There are 2 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23557 | S. Holland | Platteville Formation Gastropoda and Monoplacophora, Minnesota Blackriveran/Rocklandian - Ordovician 4-5 - Minnesota | Sloan and Webers (1987) |
| 23558 | S. Holland | Decorah Shale Gastropoda and Monoplacophora, Minnesota Rocklandian/Kirkfieldian - Ordovician 4-5 - Minnesota | Sloan and Webers (1987) |