Full reference: G. R. Wieland. 1896. Archelon ischyros: a ne gigantic cryptodire testudinate from the Fort Pierre Cretaceous of South Dakota. The American Journal of Science, series 4 2(12):399-412
Sister taxa: none
Type specimen: Its type locality is south fork, Cheyenne River, which is in a Campanian/Maastrichtian terrestrial horizon in the Pierre Shale Formation of South Dakota
Distribution: found only at south fork, Cheyenne River
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.