PTRM V95020, Cannonball Creek (Cretaceous of the United States)

Where: Slope County, North Dakota (46.5° N, 104.0° W: paleocoordinates 52.7° N, 77.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hell Creek Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• datum -5.50, K-T section 9653

• bed-level stratigraphic resolution

Environment/lithology: "channel"; silty mudstone

Size classes: macrofossils, mesofossils

Primary reference: D. A. Pearson, T. Schaefer, K. R. Johnson, D. J. Nichols, and J. P. Hunter. 2002. Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota. In J. H. Hartman, J. R. Johnson, and D. J. Nichols (eds.), The Hell Creek Formation and the Cretaceous-Tertiary Boundary in the Northern Great Plains: An Integrated Continental Record of the End of the Cretaceous, Geological Society of America Special Paper 361:145-167 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 45143: authorized by Matthew Carrano, entered by Matthew Carrano on 07.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Ornithischia - Hadrosauridae
Hadrosaurinae indet. Lambe 1918 hadrosaurine
 Loricata -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii
"Leidyosuchus sternbergi" = Borealosuchus sternbergii Gilmore 1910 crocodilian
 Crocodylia - Alligatoridae
Brachychampsa montana Gilmore 1911 crocodilian
 Testudinata -
Compsemys victa Leidy 1856 turtle
 Testudines - Chelydridae
Chelydridae indet. Swainson 1839 turtle
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
Amphibia
 Caudata -
Caudata indet. salamander
Actinopteri
 Lepisosteiformes - Lepisosteidae
 Amiiformes - Amiidae
"Kindleia fragosa" = Cyclurus fragosus, Melvius thomasi
"Kindleia fragosa" = Cyclurus fragosus Jordan 1927 bowfin
Melvius thomasi Bryant 1987 bowfin
 Aspidorhynchiformes - Aspidorhynchidae
Chondrichthyes
 Hybodontiformes - Lonchidiidae
"Lissodus selachos" = Lonchidion selachos
"Lissodus selachos" = Lonchidion selachos Estes 1964 elasmobranch