There are 10 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) |
| 23219 | S. Holland | Dunleith Formation, Eagle Point Member Ostracodes of Iowa Shermanian - Ordovician 4-5 - Iowa | Swain (1987) |
| 23235 | S. Holland | Scales Shale, Elgin Member Ostracodes of Iowa Edenian/Maysvillian - Ordovician 5 - Iowa | Swain (1987) |
| 23236 | S. Holland | Scales Shale, Clermont Member Ostracodes of Iowa Maysvillian - Ordovician 5 - Iowa | Swain (1987) |
| 23237 | S. Holland | Fort Atkinson Limestone Ostracodes of Iowa Maysvillian - Ordovician 5 - Iowa | Swain (1987) |
| 23238 | S. Holland | Brainard Shale Ostracodes of Iowa Richmondian - Ordovician 5 - Iowa | Swain (1987) |