Where: Minnesota (44.0° N, 92.0° W: paleocoordinates 19.1° S, 62.9° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Decorah Shale Formation, Rocklandian to Rocklandian (457.3 - 449.6 Ma)
• formation-level stratigraphic resolution
Environment/lithology: gray shale
Size class: macrofossils
Primary reference: D. R. Kolata, J. C. Brower, and T. J. Frest. 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 [S. Holland/T. Hanson/T. Hanson]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23402: authorized by Steven Holland, entered by Tori Hanson on 14.07.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Asteroidea | |
"Promopalaeaster wilsoni" = Pegoasterella pompom
"Promopalaeaster wilsoni" = Pegoasterella pompom Blake and Koniecki 2020 sea star | |
Pleurocystites squamosus Billings 1874
Amecystis woodi Broadhead and Strimple 1975 | |
Crinoidea | |
Periglyptocrinus spinuliferus, Glyptocrinus sp., Glyptocrinus tridactylus, Pycnocrinus gerki, Pycnocrinus multibrachialis, Pycnocrinus sardesoni
Periglyptocrinus spinuliferus Sea lily
Glyptocrinus sp. Hall 1847 Sea lily
Glyptocrinus tridactylus Sea lily
Pycnocrinus gerki Sea lily
Pycnocrinus multibrachialis Sea lily
Pycnocrinus sardesoni Sea lily | |
Archaeocrinus sp. Wachsmuth and Springer 1881 Sea lily | |
Reteocrinus rocktonensis Sea lily | |
Cupulocrinus canaliculatus Sea lily
Cupulocrinus jewetti Sea lily
Cupulocrinus levorsoni Sea lily
Cupulocrinus humilis Billings 1857 Sea lily | |
Porocrinus elegans Sea lily
Porocrinus pentagonius Sea lily
Carabocrinus dicyclicus Sea lily
Carabocrinus magnificus Sea lily | |
Dendrocrinus sp. Hall 1852 Sea lily | |
Cremacrinus punctatus Sea lily
Cremacrinus guttenbergensis Kolata 1975 Sea lily | |
"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus
"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus Warn and Strimple 1977 Sea lily | |
Edrioasteroidea | |
Pyrgocystis sardesoni Bather 1915 | |
Agelacrinites sp. Vanuxem 1842 | |
Stylophora | |
Cyclocystoidea | |
Cyclocystoides sp. Salter and Billings 1858 |