Flat Creek 1 (Cretaceous of the United States)

Also known as UCMP V-73083

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• coordinate based on unpublished field data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 14546: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• lower level of Flat Creek section
Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus3 Cope 1876 whiptail stingray
Actinopteri
 Amiiformes - Amiidae
Amia fragosa3 Jordan 1927 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis3 Leidy 1856 gar
Osteichthyes
 Proteida - Batrachosauroididae
Opisthotriton kayi3 Auffenberg 1961 salamander
 Caudata - Urodela
Scapherpeton tectum3 Cope 1876 salamander
Reptilia
 Testudines -
Cryptodira indet.3 Cope 1868 turtle
 Sauria -
Sauria indet.3 diapsid
 Theropoda -
 Avetheropoda - Dromaeosauridae
Richardoestesia isosceles3 Sankey 2001 coelurosaur
Saurornitholestinae indet.4 Longrich and Currie 2009 coelurosaur
UCMP 120305
 Avetheropoda - Coeluridae
Coeluridae indet.3 Marsh 1881 coelurid
 Neornithischia - Ceratopsidae
Ceratopsidae indet.3 Marsh 1888 ceratopsid
 Neornithischia - Hypsilophodontidae
Hypsilophodontidae indet.3 Dollo 1882 hypsilophodontid
 Neornithischia - Hadrosauridae
"Anatosaurus sp." = Edmontosaurus3
"Anatosaurus sp." = Edmontosaurus3 Lambe 1917 hadrosaurine
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii3
"Leidyosuchus sternbergi" = Borealosuchus sternbergii3 Gilmore 1910 crocodilian
 Crocodylia - Alligatoridae
Brachychampsa montana3 Gilmore 1911 crocodilian
Mammalia
 Didelphimorphia - Alphadontidae
Alphadon sp.1 Simpson 1927 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus robustus Marsh 1889 multituberculate
Essonodon browni Simpson 1927 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate