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Mifflin Formation Echinoderms of the Upper Mississippi Valley, Clinton County, Iowa, USA

Lat/Long (Decimal)	42,-90.5
Co-ordinates Derivation	not explained
Given Location	Iowa, United States
Mindat.org Region (for given coordinates)	Clinton County, Iowa, USA

Collections

Collection	Reference	Stratigraphic Name	Comments	Lithology	Age
Calliocrinus longispinus-Eucalyptocrinites cf. ornatus Assoc., Eastern Iowa	Frest T. J., Brett C. E., et al (1999)	Scotch Grove - Welton	middle Welton Member, Scotch Grove Formation	wackestone	433.4 - 427.4 Ma Silurian
Brainard Shale Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Maquoketa - Brainard Shale		"shale"	449.5 - 443.7 Ma Paleozoic
Neda Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Maquoketa - Neda			449.5 - 443.7 Ma Paleozoic
Sardeson Collection, Scales Shale, Clermont Member, Illinois and Iowa	Catalani J. A. (1987)	Maquoketa - Scales Shale - Clermont		"shale"	452 - 449.5 Ma Late/Upper Ordovician
Scales Shale, Clermont Member Echinoderms, Upper Mississippi Valley (IL, IA)	Kolata D. R., Brower J. C., et al (1987)	Maquoketa - Scales Shale - Clermont		"shale"	452 - 449.5 Ma Late/Upper Ordovician
Scales Shale, Clermont Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Maquoketa - Scales Shale - Clermont		"shale"	452 - 449.5 Ma Late/Upper Ordovician
Dubuque Formation Echinoderms, Upper Mississippi Valley (Illinois, Iowa)	Kolata D. R., Brower J. C., et al (1987)	Galena - Dubuque		wackestone	460.9 - 449.5 Ma Ordovician
Dubuque Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dubuque		wackestone	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Beecher Member Member Gastropoda and Monoplacophophora, IL and IA	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Beecher		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Eagle Point Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Eagle Point		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Fairplay Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Fairplay		"shale"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Mortimer Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Mortimer		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Rivoli Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Rivoli		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Sherwood Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Sherwood		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Wall Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Wall		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Fm, Wyota Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Dunleith - Wyota		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Beecher Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Beecher		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Eagle Point Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Eagle Point		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Fairplay Member Echioderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Fairplay		"shale"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Mortimer Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Mortimer		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Rivoli Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Rivoli		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Sherwood Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Sherwood		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Wall Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Wall		"limestone"	460.9 - 449.5 Ma Ordovician
Dunleith Formation, Wyota Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Dunleith - Wyota		"limestone"	460.9 - 449.5 Ma Ordovician
Glenwood Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Glenwood			460.9 - 449.5 Ma Ordovician
Grand Detour Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Platteville - Grand Detour		"limestone"	460.9 - 449.5 Ma Ordovician
Grand Detour Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Grand Detour		"limestone"	460.9 - 449.5 Ma Ordovician
Guttenberg Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Guttenberg		"limestone"	460.9 - 449.5 Ma Ordovician
Guttenberg Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Guttenberg		"limestone"	460.9 - 449.5 Ma Ordovician
Ion Formarion, Buckhorn Member Echinoderms, Upper MIssissippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Ion - Buckhorn		"limestone"	460.9 - 449.5 Ma Ordovician
Ion Formation, Buckhorn Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Ion - Buckhorn		"limestone"	460.9 - 449.5 Ma Ordovician
Ion Formation, St. James Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Ion - St. James		"shale"	460.9 - 449.5 Ma Ordovician
Ion Formation, St. James Member Gastropoda and Monoplacophora, IL and IA	Sloan R. E., Webers G. F. (1987)	Galena - Ion - St. James		"shale"	460.9 - 449.5 Ma Ordovician
Mifflin Formation Echinoderms of the Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Mifflin		"limestone"	460.9 - 449.5 Ma Ordovician
Mifflin Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Mifflin		"limestone"	460.9 - 449.5 Ma Ordovician
Nachusa Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Nachusa			460.9 - 449.5 Ma Ordovician
Nachusa Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Nachusa			460.9 - 449.5 Ma Ordovician
Pecatonica Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Platteville - Pecatonica		"limestone"	460.9 - 449.5 Ma Ordovician
Pecatonica Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Pecatonica		"limestone"	460.9 - 449.5 Ma Ordovician
Quimbys Mill Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Quimbys Mill		"limestone"	460.9 - 449.5 Ma Ordovician
Quimbys Mill Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Quimbys Mill		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dubuque Formation, Illinois, Iowa	Catalani J. A. (1987)	Galena - Dubuque		wackestone	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Beecher Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Beecher		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Eagle Point Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Eagle Point		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Fairplay Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Fairplay		"shale"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Mortimer Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Mortimer		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Rivoli Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Rivoli		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Sherwood Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Sherwood		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Wall Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Wall		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Dunleith Formation, Wyota Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Dunleith - Wyota		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Glenwood Formation, Illinois and Iowa	Catalani J. A. (1987)	Glenwood			460.9 - 449.5 Ma Ordovician
Sardeson Collection, Grand Detour Formation, Illinois and Iowa	Catalani J. A. (1987)	Grand Detour		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Guttenberg Formation, Illinois and Iowa	Catalani J. A. (1987)	Galena - Guttenberg		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Ion Formation, Buckhorn Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Ion - Buckhorn		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Ion Formation, St. James Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Ion - St. James		"shale"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Mifflin Formation, Illinois and Iowa	Catalani J. A. (1987)	Mifflin		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Nachusa Formation, Illinois and Iowa	Catalani J. A. (1987)	Nachusa			460.9 - 449.5 Ma Ordovician
