Protocardia
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Late Cretaceous, Bearpaw Sh. Collection locality: Reiskind Section #9; N of Ingomar, Rosebud County, Montana, USA. Collected by Jeremy Reiskind, 1966-06-30. IP number 655013; lot count 1; accn=IPA.07081; associatedwith=from same original lot: IP.655013,IP.655030,IP.655031,IP.655032,IP.655033,IP.655034,IP.655035,IP.655036,IP.655037,IP.655038,IP.655039,IP.655040,IP.655041,IP.655042,IP.655043,IP.655044,IP.655045,IP.655046,IP.655047,IP.655048,IP.655049,IP.655050,IP.655051,IP.655052,IP.655014,IP.655015,IP.655016,IP.655017,IP.655018,IP.655019,IP.655020,IP.655021,IP.655022,IP.655023,IP.655024,IP.655025,IP.655027,IP.655028,IP.655029,IP.655026.
Yale Peabody Museum’s own description