Stumpf Site (Level B) (Cretaceous of the United States)

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; siltstone

• "fluvial sandstones" but shown in a section as a siltstone

Size classes: macrofossils, mesofossils

Collected by J. Hoganson

Collection methods: 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 14621: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• "several hundred fossils," large majority of which are not mammals
Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
 Lamniformes - Odontaspididae
Carcharias sp. Rafinesque 1810 sand shark
Actinopteri
 Albuliformes - Albulidae
Coriops cf. amnicolus Estes 1969 bonefish
 Amiiformes - Amiidae
"Kindleia fragosa" = Cyclurus fragosus
"Kindleia fragosa" = Cyclurus fragosus Jordan 1927 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
Osteichthyes
 Caudata - Urodela
Scapherpeton tectum Cope 1876 salamander
Lisserpeton cf. bairdi Estes 1965 salamander
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
Trionychidae indet.2 Gray 1825 softshell turtle
"Trionyx (Trionyx)"
 Testudines - Baenidae
Baenidae indet. Cope 1882 turtle
 Testudines - Pantrionychidae
Helopanoplia distincta Hay 1908 turtle
 Sauria -
 Avetheropoda - Dromaeosauridae
Dromaeosauridae indet. Colbert and Russell 1969 coelurosaur
 Avetheropoda - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906 tyrannosaurid
 Ornithischia -
Ankylosauria indet. ornithischian
 Neornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
Edmontosaurus annectens Marsh 1892 hadrosaurine
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii
"Leidyosuchus sternbergi" = Borealosuchus sternbergii Gilmore 1910 crocodilian
 Crocodylia - Alligatoridae
Alligatorinae indet. Cuvier 1807 crocodilian
 Crocodylia -
Brachychampsa cf. montana Gilmore 1911 crocodilian
 Choristodera -
Champsosaurus laramiensis Brown 1905 choristodere
Mammalia
 Didelphimorphia - Alphadontidae
Alphadontidae indet.1 Marshall et al. 1990 marsupial
 Didelphimorphia - Stagodontidae
cf. Didelphodon sp. Marsh 1889 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus cf. robustus Marsh 1889 multituberculate