Scaphites sp.
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Late Cretaceous, Carlile Sh, Turner Sandy Mbr. Collection locality: concretion b, huge limestone concretions in Turner, N end of Orman Dam, E side of Belle fourche Reservoir, & 3.5 mi N of US Rt 212, & 7 mi NE of Belle Fourche, Butte County, South Dakota, USA. Collected by Karl M. Waage, Neil H. Landman, 1977. IP number 613526; lot count 1; taphonomy=concretion; accn=IPA.07111; associatedwith=IP.613527,IP.613528,IP.613529,IP.613530,IP.613531,IP.613532,IP.613533,IP.613534,IP.613535,IP.613536,IP.613537,IP.613538,IP.613539,IP.613540,IP.613541,IP.613543,IP.613544,IP.613545,IP.613546,IP.613547,IP.613548,IP.613549,IP.613542.
Yale Peabody Museum’s own description