Decorah Shale Echinoderms, Upper Mississippi Valley (Ordovician to of the United States)

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

• Environmental call by T. Hanson.
• "[G]reenish-gray to pale-olive fossiliferous shale or claystone with lenses and think beds of coquinoidal limestone and calcareous shale." Lithology from W. F. Rice. 1987. The systematics and biostratigraphy of the Brachiopoda of the Decorah Shale at St. Paul, Minnesota. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :136-166.

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

Show authors, comments, and common names
unclassified
  -
Grenprisa billingsi, Paleocrinus angulatus
Asteroidea
 Hadrosida - Urasterellidae
"Promopalaeaster wilsoni" = Pegoasterella pompom
"Promopalaeaster wilsoni" = Pegoasterella pompom Blake and Koniecki 2020 sea star
Edrioasteroidea
 Isorophida - Agelacrinitidae
Agelacrinites sp.
Agelacrinites sp. Vanuxem 1842
  - Pyrgocystidae
Pyrgocystis sardesoni
  - Hemicystitidae
Hemicystites curtus, Hemicystites paulianus
 Rhombifera - Pleurocystitidae
Amecystis woodi, Pleurocystites squamosus
Amecystis woodi Broadhead and Strimple 1975
Pleurocystites squamosus Billings 1874
Crinoidea
 Homocrinida - Cincinnaticrinidae
"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus
"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus Warn and Strimple 1977 Sea lily
 Calceocrinida - Calceocrinidae
Cremacrinus punctatus, Cremacrinus guttenbergensis
Cremacrinus guttenbergensis Kolata 1975 Sea lily
 Dendrocrinida - Dendrocrinidae
Dendrocrinus sp.
Dendrocrinus sp. Hall 1852 Sea lily
 Flexibilia - Cupulocrinidae
Cupulocrinus canaliculatus, Cupulocrinus jewetti, Cupulocrinus levorsoni, Cupulocrinus humilis
Cupulocrinus humilis Billings 1857 Sea lily
 Porocrinida -
Porocrinus elegans, Porocrinus pentagonius, Carabocrinus dicyclicus, Carabocrinus magnificus
 Diplobathrida - Rhodocrinitidae
Archaeocrinus sp.
Archaeocrinus sp. Wachsmuth and Springer 1881 Sea lily
 Monobathrida - Glyptocrinidae
Glyptocrinus sp., Glyptocrinus tridactylus, Pycnocrinus gerki, Pycnocrinus multibrachialis, Pycnocrinus sardesoni, Periglyptocrinus spinuliferus
Glyptocrinus sp. Hall 1847 Sea lily
 Camerata - Reteocrinidae
Reteocrinus rocktonensis
Cyclocystoidea
  - Cyclocystoididae
Cyclocystoides sp.
Cyclocystoides sp. Salter and Billings 1858
Stylophora
 Mitrata -
Willmanocystis denticulatus, Ateleocystites guttenbergensis