Where: Morton County, North Dakota (46.9° N, 101.5° W: paleocoordinates 52.6° N, 74.4° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Hell Creek Formation (Montana Group), Lancian (70.6 - 66.0 Ma)
• bed-level stratigraphic resolution
Environment/lithology: fluvial; mudstone
Size classes: macrofossils, mesofossils
Preservation: mold/impression
Collected by J. Hoganson
Collection methods: surface (float), surface (in situ),
Primary reference: J. W. Hoganson, J. M. Campbell, and E. C. Murphy. 1994. Stratigraphy and paleontology of the Cretaceous Hell Creek Formation, Stumpf site, Morton County, North Dakota. Proceedings of the North Dakota Academy of Sciences 48:95 [J. Alroy/J. Alroy/M. Carrano]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 14620: authorized by John Alroy, entered by John Alroy on 15.05.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Sphaerium sp. Scopoli 1777 fingernail clam | |
Unionidae indet. Rafinesque 1820 freshwater mussel | |
Gastropoda | |
Physa sp. Draparnaud 1801 snail | |
Lioplacodes sp. Meek and Hayden 1864 snail
Campeloma acroterion snail | |
Chondrichthyes | |
"Lissodus selachos" = Lonchidion selachos
"Lissodus selachos" = Lonchidion selachos Estes 1964 elasmobranch | |
Myledaphus bipartitus Cope 1876 guitarfish | |
Actinopteri | |
Coriops cf. amnicolus Estes 1969 bonefish | |
"Kindleia fragosa" = Cyclurus fragosus
"Kindleia fragosa" = Cyclurus fragosus Jordan 1927 bowfin | |
Lepisosteus sp. Agassiz 1843 gar | |
Reptilia | |
Dromaeosauridae indet. Colbert and Russell 1969 maniraptoran | |
Tyrannosauridae indet. Osborn 1906 tyrannosaurid | |
Ceratopsidae indet. Marsh 1888 ceratopsid | |
Brachychampsa cf. montana Gilmore 1911 crocodilian
Alligatorinae indet. crocodilian | |
"Leidyosuchus sternbergi" = Borealosuchus sternbergii
"Leidyosuchus sternbergi" = Borealosuchus sternbergii Gilmore 1910 crocodilian | |
Champsosaurus laramiensis Brown 1905 choristodere | |
Sauria indet. diapsid | |
Compsemys victa Leidy 1856 turtle | |
Helopanoplia distincta Hay 1908 turtle | |
Trionychidae indet. Gray 1825 softshell turtle | |
Mammalia | |
Meniscoessus cf. robustus Marsh 1889 multituberculate |