Ferganella Community, Behr Quarry, Welton, Iowa.: Telychian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Lechritochoceras sp.
Anthozoa - Heliolitida - Halysitidae
Halysites sp. von Waldheim 1813
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Stauriida - Streptelasmatidae
Streptelasmatidae indet. (Nicholson 1889)
Streptelasmidae
Anthozoa - Cystiphyllida - Tryplasmatidae
Porpites sp. Schlotheim 1820
Trilobita - Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840
Trilobita - Corynexochida - Illaenidae
Bumastus sp. Murchison 1839
Stenopareia sp. Holm 1886
Strophomenata - Strophomenida - Strophodontidae
Protomegastrophia profunda (Hall 1852)
recombined as Brachyprion (Protomegastrophia) profunda
Strophomenata - Strophomenida - Sowerbyellidae
Eoplectodonta sp. Kozlowski 1929
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
Strophomenata - Orthotetida - Chilidiopsidae
Coolinia sp. Bancroft 1949
spelled with current rank as Fardenia (Coolinia)
name corrected from "Coolina"
Rhynchonellata - Protorthida - Skenidiidae
? Skenidioides sp. Schuchert and Cooper 1931
Rhynchonellata - Spiriferida - Cyrtiidae
Eospirifer radiatus (Sowerby 1834)
Hedeina sp. Boucot 1957
Cyrtia exporrecta (Wahlenberg 1818)
recombined as Cyrtia exporrectus
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella sp. Hall and Clarke 1893
Meristina sp. Hall 1867
Rhynchonellata - Rhynchonellida
Rhynchonellida indet. Kuhn 1949
Rhynchonellata - Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rhynchotreta sp. Hall 1879
Rhynchonellata - Pentamerida - Gypidulidae
Gypidulidae indet. Schuchert and Le Vene 1929
sp. 1 and 2
Rhynchonellata - Pentamerida - Camerellidae
Camerella sp. Billings 1859
Rhynchonellata - Orthida - Dalmanellidae
Resserella sp. Bancroft 1928
Isorthis sp. Kozlowski 1929
Rhynchonellata - Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
Rhynchonellata - Orthida - Platystrophiidae
Platystrophia sp. King 1850
Rhynchonellata - Atrypida - Atrypidae
Atrypa reticularis (Linnaeus 1758)
original and current combination Anomia reticularis
species name in quotes
Plectatrypa sp. Schuchert and Cooper 1930
unclassified
Bryozoa indet. Ehrenberg 1831
crustose forms
Stenolaemata - Cryptostomata
Cryptostomata indet. Vine 1884
branching forms
Stenolaemata - Cryptostomata - Rhinoporidae
Lichenalia sp. Hall 1851
Stenolaemata - Cryptostomata - Fenestellidae
Fenestellidae indet. King 1850
Gastropoda
Gastropoda indet. Cuvier 1795
Gastropoda - Euomphalina - Platyceratidae
Platyceras sp. Conrad 1840
Cephalopoda - Oncocerida - Acleistoceratidae
Amphicyrtoceras sp. Foerste 1924
Cephalopoda
Nautiloidea indet. Agassiz 1847
Cephalopoda - Orthocerida - Dawsonoceratidae
Dawsonoceras sp. Hyatt 1884
Cephalopoda - Orthocerida - Kionoceratidae
Kionoceras sp. Hyatt 1884
Cephalopoda - Orthocerida - Orthoceratidae
Michelinoceras sp. Foerste 1932
see common names

Geography
Country:United States State/province:Iowa
Coordinates: 41.9° North, 90.6° West (view map)
Paleocoordinates:21.3° South, 55.8° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Silurian Epoch:Llandovery
Stage:Telychian 10 m.y. bin:Silurian 1
*International age/stage:Late/Upper Telychian
Key time interval:Telychian
Age range of interval:438.50000 - 433.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Scotch Grove Member:Welton
Stratigraphic resolution:member
Stratigraphy comments: Welton Member, approximate middle part of Scotch Grove Formation.
Lithology and environment
Primary lithology:dolomitic,shelly/skeletal wackestone
Secondary lithology:dolomitic,shelly/skeletal packstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "...occurs in dolomitized skeletal-moldic crinoidal wackestones to packstones."
Environment:deep subtidal ramp Tectonic setting:cratonic basin
Glacial or sequence phase:highstand systems tract
Geology comments: "..grains generally unabraded..brachiopods [and crinoid cups] commonly articulated..suggest quiet setting below normal wave base...some evidecne for periodic bottom disturbance by storms...slightly shallower than Costistricklandia-Eospirifer community...above BA 4 communities in the lower Welton and below BA 3 Pentameroides comm. inn the middle Scotch Grove...stratigraphic position suggests BA 3 to inner BA 4..."
Taphonomy
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:paleoecologic analysis
Collection method comments: Abundances given in Table 50.3. Echinoderms, which dominate the community, are not listed (see Frest et al. 1999--PBDB ref. 4379).
Metadata
Database number:24969
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-08-23 15:36:08 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-08-23 15:36:08
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]