There are 3 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23680 | S. Holland | Dubuque Formation Gastropoda and Monoplacophora, Illinois and Iowa Edenian - Ordovician 5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23682 | S. Holland | Scales Shale, Elgin Member Gastropoda and Monoplacophora, Illinois and Iowa Edenian/Maysvillian - Ordovician 5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23684 | S. Holland | Scales Shale, Clermont Member Gastropoda and Monoplacophora, Illinois and Iowa Maysvillian - Ordovician 5 - Illinois, Iowa | Sloan and Webers (1987) |