There are 23 matches

Collection Authorizer Collection name Reference
23614S. Holland Pecatonica Formation Gastropoda and Monoplacophora, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23615S. Holland Mifflin Formation Gastropoda and Monoplacophora, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23617S. Holland Grand Detour Formation Gastropoda and Monoplacophora, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23619S. Holland Nachusa Formation Gastropoda and Monoplacophora, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23620S. Holland Quimbys Mill Formation Gastropoda and Monoplacophora, Illinois and Iowa Blackriveran - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23621S. Holland Spechts Ferry Formation Gastropoda and Monoplacophora, Illinois and Iowa Blackriveran/Rocklandian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23622S. Holland Guttenberg Formation Gastropoda and Monoplacophora, Illinois and Iowa Rocklandian/Kirkfieldian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23623S. Holland Ion Formation, Buckhorn Member Gastropoda and Monoplacophora, Illinois and Iowa Kirkfieldian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23644S. Holland Ion Formation, St. James Member Gastropoda and Monoplacophora, IL and IA Kirkfieldian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23651S. Holland Dunleith Fm, Beecher Member Member Gastropoda and Monoplacophophora, IL and IA Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23653S. Holland Dunleith Fm, Eagle Point Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23656S. Holland Dunleith Fm, Fairplay Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23659S. Holland Dunleith Fm, Mortimer Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23664S. Holland Dunleith Fm, Rivoli Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23667S. Holland Dunleith Fm, Sherwood Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23668S. Holland Dunleith Fm, Wall Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23670S. Holland Dunleith Fm, Wyota Member Gastropoda and Monoplacophora, Illinois and Iowa Shermanian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23678S. Holland Wise Lake Fm, Sinsinawa Member Gastropoda and Monoplacophora, Illinois and Iowa Edenian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23679S. Holland Wise Lake Fm, Rifle Hill Member Gastropoda and Monoplacophora, Illinois and Iowa Edenian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23680S. Holland Dubuque Formation Gastropoda and Monoplacophora, Illinois and Iowa Edenian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23682S. Holland Scales Shale, Elgin Member Gastropoda and Monoplacophora, Illinois and Iowa Edenian/Maysvillian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
23684S. Holland Scales Shale, Clermont Member Gastropoda and Monoplacophora, Illinois and Iowa Maysvillian - Ordovician 4 - Illinois, Iowa Sloan and Webers (1987)
172795P. Wagner Dover Mills Richmondian - Ordovician 5 - Iowa Ladd (1925)

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