Thaerodonta-Cupulocrinus angustus-Cornulites Community of the Brainard: Richmondian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Hypsitycha hybrida
Hysitycha neenah
Porifera indet. Grant 1836
Demospongiae - Streptosclerophorida - Hindiidae
Hindia ? parva
Gastropoda
Gastropoda indet. Cuvier 1795
Gastropoda - Murchisoniina - Murchisoniidae
Murchisonia (Hormotoma) sp.
    = Murchisonia (Hormotoma) sp. d'Archiac and de Verneuil 1841
Wagner 2023
original and current combination Murchisonia
Gastropoda - Murchisoniina - Lophospiridae
Loxoplocus sp. Fischer 1885
Loxoplocus (Lophospira) sp.
    = Lophospiridae indet. Wenz 1938
Lenz 1977
Lophospira, Eunema or Paupospira
Gastropoda - Euomphalina - Platyceratidae
Cyclonema sp. Hall 1852
Bivalvia - Nuculanida - Cucullellidae
Nuculites sp. Conrad 1841
Nuculites neglectus (Hall 1862)
Bivalvia - Nuculanida - Malletiidae
Palaeoneilo fecunda (Hall 1862)
Strophomenata - Strophomenida - Sowerbyellidae
Thaerodonta recedens (Sardeson 1892)
Strophomenata - Strophomenida - Furcitellidae
Megamyonia unicostata (Meek and Worthen 1868)
Strophomenata - Strophomenida - Strophomenidae
Tetraphalerella planodorsata (Winchell and Schuchert 1892)
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Lepidocyclus sp. Wang 1949
Rhynchonellata - Orthida - Dalmanellidae
Onniella quadrata Wang 1949
recombined as Paucicrura quadrata
Rhynchonellata - Atrypida - Anazygidae
Zygospira resupinata Wang 1949
unclassified
Bryozoa indet. Ehrenberg 1831
Tentaculita - Cornulitida - Cornulitidae
Cornulites sp. Schlotheim 1820
Trilobita - Phacopida - Cheiruridae
Ceraurus sp. Green 1832
Trilobita - Phacopida - Calymenidae
Gravicalymene sp. Shirley 1936
Crinoidea
Crinoidea indet. Miller 1821
unidentified crinoid stems
Crinoidea - Cupulocrinidae
Cupulocrinus angustatus
Cupulocrinus cf. angustatus
Cupulocrinus sp. nov. cf. angustatus
Crinoidea - Porocrinida
Porocrinus crassus
Crinoidea - Plicodendrocrinidae
Dendrocrinus casei Meek 1871
recombined as Plicodendrocrinus casei
see common names

Geography
Country:United States State/province:Iowa County:Dubuque County
Coordinates: 42.9° North, 91.7° West (view map)
Paleocoordinates:19.4° South, 60.0° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 5
*Period:Late/Upper Ordovician *Epoch:Ashgill
*Local age/stage:Richmondian
Key time interval:Richmondian
Age range of interval:449.50000 - 443.70000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Maquoketa Member:Brainard
Stratigraphy comments: top 2.5 m of Brainard from contact with the Silurian
Lithology and environment
Primary lithology:bioturbation,dolomitic lithified silty,calcareous "shale"
Secondary lithology:dolomitic,ferruginous lithified wackestone
Includes fossils?Y
Lithology description: The upper Brainard sections most likely to have this community consist of silty calcareous or dolomitic biotutbated shales with interbedded brachiopod-bryozoan-echinoderm ferruginous dolowackestones and some packstones... Occasional phosphatic or highly pyritic intervals with either phosphatized diminutive or normal-sized mollusc faunas occur sporadically throughout the outcrop area.
Environment:offshore indet.
Geology comments: The variable lithology but generally intact fossil preservation in the carbonate intervals suggests a moderately offshore environment still subject, however, to at least occasional storm disturbances. A BA 3-4 position seems likely.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Database number:13260
Authorizer:M. Foote, P. Wagner Enterer:K. Koverman, P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-02-04 08:53:30 Last modified:2018-06-21 12:44:29
Access level:the public Released:2002-02-04 08:53:30
Creative Commons license:CC BY
Reference information

Primary reference:

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]

Secondary references:

7341 A. C. Lenz. 1977. Upper Silurian and Lower Devonian brachiopods of Royal Creek, Yukon Canada. Part 1. Orthoida, Strophomenida, Pentamerida, Rhynchonellida. Palaeontographica Abteilung A 159(1-3):37-109 [M. Foote/M. Foote/M. Foote]
9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]