There are 6 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23778 | S. Holland | Wise Lake Formation, Sinsinawa Member Cephalopods, Illinois, Iowa, Wisconsin Edenian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23779 | S. Holland | Wise Lake Formation, Rifle Hill Member Cephalopods, Illinois, Iowa, Wisconsin Edenian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23780 | S. Holland | Dubuque Formation Cephalopods, Illinois, Iowa, Wisconsin Edenian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 23783 | S. Holland | Scales Shale, Elgin Member Cephalopods, Illinois, Iowa, Wisconsin Edenian/Maysvillian - Ordovician 5 - Illinois, Iowa, Wisconsin | Catalani (1987) |
| 24169 | S. Holland | Stewartville Dolomite Cephalopods, Iowa and Minnesota Late Ordovician - Ordovician 4-5 - Iowa, Minnesota | Miller et al. (1954) |
| 24170 | S. Holland | Maquoketa Formation Cephalopods, Iowa Edenian - Ordovician 5 - Iowa | Miller et al. (1954) |