Also known as SDSM V-685
Where: Niobrara County, Wyoming (43.3° N, 104.4° W: paleocoordinates 49.7° N, 79.2° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Lance Formation, Lancian (70.6 - 66.0 Ma)
• member-level stratigraphic resolution
Environment/lithology: fluvial; poorly lithified, gray sandstone
Size classes: macrofossils, mesofossils
Reposited in the SDSM
Collection methods: surface (float)
• "surface prospecting" of a blowout
Primary reference: J. L. Whitmore and J. E. Martin. 1986. Vertebrate fossils from the Greasewood Creek locality in the Late Cretaceous Lance Formation of Niobrara County, Wyoming. Proceedings of the South Dakota Academy of Sciences 65:33-50 [J. Alroy/M. Sommers]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 14557: authorized by John Alroy, entered by John Alroy on 15.05.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
"Pediomys cf. krejcii" = Leptalestes krejcii
"Pediomys cf. krejcii" = Leptalestes krejcii Clemens 1966 metatherian | |
Reptilia | |
Compsemys victa Leidy 1856 turtle | |
cf. Baenidae indet. Cope 1882 turtle | |
cf. Helopanoplia distincta Hay 1908 turtle | |
Trionychidae indet. Gray 1825 softshell turtle | |
"Leidyosuchus sternbergi" = Borealosuchus sternbergii
"Leidyosuchus sternbergi" = Borealosuchus sternbergii Gilmore 1910 crocodilian | |
Brachychampsa montana Gilmore 1911 crocodilian | |
Crocodylidae indet. crocodile | |
cf. Triceratops sp. Marsh 1889 ceratopsid | |
cf. Thescelosaurus sp. Gilmore 1913 ornithopod | |
cf. Edmontosaurus sp. Lambe 1917 hadrosaurine | |
Paronychodon lacustris Cope 1876 maniraptoran | |
cf. Albertosaurus sp. Osborn 1905 Alberta lizard | |
Champsosaurus sp. Cope 1876 choristodere | |
Amphibia | |
Opisthotriton kayi Auffenberg 1961 salamander | |
Scapherpeton tectum Cope 1876 salamander
Habrosaurus dilatus Gilmore 1928 siren | |
Actinopteri | |
Amia fragosa Jordan 1927 bowfin | |
"Atractosteus occidentalis" = Lepisosteus occidentalis
"Atractosteus occidentalis" = Lepisosteus occidentalis Leidy 1856 gar | |
Belonostomus longirostris Lambe 1902 | |
Osteichthyes | |
Acipenser eruciferus Cope 1876 sturgeon | |
Chondrichthyes | |
Myledaphus bipartitus Cope 1876 guitarfish |