Where: Rock Island County, Illinois (42.0° N, 91.0° W: paleocoordinates 33.8° S, 36.8° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Rapid Member (Little Cedar Formation), Givetian (387.7 - 382.7 Ma)
• bed-level stratigraphic resolution
Environment/lithology: deep subtidal shelf; lithified, shelly/skeletal, argillaceous, calcareous wackestone
Size classes: macrofossils, mesofossils
Collection methods: Basal Solon Member trilobite cluster; three closely-spaced locations but sampled a single bed: therefore setting as pooled samples
Primary reference: W. J. Hickerson. 1997. Middle Devonian (Givetian) trilobite clusters from eastern Iowa and northwestern Illinois. In C. E. Brett, G. C. Baird (eds.), Paleontological Events: Stratigraphic, Ecological, and Evolutionary Implications 224-246 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 76641: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 27.11.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Anthozoa | |
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Rugosa indet. horn coral | |
Heteractinida | |
"Astraeospongia sp." = Astraeospongium
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Gnathostomata | |
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Crinoidea | |
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Gastropoda | |
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Cephalopoda | |
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Strophomenata | |
"Strophodonta sp." = Strophomena (Strophodonta)
"Strophodonta sp." = Strophomena (Strophodonta) Hall 1852 | |
Protoleptostrophia sp. Caster 1939 | |
Rhynchonellata | |
Schizophoria sp. King 1850 | |
Orthospirifer sp. Pitrat 1975 | |
Tylothyris sp. North 1920 | |
"Neatrypa sp." = Devonatrypa, Spinatrypa sp.
"Neatrypa sp." = Devonatrypa Rzhonsnitskaya 1964
Spinatrypa sp. Stainbrook 1951 | |
Bryozoa | |
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Trilobita | |
Crassiproetus occidens Hall 1861 trilobite | |
"Phacops norwoodensis" = Phacops rana norwoodensis
"Phacops norwoodensis" = Phacops rana norwoodensis Stumm 1953 trilobite | |
Greenops sp. Delo 1935 trilobite |