

• "a cross-stratified sandstone"

Size class: mesofossils

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

Collection methods: anthill,

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 14598: authorized by John Alroy, entered by John Alroy on 26.07.1994, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Lonchidiidae
Lonchidion selachos5 Estes 1964 elasmobranch
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus6 Cope 1876 whiptail stingray
Gnathostomata
  -
Actinopteri
 Amiiformes - Amiidae
Amiidae indet.5 Huxley 1861 bowfin
Amia uintaensis5 Leidy 1873 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.5 Agassiz 1843 gar
Osteichthyes
 Proteida - Batrachosauroididae
Prodesmodon copei5 Estes 1964 salamander
 Caudata - Urodela
Urodela indet.5 salamander
Reptilia
  -
Reptilia indet.5 Laurenti 1768 reptile
 Testudines -
? Cryptodira indet.5 Cope 1868 turtle
 Archosauria -
 Crocodylia - Crocodylidae
Crocodylidae indet.5 Cuvier 1807 crocodile
 Squamata - Chamopsiidae
Chamops segnis5 Marsh 1892 lizard
Mammalia
 Cimolesta - Cimolestidae
Cimolestes incisus4 Marsh 1889 eutherian
Cimolestes stirtoni4 Clemens 1973 eutherian
 Leptictida - Gypsonictopidae
Gypsonictops hypoconus4 Simpson 1927 eutherian
 Creodonta -
"Cimolestes magnus" = Altacreodus magnus4
"Cimolestes magnus" = Altacreodus magnus4 Clemens and Russell 1965 creodont
 Theriiformes - Peradectidae
Pediomys elegans3, "Pediomys hatcheri" = Aletridelphys hatcheri3, "Pediomys cooki" = Leptalestes cooki3
Pediomys elegans3 Marsh 1889 metatherian
"Pediomys hatcheri" = Aletridelphys hatcheri3 Osborn 1898 metatherian
"Pediomys cooki" = Leptalestes cooki3 Clemens 1966 metatherian
 Theriiformes - Herpetotheriidae
Nortedelphys magnus2 Case et al. 2004 marsupial
 Didelphimorphia - Alphadontidae
Alphadon marshi3 Simpson 1927 marsupial
 Didelphimorphia - Stagodontidae
Didelphodon vorax3 Marsh 1889 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus robustus Marsh 1889 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma sp.1 Jepsen 1940 multituberculate
Mesodma thompsoni Clemens 1964 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate
Amphibia
  -
Amphibia indet.5 tetrapod