Oxytoma (Hypoxytoma) nebrascana
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Late Cretaceous, Fox Hills Fm, Trail City Mbr. Collection locality: various layers in road cut on E side of spur and on W side of old US 12 about .75 mi S of intersection with Wakpala road, N side of hill with Ridgeview 1954 bench mark, and 4.5 mi S of Mahto, Corson County, South Dakota, USA. Collected by Karl M. Waage, George Colton, 1949. IP number 562133; lot count 1; taphonomy=concretion; accn=IPA.07048; associatedwith=on same slab: IP.562133,IP.562978,IP.562979,IP.562980,IP.562981,IP.562982,IP.562983,IP.562992,IP.562984,IP.562985,IP.562986,IP.562987,IP.562988,IP.562989,IP.562990,IP.562991,IP.562993,IP.562994,IP.562995,IP.562996,IP.562997,IP.562998,IP.562999,IP.563000.
Yale Peabody Museum’s own description