Sardeson Collection, Pecatonica Formation, Illinois and Iowa	Catalani J. A. (1987)	Pecatonica		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Quimbys Mill Formation, Illinois and Iowa	Catalani J. A. (1987)	Quimbys Mill		"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Scales Shale, Elgin Member, Illinois and Iowa	Catalani J. A. (1987)	Maquoketa - Scales Shale - Elgin	Elgin probably is Maysvillian only.	"limestone"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Spechts Ferry Formation, Illinois and Iowa	Catalani J. A. (1987)	Spechts Ferry		"shale"	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Wise Lake Formation, Rifle Hill Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Wise Lake - Rifle Hill	Rifle Hill Member = "Stewartville" Member	dolomite	460.9 - 449.5 Ma Ordovician
Sardeson Collection, Wise Lake Formation, Sinsinawa Member, Illinois and Iowa	Catalani J. A. (1987)	Galena - Wise Lake - Sinsinawa		"limestone"	460.9 - 449.5 Ma Ordovician
Scales Shale, Elgin Member Echinoderms, Upper Mississippi Valley (Illinois Iowa)	Kolata D. R., Brower J. C., et al (1987)	Maquoketa - Scales Shale - Elgin		"limestone"	460.9 - 449.5 Ma Ordovician
Scales Shale, Elgin Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Maquoketa - Scales Shale - Elgin		"limestone"	460.9 - 449.5 Ma Ordovician
Spechts Ferry Formation Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Spechts Ferry		"shale"	460.9 - 449.5 Ma Ordovician
Spechts Ferry Formation Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Spechts Ferry		"shale"	460.9 - 449.5 Ma Ordovician
St. Peter Sandstone Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	St. Peter Sandstone		sandstone	460.9 - 449.5 Ma Ordovician
Wise Lake Fm, Rifle Hill Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Wise Lake - Rifle Hill	Rifle Hill Member = "Stewartville" Member	dolomite	460.9 - 449.5 Ma Ordovician
Wise Lake Fm, Sinsinawa Member Gastropoda and Monoplacophora, Illinois and Iowa	Sloan R. E., Webers G. F. (1987)	Galena - Wise Lake - Sinsinawa		"limestone"	460.9 - 449.5 Ma Ordovician
Wise Lake Formation, Rifle Hill Formation Echinoderms, Upper Mississippi Valle	Kolata D. R., Brower J. C., et al (1987)	Galena - Wise Lake - Rifle Hill	Rifle Hill Member = "Stewartville" Member	dolomite	460.9 - 449.5 Ma Ordovician
Wise Lake Formation, Sinsinawa Member Echinoderms, Upper Mississippi Valley	Kolata D. R., Brower J. C., et al (1987)	Galena - Wise Lake - Sinsinawa		"limestone"	460.9 - 449.5 Ma Ordovician

Recorded Fossils

Accepted Name	Hierarchy	Age
Eunema simile species	*Eunema simile*	460.9 - 449.5 Ma Ordovician
Basilicus (Basiliella) sp. subgenus	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Basilicus : *Basilicus (Basiliella)*	460.9 - 449.5 Ma Ordovician
Isotelus sp. genus	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : *Isotelus*	460.9 - 449.5 Ma Ordovician
Isotelus gigas species	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus : *Isotelus gigas*	460.9 - 449.5 Ma Ordovician
Isotelus iowensis species	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus : *Isotelus iowensis*	460.9 - 449.5 Ma Ordovician
Isotelus susae species	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus : *Isotelus susae*	460.9 - 449.5 Ma Ordovician
Bumastoides sp. genus	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Bumastoides*	460.9 - 449.5 Ma Ordovician
Bumastus sp. genus	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Bumastus*	433.4 - 427.4 Ma Silurian
Bumastus (Bumastoides) milleri species	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : Bumastoides : *Bumastus (Bumastoides) milleri*	460.9 - 449.5 Ma Ordovician
Bumastus orbicaudatus species	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : Bumastus : *Bumastus orbicaudatus*	460.9 - 449.5 Ma Ordovician
Illaenus sp. genus	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Illaenus*	460.9 - 449.5 Ma Ordovician
Stenopareia sp. genus	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Stenopareia*	433.4 - 427.4 Ma Silurian
Thaleops sp. genus	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Thaleops*	460.9 - 449.5 Ma Ordovician
Thaleops ovata species	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : Thaleops : *Thaleops ovata*	460.9 - 449.5 Ma Ordovician
Amphilichas sp. genus	Animalia : Arthropoda : Trilobita : Lichida : Lichidae : *Amphilichas*	460.9 - 449.5 Ma Ordovician
Calymene sp. genus	Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : *Calymene*	460.9 - 449.5 Ma Ordovician
Flexicalymene senaria species	Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : Flexicalymene : *Flexicalymene senaria*	460.9 - 449.5 Ma Ordovician
Acanthoparypha sp. genus	Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : *Acanthoparypha*	460.9 - 449.5 Ma Ordovician
Ceraurinella sp. genus	Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : *Ceraurinella*	460.9 - 449.5 Ma Ordovician
Ceraurinus icarus species	Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : Ceraurinus : *Ceraurinus icarus*	460.9 - 449.5 Ma Ordovician
Ceraurus pleurexanthemus species	Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : Ceraurus : *Ceraurus pleurexanthemus*	460.9 - 449.5 Ma Ordovician
Gabriceraurus sp. genus	Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : *Gabriceraurus*	460.9 - 449.5 Ma Ordovician
Erratencrinurus vigilans species	Animalia : Arthropoda : Trilobita : Phacopida : Encrinuridae : Erratencrinurus : *Erratencrinurus vigilans*	460.9 - 449.5 Ma Ordovician
Eomonorachus sp. genus	Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : *Eomonorachus*	460.9 - 449.5 Ma Ordovician
Eomonorachus intermedius species	Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : Eomonorachus : *Eomonorachus intermedius*	460.9 - 449.5 Ma Ordovician
Sceptaspis lincolnensis species	Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : Sceptaspis : *Sceptaspis lincolnensis*	460.9 - 449.5 Ma Ordovician
Bathyurus (Raymondites) longispinus species	Animalia : Arthropoda : Trilobita : Proetida : Bathyuridae : Bathyurus : *Bathyurus (Raymondites) longispinus*	460.9 - 449.5 Ma Ordovician
Eodictyonella sp. genus	Animalia : Brachiopoda : Chileata : Dictyonellida : Eichwaldiidae : *Eodictyonella*	433.4 - 427.4 Ma Silurian
Acanthocrania sp. genus	Animalia : Brachiopoda : Craniata : Craniida : Craniidae : *Acanthocrania*	460.9 - 449.5 Ma Ordovician
Petrocrania sp. genus	Animalia : Brachiopoda : Craniata : Craniida : Craniidae : *Petrocrania*	460.9 - 449.5 Ma Ordovician
Craniops sp. genus	Animalia : Brachiopoda : Craniata : Craniopsidae : *Craniops*	460.9 - 449.5 Ma Ordovician
Orbiculoidea sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Discinidae : *Orbiculoidea*	460.9 - 449.5 Ma Ordovician
Lingulasma sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Lingulasmatidae : *Lingulasma*	460.9 - 449.5 Ma Ordovician
Lingula philomela species	Animalia : Brachiopoda : Lingulata : Lingulida : Lingulidae : Lingula : *Lingula philomela*	460.9 - 449.5 Ma Ordovician
Lingulops sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Paterulidae : *Lingulops*	460.9 - 449.5 Ma Ordovician
Pachyglossella sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Obolidae : *Pachyglossella*	460.9 - 449.5 Ma Ordovician
Palaeoglossa sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Obolidae : *Palaeoglossa*	460.9 - 449.5 Ma Ordovician
Pseudolingula sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Pseudolingulidae : *Pseudolingula*	460.9 - 449.5 Ma Ordovician
Pseudolingula iowensis species	Animalia : Brachiopoda : Lingulata : Lingulida : Pseudolingulidae : Pseudolingula : *Pseudolingula iowensis*	460.9 - 449.5 Ma Ordovician
Schizocrania sp. genus	Animalia : Brachiopoda : Lingulata : Lingulida : Trematidae : *Schizocrania*	460.9 - 449.5 Ma Ordovician
Trematis huronensis species	Animalia : Brachiopoda : Lingulata : Lingulida : Trematidae : Trematis : *Trematis huronensis*	460.9 - 449.5 Ma Ordovician
