There are 6 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23788 | S. Holland | Sardeson Collection, Glenwood Formation, Illinois and Iowa Blackriveran - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |
| 23789 | S. Holland | Sardeson Collection, Pecatonica Formation, Illinois and Iowa Blackriveran - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |
| 23790 | S. Holland | Sardeson Collection, Mifflin Formation, Illinois and Iowa Blackriveran - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |
| 23791 | S. Holland | Sardeson Collection, Grand Detour Formation, Illinois and Iowa Blackriveran - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |
| 23792 | S. Holland | Sardeson Collection, Nachusa Formation, Illinois and Iowa Blackriveran - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |
| 23794 | S. Holland | Sardeson Collection, Quimbys Mill Formation, Illinois and Iowa Blackriveran - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |