undet. Mollusca
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: butte-like toe of SE-trending spur and adjoining outcrops and float areas, "Happy Hill", SE of Bench Mark Church, and about 6 mi WSW of Little Eagle, Corson County, South Dakota, USA. Collected by Ian G. Speden, 1962. IP number 315383; lot count 1; taphonomy=concretion; accn=IPA.07048; associatedwith=on same slab: IP.315383,IP.315388,IP.315393,IP.315394,IP.315398,IP.315399,IP.315407,IP.315408,IP.315384,IP.315385,IP.315386,IP.315387,IP.315389,IP.315390,IP.315391,IP.315392,IP.315395,IP.315396,IP.315397,IP.315400,IP.315401,IP.315402,IP.315403,IP.315404,IP.315405,IP.315406,IP.315409,IP.315410,IP.315411,IP.315412,IP.315413,IP.315414.
Yale Peabody Museum’s own description