Schizambon sp. genus	Animalia : Brachiopoda : Lingulata : Siphonotretida : Siphonotretidae : *Schizambon*	460.9 - 449.5 Ma Ordovician
Anazyga recurvirostra species	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Anazygidae : Anazyga : *Anazyga recurvirostra*	460.9 - 449.5 Ma Ordovician
Zygospira sp. genus	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Anazygidae : *Zygospira*	460.9 - 449.5 Ma Ordovician
Zygospira lebanonensis species	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Anazygidae : Zygospira : *Zygospira lebanonensis*	460.9 - 449.5 Ma Ordovician
Zygospira modesta species	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Anazygidae : Zygospira : *Zygospira modesta*	460.9 - 449.5 Ma Ordovician
Atrypa reticularis species	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atrypa : *Atrypa reticularis*	433.4 - 427.4 Ma Silurian
Plectatrypa sp. genus	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : *Plectatrypa*	433.4 - 427.4 Ma Silurian
Cyclospira bisulcata species	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Cyclospiridae : Cyclospira : *Cyclospira bisulcata*	460.9 - 449.5 Ma Ordovician
Atrypoidea sp. genus	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Lissatrypidae : *Atrypoidea*	433.4 - 427.4 Ma Silurian
Manespira nicolleti species	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Protozygidae : Manespira : *Manespira nicolleti*	460.9 - 449.5 Ma Ordovician
Idiospira sp. genus	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Septatrypidae : *Idiospira*	460.9 - 449.5 Ma Ordovician
Dalmanella sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : *Dalmanella*	460.9 - 449.5 Ma Ordovician
Dalmanella sculpta species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Dalmanella : *Dalmanella sculpta*	460.9 - 449.5 Ma Ordovician
Eremotrema sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : *Eremotrema*	460.9 - 449.5 Ma Ordovician
Isorthis sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : *Isorthis*	433.4 - 427.4 Ma Silurian
Onniella sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : *Onniella*	460.9 - 449.5 Ma Ordovician
Paucicrura corpulenta species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Paucicrura : *Paucicrura corpulenta*	460.9 - 449.5 Ma Ordovician
Paucicrura rogata species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Paucicrura : *Paucicrura rogata*	460.9 - 449.5 Ma Ordovician
Diorthelasma weissi species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Draboviidae : Diorthelasma : *Diorthelasma weissi*	460.9 - 449.5 Ma Ordovician
Pionodema sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Draboviidae : *Pionodema*	460.9 - 449.5 Ma Ordovician
Pionodema subaequata species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Draboviidae : Pionodema : *Pionodema subaequata*	460.9 - 449.5 Ma Ordovician
Glyptorthis bellarugosa species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Glyptorthidae : Glyptorthis : *Glyptorthis bellarugosa*	460.9 - 449.5 Ma Ordovician
Glyptorthis insculpta species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Glyptorthidae : Glyptorthis : *Glyptorthis insculpta*	460.9 - 449.5 Ma Ordovician
Hesperorthis tricenaria species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Hesperorthidae : Hesperorthis : *Hesperorthis tricenaria*	460.9 - 449.5 Ma Ordovician
Austinella sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : *Austinella*	460.9 - 449.5 Ma Ordovician
Campylorthis deflecta species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Campylorthis : *Campylorthis deflecta*	460.9 - 449.5 Ma Ordovician
Dinorthis meedsi species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Dinorthis : *Dinorthis meedsi*	460.9 - 449.5 Ma Ordovician
Dinorthis pectinella species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Dinorthis : *Dinorthis pectinella*	460.9 - 449.5 Ma Ordovician
Plaesiomys proavitus species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Plaesiomys : *Plaesiomys proavitus*	460.9 - 449.5 Ma Ordovician
Plaesiomys subquadratus species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Plaesiomys : *Plaesiomys subquadratus*	460.9 - 449.5 Ma Ordovician
Diceromyonia sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platyorthidae : *Diceromyonia*	460.9 - 449.5 Ma Ordovician
Platystrophia amoena species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platystrophiidae : Platystrophia : *Platystrophia amoena*	460.9 - 449.5 Ma Ordovician
Platystrophia biforatus species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platystrophiidae : Platystrophia : *Platystrophia biforatus*	433.4 - 427.4 Ma Silurian
Platystrophia trentonensis species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platystrophiidae : Platystrophia : *Platystrophia trentonensis*	460.9 - 449.5 Ma Ordovician
Doleroides sp. genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plectorthidae : *Doleroides*	460.9 - 449.5 Ma Ordovician
Hebertella occidentalis species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plectorthidae : Hebertella : *Hebertella occidentalis*	452 - 449.5 Ma Late/Upper Ordovician
Plectorthis plicatella species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plectorthidae : Plectorthis : *Plectorthis plicatella*	460.9 - 449.5 Ma Ordovician
Camerella sp. genus	Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Camerellidae : *Camerella*	433.4 - 427.4 Ma Silurian
Parastrophina sp. genus	Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Parastrophinidae : *Parastrophina*	460.9 - 449.5 Ma Ordovician
Skenidioides sp. genus	Animalia : Brachiopoda : Rhynchonellata : Protorthida : Skenidiidae : *Skenidioides*	460.9 - 449.5 Ma Ordovician
Ferganella sp. genus	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Machaerariidae : *Ferganella*	433.4 - 427.4 Ma Silurian
Hiscobeccus capax species	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Hiscobeccus : *Hiscobeccus capax*	460.9 - 449.5 Ma Ordovician
Hypsiptycha anticostiensis species	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Hypsiptycha : *Hypsiptycha anticostiensis*	452 - 449.5 Ma Late/Upper Ordovician
Rhynchotrema sp. genus	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : *Rhynchotrema*	460.9 - 449.5 Ma Ordovician
Rostricellula sp. genus	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Trigonirhynchiidae : *Rostricellula*	460.9 - 449.5 Ma Ordovician
Rostricellula minnesotensis species	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Trigonirhynchiidae : Rostricellula : *Rostricellula minnesotensis*	460.9 - 449.5 Ma Ordovician
Cyrtia exporrectus species	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtiidae : Cyrtia : *Cyrtia exporrectus*	433.4 - 427.4 Ma Silurian
Eospirifer sp. genus	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtiidae : *Eospirifer*	433.4 - 427.4 Ma Silurian
Hedeina sp. genus	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtiidae : *Hedeina*	433.4 - 427.4 Ma Silurian
Vellamo sp. genus	Animalia : Brachiopoda : Strophomenata : Billingsellida : Clitambonitidae : *Vellamo*	460.9 - 449.5 Ma Ordovician
Oxoplecia sp. genus	Animalia : Brachiopoda : Strophomenata : Orthotetida : Triplesiidae : *Oxoplecia*	460.9 - 449.5 Ma Ordovician
Leptaena rhomboidalis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Leptaena : *Leptaena rhomboidalis*	433.4 - 427.4 Ma Silurian
Megamyonia unicostata species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Megamyonia : *Megamyonia unicostata*	460.9 - 449.5 Ma Ordovician
Rafinesquina sp. genus	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : *Rafinesquina*	460.9 - 449.5 Ma Ordovician
Rafinesquina deltoidea species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Rafinesquina : *Rafinesquina deltoidea*	460.9 - 449.5 Ma Ordovician
