Where: Meade County, South Dakota (44.3° N, 102.4° W: paleocoordinates 50.3° N, 76.6° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Hoploscaphites birkelundae ammonoid zone, Fox Hills Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified sandstone
Size class: macrofossils
Collection methods: Repository: Black Hills Museum of Natural History, Hill City, SD
Primary reference: W. J. Kennedy, N. H. Landman, and W. A. Cobban. 1996. The Maastrichtian ammonites Coahuilites sheltoni Böse, 1928, and Sphenodiscus pleurisepta (Conrad, 1857), from the uppermost Pierre Shale and basal Fox Hills Formation of Colorado and Wyoming. American Museum Novitates 3186:1-14 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 178315: authorized by Matthew Clapham, entered by Matthew Clapham on 30.04.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Sphenodiscus pleurisepta Conrad 1857 ammonite |