Stewartville Formation Echinoderms of the Upper Mississippi Valley (Ordovician 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: Stewartville Formation, Edenian (451.0 - 450.2 Ma)

• formation-level stratigraphic resolution

Environment/lithology: gray wackestone

• Environmental call by T. Hanson
• Lithology from   F. M. Swain. 1987. Middle and Upper Ordovician Ostracoda of Minnesota and Iowa. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 :99-101.

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 23405: authorized by Steven Holland, entered by Tori Hanson on 14.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Edrioasteroidea
 Edrioasterida - Edrioasteridae
Edrioaster bigsbyi Billings 1858
 Pentacystida - Steganoblastidae
Astrocystites sp. Whiteaves 1897
Cyclocystoidea
  - Cyclocystoididae
Cyclocystoides spp. Salter and Billings 1858
Actinodiscus sp. Smith and Paul 1982
Crinoidea
 Diplobathrida - Rhodocrinitidae
Rhaphanocrinus sp. Wachsmuth and Springer 1885 crinoid
 Flexibilia - Cupulocrinidae
Cupulocrinus sp. d'Orbigny 1849 Sea lily
Quienquecaudex springeri Kolata 1975 Sea lily
 Porocrinida -
Porocrinus sp. Billings 1857 Sea lily
Carabocrinus sp. Billings 1857 Sea lily
Carabocrinus radiatus Billings 1857 Sea lily
 Calceocrinida - Calceocrinidae
 Homocrinida - Homocrinidae
Ectenocrinus simplex Hall 1847 Sea lily
 Inadunata - Merocrinidae
Merocrinus sp. Walcott 1884 Sea lily
 Glyptosphaeritida - Eumorphocystidae
Soluta
 Syringocrinida - Iowacystidae
 Rhombifera - Glyptocystidae
Tanaocystis sp. Sprinkle 1982
 Rhombifera - Pleurocystitidae
Amecystis sp. Ulrich and Kirk 1921
Asteroidea
 Euaxosida - Palasterinidae
Schuchertia sp. Gregory 1899 sea star
 Hadrosida - Promopalaeasteridae
Promopalaeaster sp. Schuchert 1914 sea star
 Hadrosida - Hudsonasteridae
Hudsonaster sp. Stürtz 1899 sea star