Rafinesquina trentonensis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Rafinesquina : *Rafinesquina trentonensis*	460.9 - 449.5 Ma Ordovician
Eoplectodonta sp. genus	Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : *Eoplectodonta*	460.9 - 449.5 Ma Ordovician
Sowerbyella curdsvillensis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Sowerbyella : *Sowerbyella curdsvillensis*	460.9 - 449.5 Ma Ordovician
Sowerbyella minnesotensis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Sowerbyella : *Sowerbyella minnesotensis*	460.9 - 449.5 Ma Ordovician
Thaerodonta recedens species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eochonetes : *Thaerodonta recedens*	460.9 - 449.5 Ma Ordovician
Bellimurina (Bellimurina) charlottae species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Bellimurina : *Bellimurina (Bellimurina) charlottae*	460.9 - 449.5 Ma Ordovician
Furcitella scofieldi species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Furcitella : *Furcitella scofieldi*	460.9 - 449.5 Ma Ordovician
Holtedahlina sp. genus	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : *Holtedahlina*	460.9 - 449.5 Ma Ordovician
Nasutimena fluctuosa species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Nasutimena : *Nasutimena fluctuosa*	460.9 - 449.5 Ma Ordovician
Oepikina sp. genus	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : *Oepikina*	460.9 - 449.5 Ma Ordovician
Oepikina minnesotensis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Oepikina : *Oepikina minnesotensis*	460.9 - 449.5 Ma Ordovician
Strophomena billingsi species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Strophomena : *Strophomena billingsi*	460.9 - 449.5 Ma Ordovician
Strophomena filitexta species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Strophomena : *Strophomena filitexta*	460.9 - 449.5 Ma Ordovician
Strophomena occidentalis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Strophomena : *Strophomena occidentalis*	460.9 - 449.5 Ma Ordovician
Strophomena plattinensis species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Strophomena : *Strophomena plattinensis*	460.9 - 449.5 Ma Ordovician
Strophomena septata species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Strophomena : *Strophomena septata*	460.9 - 449.5 Ma Ordovician
Strophomena trilobata species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Strophomena : *Strophomena trilobata*	460.9 - 449.5 Ma Ordovician
Tetraphalerella planodorsata species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Tetraphalerella : *Tetraphalerella planodorsata*	452 - 449.5 Ma Late/Upper Ordovician
Trigrammaria winchelli species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Trigrammaria : *Trigrammaria winchelli*	460.9 - 449.5 Ma Ordovician
Bryozoa phylum	Animalia : Bryozoa	433.4 - 427.4 Ma Silurian
Hudsonaster sp. genus	Animalia : Echinodermata : Asteroidea : Hudsonasteridae : *Hudsonaster*	460.9 - 449.5 Ma Ordovician
Hudsonaster narrawayi species	Animalia : Echinodermata : Asteroidea : Hudsonasteridae : Hudsonaster : *Hudsonaster narrawayi*	460.9 - 449.5 Ma Ordovician
Hudsonaster rugosus species	Animalia : Echinodermata : Asteroidea : Hudsonasteridae : Hudsonaster : *Hudsonaster rugosus*	460.9 - 449.5 Ma Ordovician
Promopalaeaster sp. genus	Animalia : Echinodermata : Asteroidea : *Promopalaeaster*	460.9 - 449.5 Ma Ordovician
Promopalaeaster wilsoni species	Animalia : Echinodermata : Asteroidea : Promopalaeaster : *Promopalaeaster wilsoni*	460.9 - 449.5 Ma Ordovician
Schuchertia sp. genus	Animalia : Echinodermata : Asteroidea : Schuchertiidae : *Schuchertia*	460.9 - 449.5 Ma Ordovician
Ulrichaster ulrichi species	Animalia : Echinodermata : Asteroidea : Platyasterida : Urasterellidae : Ulrichaster : *Ulrichaster ulrichi*	460.9 - 449.5 Ma Ordovician
Urasterella sp. genus	Animalia : Echinodermata : Asteroidea : Platyasterida : Urasterellidae : *Urasterella*	460.9 - 449.5 Ma Ordovician
Anulocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Anulocrinus*	460.9 - 449.5 Ma Ordovician
Calceocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Calceocrinidae : *Calceocrinus*	460.9 - 449.5 Ma Ordovician
Cremacrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Cremacrinus*	460.9 - 449.5 Ma Ordovician
Cremacrinus guttenbergensis species	Animalia : Echinodermata : Crinoidea : Calceocrinida : Calceocrinidae : Cremacrinus : *Cremacrinus guttenbergensis*	460.9 - 449.5 Ma Ordovician
Quienquecaudex springeri species	Animalia : Echinodermata : Crinoidea : Dendrocrinida : Cupulocrinidae : Quinquecaudex : *Quienquecaudex springeri*	460.9 - 449.5 Ma Ordovician
Dendrocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Dendrocrinidae : *Dendrocrinus*	460.9 - 449.5 Ma Ordovician
Grenprisia sp. genus	Animalia : Echinodermata : Crinoidea : *Grenprisia*	460.9 - 449.5 Ma Ordovician
Merocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Merocrinus*	460.9 - 449.5 Ma Ordovician
Cleiocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Cleiocrinus*	460.9 - 449.5 Ma Ordovician
Dimerocrinites sp. genus	Animalia : Echinodermata : Crinoidea : Dimerocrinitidae : *Dimerocrinites*	433.4 - 427.4 Ma Silurian
Ptychocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Dimerocrinitidae : *Ptychocrinus*	460.9 - 449.5 Ma Ordovician
Siphonocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Lampterocrinidae : *Siphonocrinus*	433.4 - 427.4 Ma Silurian
Traskocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Traskocrinus*	460.9 - 449.5 Ma Ordovician
Archaeocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Archaeocrinus*	460.9 - 449.5 Ma Ordovician
Rhaphanocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Rhaphanocrinus*	460.9 - 449.5 Ma Ordovician
Trichinocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Rhodocrinitidae : *Trichinocrinus*	460.9 - 449.5 Ma Ordovician
Cincinnaticrinus varibrachialus species	Animalia : Echinodermata : Crinoidea : Homocrinida : Cincinnaticrinidae : Cincinnaticrinus : *Cincinnaticrinus varibrachialus*	460.9 - 449.5 Ma Ordovician
Isotomocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Heterocrinidae : *Isotomocrinus*	460.9 - 449.5 Ma Ordovician
Ectenocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Homocrinidae : *Ectenocrinus*	460.9 - 449.5 Ma Ordovician
Ectenocrinus simplex species	Animalia : Echinodermata : Crinoidea : Homocrinida : Homocrinidae : Ectenocrinus : *Ectenocrinus simplex*	460.9 - 449.5 Ma Ordovician
Sygcaulocrinus typus species	Animalia : Echinodermata : Crinoidea : Homocrinidae : Sygcaulocrinus : *Sygcaulocrinus typus*	460.9 - 449.5 Ma Ordovician
Hybocrinus conicus species	Animalia : Echinodermata : Crinoidea : Hybocrinidae : Hybocrinus : *Hybocrinus conicus*	460.9 - 449.5 Ma Ordovician
Eucalyptocrinites sp. genus	Animalia : Echinodermata : Crinoidea : Eucalyptocrinitidae : *Eucalyptocrinites*	433.4 - 427.4 Ma Silurian
Abludoglyptocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Abludoglyptocrinus*	460.9 - 449.5 Ma Ordovician
Glyptocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Glyptocrinus*	460.9 - 449.5 Ma Ordovician
Glyptocrinus ornatus species	Animalia : Echinodermata : Crinoidea : Glyptocrinus : *Glyptocrinus ornatus*	460.9 - 449.5 Ma Ordovician
Periglyptocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Glyptocrinidae : *Periglyptocrinus*	460.9 - 449.5 Ma Ordovician
Pycnocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Glyptocrinidae : *Pycnocrinus*	460.9 - 449.5 Ma Ordovician
Marsupiocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Marsupiocrinidae : *Marsupiocrinus*	433.4 - 427.4 Ma Silurian
Allocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Allocrinus*	433.4 - 427.4 Ma Silurian
Calliocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Eucalyptocrinitidae : *Calliocrinus*	433.4 - 427.4 Ma Silurian
Periechocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Periechocrinidae : *Periechocrinus*	433.4 - 427.4 Ma Silurian
Xenocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Xenocrinus*	449.5 - 443.7 Ma Paleozoic
Iocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Iocrinidae : *Iocrinus*	452 - 449.5 Ma Late/Upper Ordovician
Cupulocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Cupulocrinus*	460.9 - 449.5 Ma Ordovician
Cupulocrinus humilis species	Animalia : Echinodermata : Crinoidea : Cupulocrinus : *Cupulocrinus humilis*	460.9 - 449.5 Ma Ordovician
Cupulocrinus latibrachiatus species	Animalia : Echinodermata : Crinoidea : Cupulocrinidae : Cupulocrinus : *Cupulocrinus latibrachiatus*	460.9 - 449.5 Ma Ordovician
Plicodendrocrinus casei species	Animalia : Echinodermata : Crinoidea : Plicodendrocrinidae : Plicodendrocrinus : *Plicodendrocrinus casei*	460.9 - 449.5 Ma Ordovician
Reteocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Reteocrinidae : *Reteocrinus*	460.9 - 449.5 Ma Ordovician
Carabocrinus sp. genus	Animalia : Echinodermata : Crinoidea : Carabocrinidae : *Carabocrinus*	460.9 - 449.5 Ma Ordovician
Carabocrinus radiatus species	Animalia : Echinodermata : Crinoidea : Carabocrinidae : Carabocrinus : *Carabocrinus radiatus*	460.9 - 449.5 Ma Ordovician
Porocrinus sp. genus	Animalia : Echinodermata : Crinoidea : *Porocrinus*	460.9 - 449.5 Ma Ordovician
Actinodiscus sp. genus	Animalia : Echinodermata : Cyclocystoidea : Cyclocystoididae : *Actinodiscus*	460.9 - 449.5 Ma Ordovician
Apycnodiscus sp. genus	Animalia : Echinodermata : Cyclocystoidea : Cyclocystoididae : *Apycnodiscus*	460.9 - 449.5 Ma Ordovician
Cyclocystoides sp. genus	Animalia : Echinodermata : Cyclocystoidea : Cyclocystoididae : *Cyclocystoides*	460.9 - 449.5 Ma Ordovician
Cyclocystoides halli species	Animalia : Echinodermata : Cyclocystoidea : Cyclocystoididae : Cyclocystoides : *Cyclocystoides halli*	460.9 - 449.5 Ma Ordovician
Eumorphocystis sp. genus	Animalia : Echinodermata : Diploporita : Eumorphocystidae : *Eumorphocystis*	460.9 - 449.5 Ma Ordovician
Bothriocidaris sp. genus	Animalia : Echinodermata : Echinoidea : Bothriocidaridae : *Bothriocidaris*	460.9 - 449.5 Ma Ordovician
Neobothriocidaris sp. genus	Animalia : Echinodermata : Echinoidea : Bothriocidaridae : *Neobothriocidaris*	460.9 - 449.5 Ma Ordovician
Edrioaster bigsbyi species	Animalia : Echinodermata : Edrioasteroidea : Edrioasterida : Edrioasteridae : Edrioaster : *Edrioaster bigsbyi*	460.9 - 449.5 Ma Ordovician
Rhenopyrgus sp. genus	Animalia : Echinodermata : Edrioasteroidea : Edrioasterida : Rhenopyrgidae : *Rhenopyrgus*	449.5 - 443.7 Ma Paleozoic
Agelacrinites sp. genus	Animalia : Echinodermata : Edrioasteroidea : Isorophida : Agelacrinitidae : *Agelacrinites*	460.9 - 449.5 Ma Ordovician
Hemicystites sp. genus	Animalia : Echinodermata : Edrioasteroidea : Hemicystitidae : *Hemicystites*	460.9 - 449.5 Ma Ordovician
Pyrgocystis sardesoni species	Animalia : Echinodermata : Edrioasteroidea : Pyrgocystidae : Pyrgocystis : *Pyrgocystis sardesoni*	460.9 - 449.5 Ma Ordovician
Astrocystites sp. genus	Animalia : Echinodermata : Edrioasteroidea : Pentacystida : Steganoblastidae : *Astrocystites*	460.9 - 449.5 Ma Ordovician
Caryocrinites sp. genus	Animalia : Echinodermata : Rhombifera : Caryocrinitidae : *Caryocrinites*	433.4 - 427.4 Ma Silurian
Amygdalocystites sp. genus	Animalia : Echinodermata : Paracrinoidea : Comarocystitida : Amygdalocystitidae : *Amygdalocystites*	460.9 - 449.5 Ma Ordovician
Tanaocystis sp. genus	Animalia : Echinodermata : Rhombifera : Dichoporita : Glyptocystidae : *Tanaocystis*	460.9 - 449.5 Ma Ordovician
Anartiocystis sp. genus	Animalia : Echinodermata : Rhombifera : Callocystitidae : *Anartiocystis*	449.5 - 443.7 Ma Paleozoic
Cheirocrinus sp. genus	Animalia : Echinodermata : Rhombifera : Cheirocrinidae : *Cheirocrinus*	460.9 - 449.5 Ma Ordovician
Coronocystis durandensis species	Animalia : Echinodermata : Rhombifera : Cheirocrinidae : Coronocystis : *Coronocystis durandensis*	460.9 - 449.5 Ma Ordovician
Glyptocystites sp. genus	Animalia : Echinodermata : Rhombifera : Glyptocystitidae : *Glyptocystites*	460.9 - 449.5 Ma Ordovician
Amecystis sp. genus	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : *Amecystis*	460.9 - 449.5 Ma Ordovician
Amecystis woodi species	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : Amecystis : *Amecystis woodi*	460.9 - 449.5 Ma Ordovician
Pleurocystites squamosus species	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : Pleurocystites : *Pleurocystites squamosus*	460.9 - 449.5 Ma Ordovician
Pleurocystites strimplei species	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : Pleurocystites : *Pleurocystites strimplei*	460.9 - 449.5 Ma Ordovician
Praepleurocystis sp. genus	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : *Praepleurocystis*	460.9 - 449.5 Ma Ordovician
Iowacystis sp. genus	Animalia : Echinodermata : Soluta : Syringocrinida : Iowacystidae : *Iowacystis*	449.5 - 443.7 Ma Paleozoic
Myeinocystites sp. genus	Animalia : Echinodermata : Soluta : Syringocrinida : Iowacystidae : *Myeinocystites*	460.9 - 449.5 Ma Ordovician
Scalenocystites sp. genus	Animalia : Echinodermata : Soluta : Syringocrinida : Iowacystidae : *Scalenocystites*	460.9 - 449.5 Ma Ordovician
Ateleocystites sp. genus	Animalia : Echinodermata : Stylophora : Mitrata : *Ateleocystites*	460.9 - 449.5 Ma Ordovician
Diamphidiocystis sp. genus	Animalia : Echinodermata : Stylophora : Mitrata : *Diamphidiocystis*	449.5 - 443.7 Ma Paleozoic
Willmanocystis sp. genus	Animalia : Echinodermata : Stylophora : Mitrata : *Willmanocystis*	460.9 - 449.5 Ma Ordovician
Cyrtodonta sp. genus	Animalia : Mollusca : Bivalvia : Cyrtodontidae : *Cyrtodonta*	460.9 - 449.5 Ma Ordovician
Cyrtodontula sp. genus	Animalia : Mollusca : Bivalvia : Cyrtodontidae : *Cyrtodontula*	460.9 - 449.5 Ma Ordovician
Matheria sp. genus	Animalia : Mollusca : Bivalvia : Cyrtodontidae : *Matheria*	460.9 - 449.5 Ma Ordovician
Vanuxemia sp. genus	Animalia : Mollusca : Bivalvia : Myalinida : Myalinidae : *Vanuxemia*	460.9 - 449.5 Ma Ordovician
Plethocardia sp. genus	Animalia : Mollusca : Bivalvia : *Plethocardia*	460.9 - 449.5 Ma Ordovician
Aristerella sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Aristerella*	460.9 - 449.5 Ma Ordovician
Cymatonota sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Cymatonota*	460.9 - 449.5 Ma Ordovician
Goniophora sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Goniophora*	460.9 - 449.5 Ma Ordovician
Modiolodon sp. genus	Animalia : Mollusca : Bivalvia : Unionida : Iridinidae : *Modiolodon*	460.9 - 449.5 Ma Ordovician
Modiolopsis sp. genus	Animalia : Mollusca : Bivalvia : Unionida : Iridinidae : *Modiolopsis*	460.9 - 449.5 Ma Ordovician
Orthodesma sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Orthodesma*	460.9 - 449.5 Ma Ordovician
Prolobella sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Prolobella*	460.9 - 449.5 Ma Ordovician
Saffordia sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Saffordia*	460.9 - 449.5 Ma Ordovician
Whiteavesia sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Whiteavesia*	460.9 - 449.5 Ma Ordovician
Eurymya sp. genus	Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : *Eurymya*	460.9 - 449.5 Ma Ordovician
Ambonychiopsis sp. genus	Animalia : Mollusca : Bivalvia : Myalinida : Ambonychiidae : *Ambonychiopsis*	460.9 - 449.5 Ma Ordovician
Cleionychia sp. genus	Animalia : Mollusca : Bivalvia : Myalinida : Ambonychiidae : *Cleionychia*	460.9 - 449.5 Ma Ordovician
Cuneamya sp. genus	Animalia : Mollusca : Bivalvia : Grammysiidae : *Cuneamya*	460.9 - 449.5 Ma Ordovician
Lyrodesma sp. genus	Animalia : Mollusca : Bivalvia : Hippuritida : Lyrodesmatidae : *Lyrodesma*	460.9 - 449.5 Ma Ordovician
Nuculites sp. genus	Animalia : Mollusca : Bivalvia : Nuculanida : Malletiidae : *Nuculites*	460.9 - 449.5 Ma Ordovician
Palaeoneilo sp. genus	Animalia : Mollusca : Bivalvia : Nuculanida : Malletiidae : *Palaeoneilo*	460.9 - 449.5 Ma Ordovician
