PTRM V87006, East Marmarth (Cretaceous of the United States)

Where: Slope County, North Dakota (46.3° N, 103.9° W: paleocoordinates 52.7° N, 76.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• datum -28.00, K-T section 86148

• bed-level stratigraphic resolution

Environment/lithology: "channel"; sandstone

Size classes: macrofossils, microfossils

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 45145: authorized by Matthew Carrano, entered by Matthew Carrano on 07.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
Actinopteri
 Acipenseriformes - Acipenseridae
cf. Acipenser sp. Linnaeus 1758 sturgeon
listed as cf. "Acipenser"
 Amiiformes - Amiidae
Melvius thomasi, "Kindleia fragosa" = Cyclurus fragosus
Melvius thomasi Bryant 1987 bowfin
"Kindleia fragosa" = Cyclurus fragosus Jordan 1927 bowfin
 Lepisosteiformes - Lepisosteidae
Osteichthyes
 Caudata -
Caudata indet. salamander
 Caudata - Urodela
Scapherpeton tectum Cope 1876 salamander
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Testudines -
Compsemys victa Leidy 1856 turtle
 Testudines - Baenidae
Baenidae indet. Cope 1882 turtle
Plesiobaena antiqua Lambe 1902 turtle
 Testudines - Kinosternidae
"Kinosternidae indet." = Kinosternoidea
"Kinosternidae indet." = Kinosternoidea Hay 1892 mud turtle
 Testudines - Nanhsiungchelyidae
Basilemys sinuosa Riggs 1906 turtle
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
 Testudines - Pantrionychidae
Helopanoplia distincta Hay 1908 turtle
 Testudines - Panchelydridae
 Avetheropoda - Caenagnathidae
Caenagnathidae indet. Sternberg 1940 coelurosaur
 Avetheropoda - Dromaeosauridae
Saurornitholestes sp. Sues 1978 coelurosaur
 Avetheropoda -
Paronychodon lacustris Cope 1876 coelurosaur
 Avetheropoda - Tyrannosauridae
Tyrannosaurus rex Osborn 1905 tyrant lizard king
 Neornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Neornithischia - Hadrosauridae
Hadrosaurinae indet. Lambe 1918 hadrosaurine
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii, Brachychampsa montana
"Leidyosuchus sternbergi" = Borealosuchus sternbergii Gilmore 1910 crocodilian
Brachychampsa montana Gilmore 1911 crocodilian
 Choristodera -
Champsosaurus sp. Cope 1876 choristodere