Ferganella Community, Massilon, Iowa.: Telychian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Euomphalina - Platyceratidae
Platyceras sp. Conrad 1840
unclassified
Bryozoa indet. Ehrenberg 1831
crustose forms
Stenolaemata - Cryptostomata
Cryptostomata indet. Vine 1884
branching forms
Stenolaemata - Cryptostomata - Fenestellidae
Fenestellidae indet. King 1850
Rhynchonellata - Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
Rhynchonellata - Spiriferida - Cyrtiidae
Cyrtia exporrecta (Wahlenberg 1818)
recombined as Cyrtia exporrectus
Eospirifer radiatus (Sowerby 1834)
Rhynchonellata - Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
Rhynchonellata - Orthida - Platystrophiidae
Platystrophia biforata (Schlotheim 1820)
Frest et al. 1999
recombined as Platystrophia biforatus
Rhynchonellata - Atrypida - Atrypidae
Atrypa reticularis (Linnaeus 1758)
original and current combination Anomia reticularis
species name in quotes
Rhynchonellata - Pentamerida - Camerellidae
Camerella sp. Billings 1859
Trilobita - Corynexochida - Illaenidae
Stenopareia sp. Holm 1886
Rhombifera - Caryocrinitidae
Caryocrinites informal sp. B Witzke 1976 Say 1825
Frest et al. 1999
Crinoidea
Crinoidea indet. Miller 1821
Frest et al. 1999
Crinoidea - Monobathrida - Patelliocrinidae
Macrostylocrinus vermiculatus
Frest et al. 1999
Macrostylocrinus compressus
Frest et al. 1999
Crinoidea - Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites cf. ornatus
Frest et al. 1999
Crinoidea - Monobathrida - Dolatocrinidae
Allocrinus cf. subglobosus
Frest et al. 1999
Crinoidea - Monobathrida - Marsupiocrinidae
Marsupiocrinus (Amarsupiocrinus) primaevus
Frest et al. 1999
Crinoidea - Diplobathrida - Lampterocrinidae
Siphonocrinus nobilis
Frest et al. 1999
Crinoidea - Diplobathrida - Dimerocrinitidae
Dimerocrinites (Dimerocrinites) sculptus
Frest et al. 1999
Anthozoa - Stauriida - Streptelasmatidae
Streptelasmatidae indet. (Nicholson 1889)
Streptelasmidae
Anthozoa - Cystiphyllida - Tryplasmatidae
Porpites sp. Schlotheim 1820
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Heliolitida - Halysitidae
Halysites sp. von Waldheim 1813
see common names

Geography
Country:United States State/province:Iowa
Coordinates: 41.9° North, 90.9° West (view map)
Paleocoordinates:21.1° South, 56.0° West
Basis of coordinate:based on nearby landmark
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..."
SEP environmental call based on given description and same ref. pg. 807
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, come from table 45.25 (Frest et al. 1999, PBDB ref. 4379).
Metadata
Also known as:Dimerocrinites (D.) sculptus Association
Database number:24968
Authorizer:M. Foote Enterer:M. Foote
Modifier:S. Peters Research group:marine invertebrate
Created:2002-08-23 15:32:35 Last modified:2003-05-04 14:31:10
Access level:the public Released:2002-08-23 15:32:35
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]

Secondary references:

4379 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]