Where: Delta County, Michigan (45.7° N, 87.0° W: paleocoordinates 19.5° S, 55.4° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Amorphognathus ordovicicus conodont zone, Bay de Noc Member (Stonington Formation), Richmondian (449.6 - 445.5 Ma)
• Richmond Formation, Stonington beds, Bay de Noe "member" of beds.
• group of beds-level stratigraphic resolution
Environment/lithology: gray, argillaceous limestone
Size class: macrofossils
Primary reference: R. C. Hussey. 1926. The Richmond Formation of Michigan. In E. S. McCartney (ed.), Michigan University Contributions from the Museum of Geology 2:113-188 [S. Holland/T. Hanson/S. Bruning]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 26312: authorized by Steven Holland, entered by Tori Hanson on 11.10.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Anthozoa | |
"Streptelasma rusticum" = Helicelasma rusticum Billings 1858 horn coral
Streptelasma huronensis horn coral
Streptelasma divaricans Nicholson 1875 horn coral | |
Scyphozoa | |
Conularia formosa jellyfish
Conularia sp. jellyfish | |
Gastropoda | |
Bellerophontoidea indet. M'Coy 1851 snail | |
Sinuites sp. Koken 1896 snail | |
Phragmolites slawsoni Hussey 1926 snail | |
"Cyclora minuta" = Cyclonema minuta
"Cyclora minuta" = Cyclonema minuta Hall 1845 snail | |
Bivalvia | |
"Psiloconcha sp." = Cymatonota, "Whiteavesia pholadiformis" = Pholadomorpha pholadiformis, Modiolopsis valida
"Psiloconcha sp." = Cymatonota Ulrich 1893 clam
"Whiteavesia pholadiformis" = Pholadomorpha pholadiformis Hall 1851 clam
Modiolopsis valida clam | |
Anomalodonta cf. gigantea Miller 1874 clam
"Byssonychia carinata" = Ambonychia clam
Byssonychia richmondensis Ulrich 1893 clam | |
Pterinea aff. insueta oyster
Pterinea (Caritodens) demissa Conrad 1842 oyster | |
Cephalopoda | |
Endoceras sp. Hall 1847 | |
Strophomenata | |
Strophomena parvula, Strophomena vetusta, Strophomena cf. nutans, Strophomena huronensis, "Strophomena neglecta" = Tetraphalerella neglecta
Strophomena parvula Foerste 1917
Strophomena vetusta James 1874
Strophomena cf. nutans Hall and Clarke 1892
Strophomena huronensis Foerste 1912
"Strophomena neglecta" = Tetraphalerella neglecta James 1891 | |
"Rafinesquina breviusculus" = Megamyonia breviuscula
"Rafinesquina breviusculus" = Megamyonia breviuscula Foerste 1917 | |
Rafinesquina alternata Conrad 1838 | |
Rhynchonellata | |
"Dinorthis (Plaesiomys) subquadrata" = Plaesiomys subquadratus
"Dinorthis (Plaesiomys) subquadrata" = Plaesiomys subquadratus Hall 1847 | |
"Platystrophia annieana" = Vinlandostrophia annieana, "Platystrophia moritura" = Vinlandostrophia moritura, Platystrophia spp., Platystrophia aff. cypha, Platystrophia acutilirata, Platystrophia clarksvillensis
"Platystrophia annieana" = Vinlandostrophia annieana Foerste 1910
"Platystrophia moritura" = Vinlandostrophia moritura Cumings 1908
Platystrophia spp. King 1850
Platystrophia aff. cypha James 1874
Platystrophia acutilirata Conrad 1842
Platystrophia clarksvillensis Foerste 1910 | |
Hebertella occidentalis Hall 1847
Hebertella alveata Foerste 1909 | |
| |
"Zygospira recurvirostris" = Anazyga recurvirostra
| |
Craniata | |
"Crania scabiosa" = Petrocrania scabiosa
"Crania scabiosa" = Petrocrania scabiosa Hall 1866 | |
Stenolaemata | |
"Proboscina auloporoides" = Tubulotrypa auloporoides
"Proboscina auloporoides" = Tubulotrypa auloporoides Nicholson 1875 | |
Rhombotrypa quadrata Rominger 1866 | |
Stigmatella sp. Ulrich and Bassler 1906 | |
Trilobita | |
Ceraurus simmonsi trilobite |