Tabulate Coral-Lamellar Stromatoporoid Comm., Llandovery, E Iowa and NW Illinois: Llandovery, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Porifera indet. Grant 1836
Stromatoporoidea - Stromatoporoidea
Stromatoporoidea indet. Nicholson and Murie 1878
lamellar forms
Stromatoporoidea - Clathrodictyida - Actinodictyidae
Ecclimadictyon fastigiatum (Nicholson 1886)
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Heliolitida - Halysitidae
Halysites sp. von Waldheim 1813
Anthozoa - Favositida - Favositidae
Favosites sp. Lamarck 1816
Anthozoa - Auloporida - Syringoporidae
Syringopora sp. Goldfuss 1826
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
two solitary species
Anthozoa - Stauriida - Arachnophyllidae
Arachnophyllum sp. Dana 1846
Ostracoda
Ostracoda indet. Latreille 1802
Trilobita - Phacopida - Encrinuridae
Encrinuridae indet. Angelin 1854
Trilobita - Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840
Trilobita - Corynexochida - Illaenidae
Stenopareia sp. Holm 1886
unclassified
Bryozoa indet. Ehrenberg 1831
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
Strophomenata - Strophomenida - Leptellinidae
Merciella sp. Lamont and Gilbert 1945
spelled with current rank as Leptellina (Merciella)
Rhynchonellata - Rhynchonellida
Rhynchonellida indet. Kuhn 1949
Rhynchonellata - Orthida
Orthida indet. Schuchert and Cooper 1932
Rhynchonellata - Orthida - Hesperorthidae
Flabellitesia sp. Zhang 1989
Rhynchonellata - Spiriferida - Delthyrididae
Howellella sp. Kozlowski 1946
Rhynchonellata - Atrypida
Protatrypa sp. Boucot et al. 1964
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Athyridida - Meristellidae
Cryptothyrella sp. Cooper 1942
synonym of Hindella
Gastropoda
Gastropoda indet. Cuvier 1795
Cephalopoda
Nautiloidea indet. Agassiz 1847
Cyclocystoidea
Cyclocystoidea indet. Miller and Gurley 1895
Crinoidea
Crinoidea indet. Miller 1821
Rhombifera - Rhombifera
Rhombifera indet. (Zittel 1879)
see common names

Geography
Country:United States State/province:Iowa
Coordinates: 43.0° North, 91.0° West (view map)
Paleocoordinates:19.4° South, 56.0° West
Basis of coordinate:based on political unit
Geographic resolution:basin
Time
Period:Silurian Epoch:Llandovery
10 m.y. bin:Silurian 1
Key time interval:Llandovery
Age range of interval:443.80000 - 433.40000 m.y. ago
Stratigraphy
Stratigraphy comments: "Known in Iowa from strata belonging to a range of Llandoverian (Rhuddanian-Telychian) ages."
Lithology and environment
Primary lithology:shelly/skeletal wackestone
Secondary lithology:shelly/skeletal packstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "The matrix sediments containing this community are variably characterized by skeletal wackestones and packstones, and some grainstones are present."
Environment:open shallow subtidal Tectonic setting:cratonic basin
Geology comments: degree of skeletal abrasion varies; overturned corals indicate disturbance; intraclasts locally; micritization of skeletal grains (characteristic of photic zone); carbonate mud indicates below effective wave base, but packstones suggest winnowing; position close to wave base preferred BA 2, impinging on BA 3.
SEP environmental call based on given description and p. 807 in this volume
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: Petrographic thin-section point counts given for two localities in table 50.14. I have combined these taxa and others mentioned in text.
Metadata
Database number:25041
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-08-26 14:44:48 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-08-26 14:44:48
Creative Commons license:CC BY
Reference information

Primary reference:
7006. B. J. Witzke and M. E. Johnson. 1999. Silurian brachiopod and related benthic communities from carbonate platform and mound environments of Iowa and surrounding areas. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 806-840 [M. Foote/M. Foote/M. Foote]