Where: Iowa (42.5° N, 91.5° W)
• Paleocoordinates: 26.1° S, 106.3° W (Wright 2013)
• coordinate estimated from map
• local area-level geographic resolution
When: Farmers Creek Member (Hopkinton Formation), Llandovery (443.4 - 433.4 Ma)
• upper portion of F.C. Member. Late Llandovery (C4).
• member-level stratigraphic resolution
Environment/lithology: deep subtidal ramp; dolomitic, shelly/skeletal wackestone and dolomitic, shelly/skeletal packstone
Collection methods: Echinoderm abundances given in table 45.23.
Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 26713: authorized by Michael Foote, entered by Michael Foote on 25.10.2002
Creative Commons license: CC0 (CC0)
Taxonomic list
Gomphocystites sp. Hall 1864 | |
Crinoidea | |
Krinocrinus inflatus, Macrostylocrinus "sp. D Witzke and Strimple", Macrostylocrinus "sp. E Witzke and Strimple"
Krinocrinus inflatus Sea lily | |
Carpocrinus bodei Sea lily | |
Dimerocrinites (Eudimerocrinites) sp. Phillips 1839 Sea lily | |
Rhynchonellata | |
"Platystrophia biforata" = Platystrophia biforatus
"Platystrophia biforata" = Platystrophia biforatus Schlotheim 1820 | |
Atrypa reticularis Linnaeus 1758 | |
Pentamerus oblongus de Sowerby 1839
Harpidium (Isovella) sp. Breyvel and Breyvel 1970 | |
Strophomenata | |
Leptaena rhomboidalis Wahlenberg 1818 |