There are 15 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 382 | J. Sepkoski | North end of Orchard Creek Exposure, 1.6 km north of Thebes Richmondian - Ordovician 5 - Illinois | Guensburg (1988) |
| 396 | J. Sepkoski | Carroll Lake, Maquoketa Fm. Richmondian - Ordovician 5 - Illinois | Parker (1983) |
| 23304 | S. Holland | Mifflin Formation Bryozoa of the Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Iowa, Wisconsin, Illinois | Karklins (1987) |
| 23305 | S. Holland | Quimbys Mill Formation Bryozoans of the Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Wisconsin, Illinois, Iowa | Karklins (1987) |
| 23309 | S. Holland | Decorah Shale (Stictopora angularis zone) Bryozoans, Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Minnesota, Iowa, Wisconsin, Illinois | Karklins (1987) |
| 23311 | S. Holland | Spechts Ferry Shale Bryozoans of the Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Minnesota, Iowa, Wisconsin, Illinois | Karklins (1987) |
| 23312 | S. Holland | Decorah Shale (Stictopora mutabilis zone) Bryozoans, Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Minnesota, Iowa, Wisconsin, Illinois | Karklins (1987) |
| 23314 | S. Holland | Guttenberg Formation Bryozoans of the Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Minnesota, Iowa, Wisconsin, Illinois | Karklins (1987) |
| 23377 | S. Holland | Decorah Shale (Stictopora minima zone) Bryozoans, Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Minnesota, Iowa, Wisconsin, Illinois | Karklins (1987) |
| 23378 | S. Holland | Ion Formation Bryozoans of the Upper Mississippi Valley Rocklandian - Ordovician 4-5 - Minnesota, Iowa, Wisconsin, Illinois | Karklins (1987) |
| 26684 | M. Foote | Diamphidiocystis drepanon-Savagella Comm., Orchard Creek Shale, Scales Fm. Richmondian - Ordovician 5 - Illinois | Frest et al. (1999) |
| 154952 | P. Wagner | Near Batchtown (= 1 mile north of Batchtown according to Pojeta & Runnegar 1976) Shermanian - Ordovician 4-5 - Illinois | Bradley (1930) |
| 167613 | B. Kröger | Wilmington, Richmond Fm. Richmondian - Ordovician 5 - Illinois | Bassler (1911) |
| 167614 | B. Kröger | Wilmington, Fernvale Limestone Richmondian - Ordovician 5 - Illinois | Bassler (1911) |
| 167615 | B. Kröger | Savanna, Richmond Fm. (= Savannah) Richmondian - Ordovician 5 - Illinois | Bassler (1911) |