There are 6 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23659 | S. Holland | Dunleith Fm, Mortimer Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4-5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23664 | S. Holland | Dunleith Fm, Rivoli Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4-5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23667 | S. Holland | Dunleith Fm, Sherwood Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4-5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23668 | S. Holland | Dunleith Fm, Wall Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4-5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23670 | S. Holland | Dunleith Fm, Wyota Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4-5 - Illinois, Iowa | Sloan and Webers (1987) |
| 23678 | S. Holland | Wise Lake Fm, Sinsinawa Member Gastropoda and Monoplacophora, Illinois and Iowa Edenian - Ordovician 5 - Illinois, Iowa | Sloan and Webers (1987) |