There are 5 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23203 | S. Holland | Spechts Ferry Formation Ostracodes of Iowa Rocklandian - Ordovician 4-5 - Iowa | Swain (1987) |
| 23207 | S. Holland | Guttenberg Formation Ostracodes of Iowa Rocklandian - Ordovician 4-5 - Iowa | Swain (1987) |
| 23214 | S. Holland | Ion Formation, Buckhorn Member Ostracodes of Iowa Kirkfieldian - Ordovician 4-5 - Iowa | Swain (1987) |
| 23215 | S. Holland | Ion Formation, St. James Member Ostracodes of Iowa Kirkfieldian - Ordovician 4-5 - Iowa | Swain (1987) |
| 23217 | S. Holland | Dunleith Formation, Beecher Member Ostracodes of Iowa Shermanian - Ordovician 4-5 - Iowa | Swain (1987) |