Eurypterid-associated fauna of Wilhelmi Fmn. at Essex, Illinois: Llandovery, Illinois

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Conularida indet.
Eurypterida - Onychopterellidae
? Onychopterella pumilis
"According to E. Kjellesvig-Waering (oral comm., 1979) this may be a Drepanopterus."
Trilobita
Trilobita indet. Walch 1771
Tentaculita - Cornulitida - Cornulitidae
Cornulites sp. Schlotheim 1820
Gastropoda
Gastropoda indet. Cuvier 1795
Bivalvia
Bivalvia indet. Linnaeus 1758
Tentaculitida
Tentaculitida indet. Ljaschenko 1955
Rhynchonellata - Athyridida - Rhynchospirinidae
Homoeospira sp. Hall and Clarke 1893
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella sp. Hall and Clarke 1893
Rhynchonellata - Orthida - Plectorthidae
Hebertella sp. Hall and Clarke 1892
Rhynchonellata - Orthida - Rhipidomellidae
Rhipidomella sp.
Given as "Rhipidomella"
Rhynchonellata - Orthida - Dalmanellidae
Dalmanella sp. Hall and Clarke 1892
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rhynchotreta sp. Hall 1879
Rhynchonellata - Rhynchonellida - Rhynchonellidae
Rhynchonella sp. Fischer 1809
Given as "Rhynchonella"
Rhynchonellata - Rhynchonellida - Camarotoechiidae
Camarotoechia sp. Hall and Clarke 1893
Rhynchonellata - Pentamerida - Gypidulidae
Gypidula sp. Hall 1867
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
Craniata - Craniopsida - Craniopsidae
Craniops sp. Hall 1859
Anthozoa
Anthozoa indet. Ehrenberg 1834
see common names

Geography
Country:United States State/province:Illinois
Coordinates: 41.2° North, 88.2° West (view map)
Paleocoordinates:22.2° South, 55.4° West
Basis of coordinate:based on nearby landmark
Time
Period:Silurian Epoch:Llandovery
10 m.y. bin:Silurian 1
*Epoch:Early/Lower Llandovery
Key time interval:Llandovery
Age range of interval:443.80000 - 433.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Wilhelmi
Lithology and environment
Primary lithology: argillaceous dolomite
Lithology description: "Dolomite, commonly argillaceous"
Environment:open shallow subtidal Tectonic setting:cratonic basin
Geology comments: "The formation is considered to be peritidal by Droste & Shaver (1983) [Ind. G.S.Spec.Rept.32]. The brachiopods suggest a BA 3 Janius Community Group assignment, i.e. subtidal, photic zone. It is not known, however, whether the eurypterid was associated with the brachiopods or interbedded in strata that may represent another environment."
SEP environmental call based on given information and regional context
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Database number:13853
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-04-29 20:28:33 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-04-29 20:28:33
Creative Commons license:CC BY
Reference information

Primary reference:
4261. R. E. Plotnick. 1999. Habitat of Llandoverian-Lochkovian eurypterids. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities - a case study from the Silurian and Lower Devonian 106-136 [M. Foote/M. Foote/P. Wagner]