undet. Scaphitidae
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Late Cretaceous, Fox Hills Fm, Timber Lake Mbr. Collection locality: float concs., on spur where slump, SW-facing exposures on ridge extending NW from bluffs on Timber Lake Mbr, and about .5 mi W of loc C0089, and 2.5 mi WSW of Green Grass, Dewey County, South Dakota, USA. Collected by Karl M. Waage, Ian G. Speden, 1962. IP number 908596; lot count 1; captive; accn=IPA.07048; associatedwith=on same slab: IP.908596,IP.908618,IP.908601,IP.908621,IP.908607,IP.908604,IP.908611,IP.908602,IP.908620,IP.908599,IP.908606,IP.908608,IP.908615,IP.908614,IP.908597,IP.908612,IP.908600,IP.908603,IP.908605,IP.908598,IP.908609,IP.908613,IP.908619,IP.908616,IP.908610,IP.908617.
Yale Peabody Museum’s own description