Arnheim - type Cincinnatian (Ordovician of the United States)
Where: Ohio (39.0° N, 84.0° W)
• Paleocoordinates: 25.5° S, 112.0° W (Wright 2013)
• basin-level geographic resolution
When: Amorphognathus superbus conodont zone, Arnheim Formation, Richmondian (449.6 - 445.5 Ma)
• Richmondian; Includes collections from both Sunset and Oregonia Members of Arnheim Formation. Sunset includes two distinct facies, one was deposited in a deep subtidal ramp environment and the other was deposited in a shallow subtidal environment. Oregonia was deposited in a shallow subtidal environment.
• formation-level stratigraphic resolution
Environment/lithology: bioturbated, phosphatic, argillaceous packstone and mudstone
• Geological information from field notes of S.M. Holland
• oregonia member of arnheim consists of nodular to very thinly and wavy bedded skeletal phosphatic packstones and grainstones, interbedded with mudstone. kentucky facies of sunset consists of medium to thin bedded skeletal wackestones to packstones interbedded with very thin beds of mudstone. ohio/indiana facies of sunset member consists of roughly even proportions of thin-bedded mudstone and thin to medium bedded skeletal packstone to grainstone.
Size classes: macrofossils, mesofossils
Preservation: original calcite, replaced with phosphate
Primary reference: E. Dalve. 1948. The fossil fauna of the Ordovician in the Cincinnati Region. University Museum, Department of Geology and Geography, University of Cincinnati 1-56 [S. Holland/S. Holland/J. Ju]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 5326: authorized by Steven Holland, entered by Steven Holland on 23.09.1999
Creative Commons license: CC0 (CC0)
Taxonomic list
Show authors, comments, and common names
| unclassified | |
| Buthotrephis gracilis | |
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| Chlorophyceae | |
| Protozoa | |
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Beatricea undulata Billings 1857 radiolarian | |
| Stromatoporoidea | |
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Dermatostroma scabrum stromatoporoid sponge | |
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Beatricea nodulosa Billings 1857 stromatoporoid sponge | |
| Anthozoa | |
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Columnaria calicina Nicholson 1874 horn coral | |
| Scyphozoa | |
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Conularia formosa jellyfish | |
| Coleolus | |
| Pterobranchia | |
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Mastigograptus strictus graptolite | |
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Diplograptus recurrens graptolite
Diplograptus sp. graptolite | |
| Cyclocystoidea | |
"Cyclocystoides magnus" = Zygocycloides magnus, "Cyclocystoides minus" = Zygocycloides magnus
"Cyclocystoides magnus" = Zygocycloides magnus Miller and Dyer 1878
"Cyclocystoides minus" = Zygocycloides magnus Miller and Dyer 1878 | |
| Edrioasteroidea | |
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Streptaster vorticellatus Hall 1866 | |
| Crinoidea | |
"Glyptocrinus richardsoni" = Canistrocrinus richardsoni
"Glyptocrinus richardsoni" = Canistrocrinus richardsoni Wetherby 1880 Sea lily | |
| Asteroidea | |
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Hudsonaster incomptus Meek 1872 sea star | |
"Urasterella grandis" = Salteraster grandis
"Urasterella grandis" = Salteraster grandis Meek 1872 sea star | |
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Promopalaeaster granulosus Hall 1868 sea star
Promopalaeaster wykoffi Miller and Gurley 1897 sea star | |
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Mesopalaeaster wilberanus Meek and Worthen 1862 sea star | |
"Petraster speciosus" = Jugiaster speciosus
"Petraster speciosus" = Jugiaster speciosus Miller and Dyer 1878 sea star | |
| Tentaculita | |
| Craniata | |
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Petrocrania scabiosa Hall 1866 | |
| Rhynchonellata | |
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Zygospira modesta Hall 1847 | |
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Dinorthis carleyi Hall 1860 | |
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Hebertella occidentalis Hall 1847 | |
Platystrophia wallowayi, Platystrophia ponderosa, Platystrophia cypha, "Platystrophia foerstei" = Vinlandostrophia foerstei
Platystrophia ponderosa Foerste 1909
Platystrophia cypha James 1874
"Platystrophia foerstei" = Vinlandostrophia foerstei McEwan 1919 | |
"Dalmanella meeki" = Cincinnetina meeki
