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

Where: Illinois, Iowa (42.0° N, 90.5° W: paleocoordinates 20.7° S, 60.0° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Brainard Shale Formation (Maquoketa Group), Richmondian (449.6 - 445.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: poorly lithified, blue shale

• Environmental call by T. Hanson.
• Greenish-blue to bluish-gray soft shale. Lithology from 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 23534: authorized by Steven Holland, entered by Tori Hanson on 16.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
"Dendrocystitid" sp., Enopleura weatherbyi
"Dendrocystitid" sp.
undescribed dendrocystitid
Echinoidea
 Bothriocidaroida - Bothriocidaridae
Bothriocidaris maquoketensis
Stylophora
 Mitrata -
Diamphidiocystis sp.
Edrioasteroidea
 Pentacystida - Steganoblastidae
Astrocystites aff. ottawaensis
 Edrioasterida - Rhenopyrgidae
Rhenopyrgus sp.
Rhenopyrgus sp. Dehm 1961
Soluta
 Syringocrinida - Iowacystidae
Iowacystis sagittaria
Crinoidea
 Flexibilia - Cupulocrinidae
Cupulocrinus angustatus, Cupulocrinus aff. angustatus, Cupulocrinus sp.
Cupulocrinus sp. d'Orbigny 1849 Sea lily
 Porocrinida -
Porocrinus crassus, Carabocrinus slocomi
 Dendrocrinida - Dendrocrinidae
Dendrocrinus curvijunctus, Dendrocrinus kayi, Dendrocrinus aff. curvijunctus
 Cladida - Plicodendrocrinidae
"Dendrocrinus casei" = Plicodendrocrinus casei
"Dendrocrinus casei" = Plicodendrocrinus casei Meek 1871 Sea lily
 Homocrinida - Homocrinidae
Sygcaulocrinus typus
Sygcaulocrinus typus Ulrich 1925 Sea lily
 Diplobathrida - Rhodocrinitidae
aff. Trichinocrinus sp.
aff. Trichinocrinus sp. Moore and Laudon 1943 Sea lily
new genus aff. Trichinocrinus sp.
 Monobathrida - Xenocrinidae
Xenocrinus sp.
Xenocrinus sp. Miller 1881 Sea lily
 Rhombifera - Callocystitidae
Anartiocystis sp.
Anartiocystis sp. Ausich and Schumacher 1984
Cyclocystoidea
  - Cyclocystoididae
Cyclocystoides sp.
Cyclocystoides sp. Salter and Billings 1858