Midriver Marina & Conlkin Quarries. Cranaena Fauna (Devonian of the United States)

Also known as Brachiopods of Cou Falls Mbr., Coralville Fm., Eastern Iowa

Where: Iowa (42.5° N, 92.0° W: paleocoordinates 33.4° S, 37.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Cou Falls Member (Coralville Formation), Late/Upper Givetian (388.1 - 383.7 Ma)

• Late Givetian, Strophodonta plicata Zone.

• member-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal limestone

• Correlative with Gizzard Creek Mbr., which is said to be transgressive.
• Member is indicated on stratigraphic column as consisting of limestone with brachiopods, molluscs, echinoderms, corals, and stromatoporoids.

Size classes: macrofossils, mesofossils

Primary reference: J. Day. 1988. The brachiopod succession of the Late Givetian-Frasnian of Iowa. In N. J. McMillan, A. F. Embry, and D. J. Glass (eds.), Devonian of the World, Volume III. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada 303-325 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 35480: authorized by Michael Foote, entered by Michael Foote on 17.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Strophodontidae
 Productida - Productellidae
? Productella belanskii Stainbrook 1943
 Orthotetida - Areostrophiidae
"Schuchertella iowensis" = Floweria iowensis
"Schuchertella iowensis" = Floweria iowensis Stainbrook 1943
Rhynchonellata
 Spiriferida - Spinocyrtiidae
 Spiriferida - Elythidae
 Spiriferida - Mucrospiriferidae
 Spiriferinida - Cyrtinidae
 Athyridida - Athyrididae
 Rhynchonellida - Stenoscismatidae
Atribonium subovata Savage 1921
 Pentamerida - Clorindidae
 Terebratulida - Cranaenidae
 Orthida - Schizophoriidae
Schizophoria lata Stainbrook 1940
 Atrypida - Atrypidae
Desquamatia waterlooensis, "Independatrypa independensis" = Desquamatia (Independatrypa)
"Independatrypa independensis" = Desquamatia (Independatrypa)