Deceptrix sp. genus	Animalia : Mollusca : Bivalvia : Nuculida : Praenuculidae : *Deceptrix*	460.9 - 449.5 Ma Ordovician
Similodonta sp. genus	Animalia : Mollusca : Bivalvia : Nuculida : Praenuculidae : *Similodonta*	460.9 - 449.5 Ma Ordovician
Pterinea sp. genus	Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : *Pterinea*	460.9 - 449.5 Ma Ordovician
Sphenolium sp. genus	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Sphenolium*	460.9 - 449.5 Ma Ordovician
Rhytimya sp. genus	Animalia : Mollusca : Bivalvia : Pholadomyidae : *Rhytimya*	460.9 - 449.5 Ma Ordovician
Ctenodonta sp. genus	Animalia : Mollusca : Bivalvia : Solemyida : Ctenodontidae : *Ctenodonta*	460.9 - 449.5 Ma Ordovician
Tancrediopsis sp. genus	Animalia : Mollusca : Bivalvia : Solemyida : Ctenodontidae : *Tancrediopsis*	460.9 - 449.5 Ma Ordovician
Nautiloidea subclass	Animalia : Mollusca : Cephalopoda : Nautiloidea	433.4 - 427.4 Ma Silurian
Sphenosphaera platystoma species	Animalia : Mollusca : Gastropoda : Bellerophontida : Bellerophontidae : Sphenosphaera : *Sphenosphaera platystoma*	460.9 - 449.5 Ma Ordovician
Sphenosphaera rogersensis species	Animalia : Mollusca : Gastropoda : Bellerophontida : Bellerophontidae : Sphenosphaera : *Sphenosphaera rogersensis*	460.9 - 449.5 Ma Ordovician
Bucania elliptica species	Animalia : Mollusca : Gastropoda : Cycloneritida : Proserpinidae : Bucania : *Bucania elliptica*	460.9 - 449.5 Ma Ordovician
Bucania halli species	Animalia : Mollusca : Gastropoda : Cycloneritida : Proserpinidae : Bucania : *Bucania halli*	460.9 - 449.5 Ma Ordovician
Bucania sublata species	Animalia : Mollusca : Gastropoda : Cycloneritida : Proserpinidae : Bucania : *Bucania sublata*	460.9 - 449.5 Ma Ordovician
Kokenospira costalis species	Animalia : Mollusca : Gastropoda : Bucaniidae : Kokenospira : *Kokenia costalis*	460.9 - 449.5 Ma Ordovician
Loxobucania emmonsi species	Animalia : Mollusca : Gastropoda : Bucaniidae : Loxobucania : *Bucania emmonsi*	460.9 - 449.5 Ma Ordovician
Loxobucania lindsleyi species	Animalia : Mollusca : Gastropoda : Bucaniidae : Loxobucania : *Bellerophon lindsleyi*	460.9 - 449.5 Ma Ordovician
Loxobucania minnesotensis species	Animalia : Mollusca : Gastropoda : Bucaniidae : Loxobucania : *Bucania minnesotensis*	460.9 - 449.5 Ma Ordovician
Phragmolites compressus species	Animalia : Mollusca : Gastropoda : Bellerophontida : Bucaniidae : Phragmolites : *Phragmolites compressus*	460.9 - 449.5 Ma Ordovician
Phragmolites dyeri species	Animalia : Mollusca : Gastropoda : Bucaniidae : Phragmolites : *Cyrtolites dyeri*	460.9 - 449.5 Ma Ordovician
Phragmolites fimbriata species	Animalia : Mollusca : Gastropoda : Bucaniidae : Phragmolites : *Conradella fimbriata*	460.9 - 449.5 Ma Ordovician
Phragmolites obliquus species	Animalia : Mollusca : Gastropoda : Bucaniidae : Phragmolites : *Conradella obliqua*	460.9 - 449.5 Ma Ordovician
Phragmolites triangularis species	Animalia : Mollusca : Gastropoda : Bellerophontida : Bucaniidae : Phragmolites : *Phragmolites triangularis*	460.9 - 449.5 Ma Ordovician
Salpingostoma buelli species	Animalia : Mollusca : Gastropoda : Bucaniidae : Salpingostoma : *Salpingostoma buelli*	460.9 - 449.5 Ma Ordovician
Salpingostoma imbricata species	Animalia : Mollusca : Gastropoda : Bucaniidae : Salpingostoma : *Salpingostoma imbricata*	460.9 - 449.5 Ma Ordovician
Salpingostoma sculptilis species	Animalia : Mollusca : Gastropoda : Bucaniidae : Salpingostoma : *Salpingostoma sculptilis*	460.9 - 449.5 Ma Ordovician
Tetranota bidorsata species	Animalia : Mollusca : Gastropoda : Bucaniidae : Tetranota : *Bucania bidorsata*	460.9 - 449.5 Ma Ordovician
Tetranota macra species	Animalia : Mollusca : Gastropoda : Bucaniidae : Tetranota : *Tetranota macra*	460.9 - 449.5 Ma Ordovician
Tetranota obsoleta species	Animalia : Mollusca : Gastropoda : Bucaniidae : Tetranota : *Tetranota obsoleta*	460.9 - 449.5 Ma Ordovician
Tetranota sexcarinata species	Animalia : Mollusca : Gastropoda : Bucaniidae : Tetranota : *Tetranota sexcarinata*	460.9 - 449.5 Ma Ordovician
Tetranota wisconsinensis species	Animalia : Mollusca : Gastropoda : Bucaniidae : Tetranota : *Bellerophon wisconsinensis*	460.9 - 449.5 Ma Ordovician
Carinaropsis minima species	Animalia : Mollusca : Gastropoda : Bellerophontida : Pterothecidae : Carinaropsis : *Carinaropsis minima*	460.9 - 449.5 Ma Ordovician
Pterotheca attenuata species	Animalia : Mollusca : Gastropoda : Pterothecidae : Pterotheca : *Clioderma attenuata*	460.9 - 449.5 Ma Ordovician
Sinuites cancellatus species	Animalia : Mollusca : Gastropoda : Bellerophontida : Sinuitidae : Sinuites : *Sinuites cancellatus*	460.9 - 449.5 Ma Ordovician
Sinuites pervoluta species	Animalia : Mollusca : Gastropoda : Bellerophontida : Sinuitidae : Sinuites : *Sinuites pervoluta*	460.9 - 449.5 Ma Ordovician
Sinuites rectangularis species	Animalia : Mollusca : Gastropoda : Sinuitidae : Sinuites : *Protowarthia rectangularis*	460.9 - 449.5 Ma Ordovician
Sinuites subcompressa species	Animalia : Mollusca : Gastropoda : Bellerophontida : Sinuitidae : Sinuites : *Sinuites subcompressa*	460.9 - 449.5 Ma Ordovician
Alaskadiscus subacutus species	Animalia : Mollusca : Gastropoda : Bellerophontida : Temnodiscidae : Alaskodiscus : *Alaskadiscus subacutus*	460.9 - 449.5 Ma Ordovician
Straparollus sp. genus	Animalia : Mollusca : Gastropoda : Euomphalidae : *Straparollus*	433.4 - 427.4 Ma Silurian
Helicotoma planulata species	Animalia : Mollusca : Gastropoda : Helicotomidae : Helicotoma : *Helicotoma planulata*	460.9 - 449.5 Ma Ordovician
Ophiletina angularis species	Animalia : Mollusca : Gastropoda : Helicotomidae : Ophiletina : *Ophiletina angularis*	460.9 - 449.5 Ma Ordovician
Ophiletina fausta species	Animalia : Mollusca : Gastropoda : Euomphalina : Helicotomidae : Ophiletina : *Ophiletina fausta*	460.9 - 449.5 Ma Ordovician
Ophiletina sublaxa species	Animalia : Mollusca : Gastropoda : Helicotomidae : Ophiletina : *Ophiletina sublaxa*	460.9 - 449.5 Ma Ordovician
Holopea ampla species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea ampla*	460.9 - 449.5 Ma Ordovician
Holopea appressa species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea appressa*	460.9 - 449.5 Ma Ordovician
Holopea concinnula species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea concinnula*	460.9 - 449.5 Ma Ordovician
Holopea excelsa species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea excelsa*	460.9 - 449.5 Ma Ordovician
Holopea insignis species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea insignis*	460.9 - 449.5 Ma Ordovician
Holopea obliqua species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea obliqua*	460.9 - 449.5 Ma Ordovician
Holopea paludiniformis species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea paludiniformis*	460.9 - 449.5 Ma Ordovician
Holopea pyrene species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea pyrene*	460.9 - 449.5 Ma Ordovician
Holopea rotunda species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea rotunda*	460.9 - 449.5 Ma Ordovician
Holopea similis species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea similis*	460.9 - 449.5 Ma Ordovician
Holopea supraplana species	Animalia : Mollusca : Gastropoda : Holopeidae : Holopea : *Holopea supraplana*	460.9 - 449.5 Ma Ordovician
Raphistomina rugata species	Animalia : Mollusca : Gastropoda : Holopeidae : Raphistomina : *Raphistomina rugata*	460.9 - 449.5 Ma Ordovician
Eccyliopterus owenanus species	Animalia : Mollusca : Gastropoda : Lesueurillidae : Eccyliopterus : *Ophileta owenana*	460.9 - 449.5 Ma Ordovician
Lesueurilla beloitensis species	Animalia : Mollusca : Gastropoda : Lesueurillidae : Lesueurilla : *Eccyliopterus beloitensis*	460.9 - 449.5 Ma Ordovician
Maclurina bigsbyi species	Animalia : Mollusca : Gastropoda : Euomphalina : Macluritidae : Maclurina : *Maclurina bigsbyi*	460.9 - 449.5 Ma Ordovician
