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undet. Heterohelicidae
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
About this work
Geological context: Late Cretaceous, Niobrara Fm. Collection locality: base of Niobrara Fm, Oacoma, Brule County, South Dakota, USA. IP number 652089; lot count 1; accn=IPA.07200; associatedwith=on same slide: IP.238941.
Yale Peabody Museum’s own descriptionSubjects
Credit lineundet. Heterohelicidae (YPM IP 652089). Photograph by Theodore A. Kuhn. Yale Peabody Museum, Invertebrate Paleontology. CC0.
