Pecatonica Formation 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: Pecatonica Formation (Platteville Group), Blackriveran (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone

• Lithology and environment taken from Kolata, D. R. "Lithostratigraphy of the Plateville, Galena and Maquoketa Groups in Northern Illinois." Middle and Late Ordovician Lithostratigraphy and Biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p. 21-24. R. E. Sloan, ed.

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 23434: authorized by Steven Holland, entered by Tori Hanson on 15.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
 Rhombifera - Cheirocrinidae
Cheirocrinus sp., Coronocystis durandensis
Cheirocrinus sp. Eichwald 1856
 Rhombifera - Pleurocystitidae
Praepleurocystis sp.
Echinoidea
 Bothriocidaroida -
Neobothriocidaris sp.
 Bothriocidaroida - Bothriocidaridae
Bothriocidaris solemi
Asteroidea
 Hadrosida - Hudsonasteridae
Hudsonaster aff. rugosus
Hudsonaster aff. rugosus Billings 1857 sea star
Cyclocystoidea
  - Cyclocystoididae
Cyclocystoides sp., Cyclocystoides halli
Cyclocystoides sp. Salter and Billings 1858
Cyclocystoides halli Billings 1858