Maclurina manitobensis species	Animalia : Mollusca : Gastropoda : Euomphalina : Macluritidae : Maclurina : *Maclurina manitobensis*	460.9 - 449.5 Ma Ordovician
Maclurites crassa species	Animalia : Mollusca : Gastropoda : Euomphalina : Macluritidae : Maclurites : *Maclurites crassa*	460.9 - 449.5 Ma Ordovician
Maclurites cuneata species	Animalia : Mollusca : Gastropoda : Maclureadae : Maclurites : *Maclurea cuneata*	460.9 - 449.5 Ma Ordovician
Maclurites depressus species	Animalia : Mollusca : Gastropoda : Maclureadae : Maclurites : *Maclurea depressa*	460.9 - 449.5 Ma Ordovician
Maclurites nitidus species	Animalia : Mollusca : Gastropoda : Maclureadae : Maclurites : *Maclurea nitida*	460.9 - 449.5 Ma Ordovician
Maclurites subrotunda species	Animalia : Mollusca : Gastropoda : Maclureadae : Maclurites : *Maclurea subrotunda*	460.9 - 449.5 Ma Ordovician
Lytospira subrotunda species	Animalia : Mollusca : Gastropoda : Ophiletidae : Lytospira : *Eccyliomphalus subrotundus*	460.9 - 449.5 Ma Ordovician
Lytospira undulatus species	Animalia : Mollusca : Gastropoda : Ophiletidae : Lytospira : *Ecculiomphalus undulatus*	460.9 - 449.5 Ma Ordovician
Cyclonema aiens species	Animalia : Mollusca : Gastropoda : Euomphalina : Platyceratidae : Cyclonema : *Cyclonema aiens*	460.9 - 449.5 Ma Ordovician
Cyclonema percarinata species	Animalia : Mollusca : Gastropoda : Euomphalina : Platyceratidae : Cyclonema : *Cyclonema percarinata*	460.9 - 449.5 Ma Ordovician
Cyclonema textilis species	Animalia : Mollusca : Gastropoda : Euomphalina : Platyceratidae : Cyclonema : *Cyclonema textilis*	460.9 - 449.5 Ma Ordovician
Cyclonema varicosum species	Animalia : Mollusca : Gastropoda : Euomphalina : Platyceratidae : Cyclonema : *Cyclonema varicosum*	460.9 - 449.5 Ma Ordovician
Platyceras sp. genus	Animalia : Mollusca : Gastropoda : Platyceratidae : *Platyceras*	433.4 - 427.4 Ma Silurian
Raphistoma sp. genus	Animalia : Mollusca : Gastropoda : Raphistomatidae : *Raphistoma*	460.9 - 449.5 Ma Ordovician
Scalites peracutum species	Animalia : Mollusca : Gastropoda : Raphistomatidae : Scalites : *Raphistoma peracutum*	460.9 - 449.5 Ma Ordovician
Clathrospira conica species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Clathrospira : *Clathrospira conica*	460.9 - 449.5 Ma Ordovician
Clathrospira subconica species	Animalia : Mollusca : Gastropoda : Murchisoniina : Eotomariidae : Clathrospira : *Clathrospira subconica*	460.9 - 449.5 Ma Ordovician
Eotomaria sp. genus	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : *Eotomaria*	460.9 - 449.5 Ma Ordovician
Eotomaria dryope species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Eotomaria : *Pleurotomaria dryope*	460.9 - 449.5 Ma Ordovician
Eotomaria vicina species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Eotomaria : *Eotomaria vicina*	460.9 - 449.5 Ma Ordovician
Liospira americana species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Pleurotomaria americana*	460.9 - 449.5 Ma Ordovician
Liospira angustata species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Liospira angustata*	460.9 - 449.5 Ma Ordovician
Liospira micula species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Pleurotomaria micula*	460.9 - 449.5 Ma Ordovician
Liospira modesta species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Liospira modesta*	460.9 - 449.5 Ma Ordovician
Liospira obtusa species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Liospira obtusa*	460.9 - 449.5 Ma Ordovician
Liospira progne species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Pleurotomaria progne*	460.9 - 449.5 Ma Ordovician
Liospira vitruvia species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Liospira : *Pleurotomaria vitruvia*	460.9 - 449.5 Ma Ordovician
Paraliospira abrupta species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Paraliospira : *Liospira abrupta*	460.9 - 449.5 Ma Ordovician
Paraliospira supracingulata species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : Paraliospira : *Pleurotomaria supracingulata*	460.9 - 449.5 Ma Ordovician
Cataschisma convexum species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Gosseletinidae : Cataschisma : *Clathrospira convexa*	460.9 - 449.5 Ma Ordovician
Hormotoma gracilis species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Murchisoniidae : Murchisonia : *Murchisonia gracilis*	460.9 - 449.5 Ma Ordovician
Hormotoma gracilis angustatus subspecies	Animalia : Mollusca : Gastropoda : Murchisoniina : Hormotomidae : Hormotoma : *Hormotoma gracilis angustatus*	460.9 - 449.5 Ma Ordovician
Hormotoma minnesotensis species	Animalia : Mollusca : Gastropoda : Murchisoniina : Hormotomidae : Hormotoma : *Hormotoma minnesotensis*	460.9 - 449.5 Ma Ordovician
Hormotoma multivolvis species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Murchisoniidae : Murchisonia : *Murchisonia multivolvis*	460.9 - 449.5 Ma Ordovician
Hormotoma neglecta species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Sinuspiridae : Coelocaulus : *Coelocaulus neglectus*	460.9 - 449.5 Ma Ordovician
Hormotoma oehlerti species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Sinuspiridae : Coelocaulus : *Coelocaulus oehlerti*	460.9 - 449.5 Ma Ordovician
Hormotoma subangulata species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Murchisoniidae : Hormotoma : *Hormotoma subangulata*	460.9 - 449.5 Ma Ordovician
Omospira laticincta species	Animalia : Mollusca : Gastropoda : Loxonematidae : Omospira : *Omospira laticincta*	460.9 - 449.5 Ma Ordovician
Omospira trentonensis species	Animalia : Mollusca : Gastropoda : Loxonematidae : Omospira : *Hormotoma trentonensis*	460.9 - 449.5 Ma Ordovician
Cyrtostropha salteri species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Murchisoniidae : Hormotoma : *Hormotoma salteri*	460.9 - 449.5 Ma Ordovician
Brachytomaria semele species	Animalia : Mollusca : Gastropoda : Murchisoniina : Phanerotrematidae : Brachytomaria : *Brachytomaria semele*	460.9 - 449.5 Ma Ordovician
Daidia subconica species	Animalia : Mollusca : Gastropoda : Straparollinidae : Daidia : *Meekospira subconica*	460.9 - 449.5 Ma Ordovician
Cyrtospira wykoffensis species	Animalia : Mollusca : Gastropoda : Littorinimorpha : Calyptraeidae : Cyrtospira : *Cyrtospira wykoffensis*	460.9 - 449.5 Ma Ordovician
Eroicaspira bellicincta species	Animalia : Mollusca : Gastropoda : Subulitidae : Eroicaspira : *Murchisonia bellicincta*	460.9 - 449.5 Ma Ordovician
Fusispira angusta species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira angusta*	460.9 - 449.5 Ma Ordovician
Fusispira angusta subplana variety	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : Fusispira angusta : *Fusispira angusta subplana*	460.9 - 449.5 Ma Ordovician
Fusispira convexa species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira convexa*	460.9 - 449.5 Ma Ordovician
Fusispira inflata species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Subulites inflatus*	460.9 - 449.5 Ma Ordovician
Fusispira intermedia species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira intermedia*	460.9 - 449.5 Ma Ordovician
Fusispira nobilis species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira nobilis*	460.9 - 449.5 Ma Ordovician
Fusispira planulata species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira planulata*	460.9 - 449.5 Ma Ordovician
Fusispira spicula species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira spicula*	460.9 - 449.5 Ma Ordovician
Fusispira subbrevis species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira subbrevis*	460.9 - 449.5 Ma Ordovician
Fusispira subfusiformis species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Murchisonia subfusiformis*	460.9 - 449.5 Ma Ordovician
Fusispira ventricosa species	Animalia : Mollusca : Gastropoda : Subulitidae : Fusispira : *Fusispira ventricosa*	460.9 - 449.5 Ma Ordovician
