Dunleith Formation, Wyota Member Echinoderms, Upper Mississippi Valley (Ordovician of the United States)

Where: Illinois, Iowa (42.0° N, 90.5° W: paleocoordinates 21.3° S, 63.6° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Wyota Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: cherty/siliceous limestone

• Environmental call by T. Hanson.
• Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan.

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 23486: authorized by Steven Holland, entered by Tori Hanson on 15.07.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
"Cincinnaticrinid" sp.
undescribed cincinnaticrinid
Edrioasteroidea
 Edrioasterida - Edrioasteridae
Edrioaster bigsbyi Billings 1858
Soluta
 Syringocrinida - Iowacystidae
 Rhombifera - Glyptocystidae
Tanaocystis sp. Sprinkle 1982
 Rhombifera - Pleurocystitidae
 Rhombifera - Glyptocystitidae
Glyptocystites sp. Billings 1854
Paracrinoidea
 Comarocystitida - Amygdalocystitidae
Amygdalocystites sp. Billings 1854
Crinoidea
 Diplobathrida - Dimerocrinitidae
Ptychocrinus sp. Wachsmuth and Springer 1885 Sea lily
 Monobathrida - Glyptocrinidae
Pycnocrinus sp. Miller 1883 Sea lily
Glyptocrinus sp. Hall 1847 Sea lily
Glyptocrinus aff. ornatus Billings 1857 Sea lily
 Flexibilia - Cupulocrinidae
 Hybocrinida - Hybocrinidae
Hybocrinus conicus Billings 1857 Sea lily
 Calceocrinida - Calceocrinidae
Asteroidea
 Hadrosida - Hudsonasteridae
Hudsonaster sp. Stürtz 1899 sea star
 Hadrosida - Promopalaeasteridae
Promopalaeaster sp. Schuchert 1914 sea star
 Euaxosida - Palasterinidae
Schuchertia sp. Gregory 1899 sea star
Cyclocystoidea
  - Cyclocystoididae