Flat Creek 3 (Cretaceous of the United States)

Also known as UCMP V-73085

Where: Garfield County, Montana (47.5° N, 106.4° W: paleocoordinates 54.2° N, 79.5° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Hell Creek Formation, Lancian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; silty sandstone

Size class: mesofossils

Reposited in the UCMP

Collection methods: bulk, surface (float), sieve,

Primary reference: J. D. Archibald. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. University of California Publications in Geological Sciences 122:1-286 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14548: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• upper level of Flat Creek section
Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus2 Cope 1876 whiptail stingray
 Orectolobiformes - Orectolobidae
Squatirhina americana2 Estes 1964 wobbegong
Actinopteri
 Acipenseriformes - Acipenseridae
Acipenser sp.2 Linnaeus 1758 sturgeon
 Amiiformes - Amiidae
Melvius thomasi2 Bryant 1987 bowfin
Amia sp.2 Linnaeus 1766 bowfin
Amia fragosa2 Jordan 1927 bowfin
Amia uintaensis2 Leidy 1873 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis2 Leidy 1856 gar
Osteichthyes
 Caudata - Urodela
Scapherpeton tectum2 Cope 1876 salamander
Reptilia
 Avetheropoda - Caenagnathidae
Chirostenotes sp.2 Gilmore 1924 coelurosaur
 Avetheropoda - Dromaeosauridae
Richardoestesia cf. gilmorei3 Currie et al. 1990 coelurosaur
UCMP 120338
Saurornitholestinae indet.3 Longrich and Currie 2009 coelurosaur
UCMP 120339
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii2
"Leidyosuchus sternbergi" = Borealosuchus sternbergii2 Gilmore 1910 crocodilian
 Crocodylia - Alligatoridae
Brachychampsa montana2 Gilmore 1911 crocodilian
 Choristodera -
Champsosaurus sp.2 Cope 1876 choristodere
Mammalia
 Didelphimorphia - Alphadontidae
Alphadon sp.1 Simpson 1927 marsupial
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate