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

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

• coordinate estimated from map

• basin-level geographic resolution

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

• member-level stratigraphic resolution

Environment/lithology: limestone

• Environmental call by T. Hanson.
• Limestone, argillaceous streaked. 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 23474: 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
unclassified
  -
"Dendrocrinid" sp. n. sp.
"Dendrocrinid" sp. n. sp.
Dendrocrinid n. gen n. sp.
Edrioasteroidea
 Edrioasterida - Edrioasteridae
Edrioaster bigsbyi
Edrioaster bigsbyi Billings 1858
Crinoidea
 Diplobathrida - Dimerocrinitidae
Ptychocrinus sp.
Ptychocrinus sp. Wachsmuth and Springer 1885 Sea lily
 Diplobathrida - Cleiocrinidae
Cleiocrinus sp.
Cleiocrinus sp. Billings 1857 Sea lily
 Monobathrida - Glyptocrinidae
Pycnocrinus sp., Abludoglyptocrinus spp.
Pycnocrinus sp. Miller 1883 Sea lily
Abludoglyptocrinus spp. Kolata 1982 Sea lily
 Calceocrinida - Calceocrinidae
Cremacrinus crossmani, Cremacrinus guttenbergensis
Cremacrinus guttenbergensis Kolata 1975 Sea lily
 Homocrinida - Homocrinidae
Ectenocrinus simplex
Ectenocrinus simplex Hall 1847 Sea lily
 Porocrinida -
Carabocrinus sp.
Carabocrinus sp. Billings 1857 Sea lily
 Dendrocrinida - Dendrocrinidae
Dendrocrinus aff. acutidactylus
Dendrocrinus aff. acutidactylus Billings 1859 Sea lily
 Flexibilia - Cupulocrinidae
Quienquecaudex springeri, Cupulocrinus aff. conjugans, Cupulocrinus aff. gracilis
Quienquecaudex springeri Kolata 1975 Sea lily