Fusispira vittata species	Animalia : Mollusca : Gastropoda : Murchisoniina : Subulitidae : Fusispira : *Fusispira vittata*	460.9 - 449.5 Ma Ordovician
Subulites sp. genus	Animalia : Mollusca : Gastropoda : Subulitidae : *Subulites*	460.9 - 449.5 Ma Ordovician
Subulites conradi species	Animalia : Mollusca : Gastropoda : Subulitidae : Subulites : *Subulites conradi*	460.9 - 449.5 Ma Ordovician
Subulites dixonenesis species	Animalia : Mollusca : Gastropoda : Subulitidae : Subulites : *Subulites dixonenesis*	460.9 - 449.5 Ma Ordovician
Subulites elongatus species	Animalia : Mollusca : Gastropoda : Murchisoniina : Subulitidae : Subulites : *Subulites elongatus*	460.9 - 449.5 Ma Ordovician
Subulites pergracilis species	Animalia : Mollusca : Gastropoda : Subulitidae : Subulites : *Subulites pergracilis*	460.9 - 449.5 Ma Ordovician
Subulites regularis species	Animalia : Mollusca : Gastropoda : Subulitidae : Subulites : *Subulites regularis*	460.9 - 449.5 Ma Ordovician
Ectomaria prisca species	Animalia : Mollusca : Gastropoda : Lophospiridae : Ectomaria : *Ectomaria prisca*	460.9 - 449.5 Ma Ordovician
Eunema centralis species	Animalia : Mollusca : Gastropoda : Lophospiridae : Eunema : *Lophospira centralis*	460.9 - 449.5 Ma Ordovician
Eunema concinnula species	Animalia : Mollusca : Gastropoda : Lophospiridae : Eunema : *Lophospira concinnula*	460.9 - 449.5 Ma Ordovician
Eunema helicteres species	Animalia : Mollusca : Gastropoda : Lophospiridae : Eunema : *Murchisonia helicteres*	460.9 - 449.5 Ma Ordovician
Eunema quadrisulcata species	Animalia : Mollusca : Gastropoda : Lophospiridae : Eunema : *Lophospira quadrisulcata*	460.9 - 449.5 Ma Ordovician
Gyronema sp. genus	Animalia : Mollusca : Gastropoda : Holopeidae : *Gyronema*	460.9 - 449.5 Ma Ordovician
Gyronema pulchellum species	Animalia : Mollusca : Gastropoda : Holopeidae : Gyronema : *Gyronema pulchellum*	460.9 - 449.5 Ma Ordovician
Gyronema semicarinatum species	Animalia : Mollusca : Gastropoda : Holopeidae : Gyronema : *Cyclonema semicarinatum*	460.9 - 449.5 Ma Ordovician
Lophospira decursa species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Lophospira decursa*	460.9 - 449.5 Ma Ordovician
Lophospira major species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Lophospira major*	460.9 - 449.5 Ma Ordovician
Lophospira obliqua species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Lophospira obliqua*	460.9 - 449.5 Ma Ordovician
Lophospira perangulata species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Murchisonia perangulata*	460.9 - 449.5 Ma Ordovician
Lophospira serrulata species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Murchisonia serrulata*	460.9 - 449.5 Ma Ordovician
Lophospira spironema species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Lophospira spironema*	460.9 - 449.5 Ma Ordovician
Lophospira ventricosa species	Animalia : Mollusca : Gastropoda : Lophospiridae : Lophospira : *Murchisonia ventricosa*	460.9 - 449.5 Ma Ordovician
Paupospira burginensis species	Animalia : Mollusca : Gastropoda : Lophospiridae : Paupospira : *Paupospira burginensis*	460.9 - 449.5 Ma Ordovician
Paupospira elevata species	Animalia : Mollusca : Gastropoda : Lophospiridae : Paupospira : *Lophospira elevata*	460.9 - 449.5 Ma Ordovician
Paupospira oweni species	Animalia : Mollusca : Gastropoda : Lophospiridae : Paupospira : *Lophospira oweni*	460.9 - 449.5 Ma Ordovician
Paupospira sumnerensis species	Animalia : Mollusca : Gastropoda : Lophospiridae : Paupospira : *Murchisonia sumnerensis*	460.9 - 449.5 Ma Ordovician
Globonema niota species	Animalia : Mollusca : Gastropoda : Pleurotomariida : Pleurotomariidae : Pleurotomaria : *Pleurotomaria niota*	460.9 - 449.5 Ma Ordovician
Trochonema altum species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema altum*	460.9 - 449.5 Ma Ordovician
Trochonema beachi species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema beachi*	460.9 - 449.5 Ma Ordovician
Trochonema beloitense species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema beloitense*	460.9 - 449.5 Ma Ordovician
Trochonema fragile species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema fragile*	460.9 - 449.5 Ma Ordovician
Trochonema retrorsum species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema retrorsum*	460.9 - 449.5 Ma Ordovician
Trochonema rugosa species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema rugosa*	460.9 - 449.5 Ma Ordovician
Trochonema subcrassum species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema subcrassum*	460.9 - 449.5 Ma Ordovician
Trochonema umbilicata species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema umbilicata*	460.9 - 449.5 Ma Ordovician
Trochonema vagrans species	Animalia : Mollusca : Gastropoda : Trochonematidae : Trochonema : *Trochonema vagrans*	460.9 - 449.5 Ma Ordovician
Archinacella deleta species	Animalia : Mollusca : Tergomya : Archinacellida : Archinacellidae : Archinacella : *Archinacella deleta*	460.9 - 449.5 Ma Ordovician
Floripatella humilis species	Animalia : Mollusca : Tergomya : Archinacellida : Archinacellidae : Floripatella : *Floripatella humilis*	460.9 - 449.5 Ma Ordovician
Cyrtolites dilatus species	Animalia : Mollusca : Tergomya : Cyrtonellida : Cyrtolitidae : Cyrtolites : *Cyrtolites dilatus*	460.9 - 449.5 Ma Ordovician
Cyrtolites disjunctus species	Animalia : Mollusca : Tergomya : Cyrtonellida : Cyrtolitidae : Cyrtolites : *Cyrtolites disjunctus*	460.9 - 449.5 Ma Ordovician
Cyrtolites ornatus species	Animalia : Mollusca : Tergomya : Cyrtonellida : Cyrtolitidae : Cyrtolites : *Cyrtolites ornatus*	460.9 - 449.5 Ma Ordovician
Cyrtolites retrorsus species	Animalia : Mollusca : Tergomya : Cyrtonellida : Cyrtolitidae : Cyrtolites : *Cyrtolites retrorsus*	460.9 - 449.5 Ma Ordovician
Cyrtonellopsis vetulum species	Animalia : Mollusca : Tergomya : Cyrtonellida : Cyrtolitidae : Cyrtonellopsis : *Cyrtonellopsis vetulum*	460.9 - 449.5 Ma Ordovician
Scenella sp. genus	Animalia : Mollusca : Scenellidae : *Scenella*	460.9 - 449.5 Ma Ordovician
Scenella compressa species	Animalia : Mollusca : Scenellidae : Scenella : *Scenella compressa*	460.9 - 449.5 Ma Ordovician
Scenella obtusa species	Animalia : Mollusca : Tergomya : Scenellidae : Scenella : *Scenella obtusa*	460.9 - 449.5 Ma Ordovician
Helcionopsis depressum species	Animalia : Mollusca : Tergomya : Tryblidiida : Tryblidiidae : Helcionopsis : *Helcionopsis depressum*	460.9 - 449.5 Ma Ordovician
Helcionopsis wisconsinensis species	Animalia : Mollusca : Tergomya : Tryblidiida : Tryblidiidae : Helcionopsis : *Helcionopsis wisconsinensis*	460.9 - 449.5 Ma Ordovician
Tryblidium sp. genus	Animalia : Mollusca : Tergomya : Tryblidiida : Tryblidiidae : *Tryblidium*	460.9 - 449.5 Ma Ordovician
Tryblidium exserta species	Animalia : Mollusca : Tergomya : Tryblidiida : Tryblidiidae : Tryblidium : *Tryblidium exserta*	460.9 - 449.5 Ma Ordovician

References

Kolata D. R., Brower J. C., et al (1987) Upper Mississippi Valley Champlainian and Cincinnatian echinoderms, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, 179-181

Sloan R. E., Webers G. F. (1987) Stratigraphic ranges of Middle and Late Ordovician Gastropoda and Monoplacophora of Minnesota, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, 183-186

Catalani J. A. (1987) Biostratigraphy of the Middle and Late Ordovician cephalopods of the Upper Mississippi Valley area, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, 187-189

Frest T. J., Brett C. E., et al (1999) Caradocian-Gedinnian echinoderm associations of Central and Eastern North America, Paleocommunities--a case study from the Silurian and Lower Devonian, 638-783

Brower J. C. (1999) A New Pleurocystitid Rhombiferan Echinoderm from the Middle Ordovician Galena Group of Northern Iowa and Southern Minnesota, Journal of Paleontology 73 1, 129-153

Wagner P. J. (2017) Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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