"Dalmanella meeki" = Cincinnetina meeki Miller 1875 | |
"Rhynchotrema capax" = Hiscobeccus capax
"Rhynchotrema capax" = Hiscobeccus capax Conrad 1842 | |
| Strophomenata | |
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Strophomena concordensis Foerste 1909
Strophomena planumbona Hall 1847 | |
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Rafinesquina alternata Conrad 1838
Leptaena richmondensis Foerste 1909 | |
| Lingulata | |
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Trematis millepunctata Hall 1875 | |
| Stenolaemata | |
"Proboscina auloporoides" = Tubulotrypa auloporoides, "Proboscina frondosa" = Tubulotrypa auloporoides
"Proboscina auloporoides" = Tubulotrypa auloporoides Nicholson 1875
"Proboscina frondosa" = Tubulotrypa auloporoides Nicholson 1875 | |
|
Corynotrypa inflata Nicholson 1875
Corynotrypa delicatula James 1878 | |
|
"Petigopora offfula" = Dekayia
Stigmatella crenulata Ulrich and Bassler 1906 | |
"Dicranopora emacerata" = Stictopora emacerata
"Dicranopora emacerata" = Stictopora emacerata Nicholson 1875 | |
| Hyolitha | |
| Tergomya | |
Cyrtolites ornatus, "Microceras inornatum" = Cyrtolites inornatum
Cyrtolites ornatus Conrad 1838
"Microceras inornatum" = Cyrtolites inornatum Hall 1845 | |
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Archinacella rugatina Ulrich and Scofield 1897 | |
| Gastropoda | |
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"Cyclora minuta" = Cyclonema minuta Hall 1845 snail
Cyclonema bilix Conrad 1842 snail
Cyclonema humerosum Ulrich and Scofield 1897 snail | |
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Cyclora depressa snail
Cyclora hoffmani snail
Cyclora pulcella snail
Cyclora parvula Hall 1845 snail | |
"Sinuites cancellata" = Sinuites cancellatus
"Sinuites cancellata" = Sinuites cancellatus Hall 1847 snail | |
"Lophospira bowdeni" = Paupospira bowdeni, "Lophospira tropidophora" = Paupospira tropidophora, "Lophospira bicincta" = Lophospira milleri, "Lophospira pulchella" = Lophospira perangulata
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail
"Lophospira tropidophora" = Paupospira tropidophora Meek 1873 snail
"Lophospira bicincta" = Lophospira milleri Miller 1877 snail
"Lophospira pulchella" = Lophospira perangulata Hall 1847 snail | |
"Liospira rugata" = Paraliospira rugata
"Liospira rugata" = Paraliospira rugata Ulrich and Scofield 1897 snail | |
| Cephalopoda | |
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Endoceras sp. Hall 1847 | |
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Treptoceras spp. Flower 1942 | |
| Bivalvia | |
Cymatonota constricta, Cymatonota cylindrica, Modiolopsis capax, Modiolodon subovalis, Orthodesma canaliculatum
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Rhytimya faberi clam
Rhytimya lunulata clam | |
Anomalodonta costata, "Opisthoptera concordensis" = Maryonychia concordensis, Byssonychia radiata, "Anomalodonta alata" = Ambonychia alata
Anomalodonta costata clam
"Opisthoptera concordensis" = Maryonychia concordensis Foerste 1910 clam
Byssonychia radiata Hall 1847 clam
"Anomalodonta alata" = Ambonychia alata Meek 1872 clam | |
"Caritodens demissa" = Pterinea demissa
"Caritodens demissa" = Pterinea demissa Conrad 1842 oyster | |
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Cyrtodonta halli clam | |
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Ctenodonta recurva clam
Ctenodonta madisonensis Ulrich 1894 clam | |
"Ctenodonta cingulata" = Nucularca cingulata
"Ctenodonta cingulata" = Nucularca cingulata Ulrich 1879 clam | |
| Polychaeta | |
| Ostracoda | |
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Aechmina richmondensis ostracod | |
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Aparchites minutissimus ostracod
Aparchites oblongus ostracod | |
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Primitia cincinnatiensis ostracod | |
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Ctenobolbina hammeli ostracod | |
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Bythocypris cylindrica Hall 1871 ostracod | |
| Artiopoda | |
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Ceraurinus icarus Billings 1860 trilobite | |
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Flexicalymene meeki Foerste 1910 trilobite | |
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Isotelus maximus Locke 1838 trilobite
Isotelus megistos Locke 1842 trilobite | |
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Rusophycus biloba Vanuxem 1842
Arthraria biclavata Miller 1875 | |