Holocystites (Sepulticystis) spangleri-Triamara tumida Assoc., Middle Osgood Lst: Telychian - Wenlock, Indiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Osgoodicystis wykoffi
Anthozoa
Anthozoa indet. Ehrenberg 1834
Trilobita
Trilobita indet. Walch 1771
Ostracoda
Ostracoda indet. Latreille 1802
Rhynchonellata - Athyridida - Meristidae
Merista sp. Suess 1851
Rhynchonellata - Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
Rhynchonellata - Pentamerida - Parastrophinidae
Anastrophia sp. Hall 1867
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Atrypida - Atrypinidae
Atrypina sp. Hall and Clarke 1893
unclassified
Bryozoa indet. Ehrenberg 1831
Holocystitidae
Holocystites (Megacystites) abnormis (Hall 1864)
Holocystites (Holocystites) alternatus (Hall 1861)
Holocystites (Sepulticystis) spangleri (Miller 1891)
Aristocystitidae
Triamara tumida
Crinoidea
Inadunata indet. Wachsmuth and Springer 1897
Crinoidea - Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites sp. Goldfuss 1831
Rhombifera - Caryocrinitidae
Caryocrinites sp. Say 1825
Blastoidea - Coronata - Stephanocrinidae
Cupulocorona osgoodensis
Cupulocorona gemmiformis (Hall 1872)
see common names

Geography
Country:United States State/province:Indiana
Coordinates: 38.3° North, 85.7° West (view map)
Paleocoordinates:27.4° South, 53.7° West
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Silurian
*Epoch:Late/Upper Llandovery - Middle Wenlock
*International age/stage:Telychian
Key time interval:Telychian - Wenlock
Age range of interval:438.50000 - 427.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Osgood Limestone
Stratigraphic resolution:group of beds
Stratigraphy comments: "?Late Llandoverian (C6) to ?middle Wenlockian. Lower 7 cm of Middle Osgood Limestone"
Lithology and environment
Primary lithology:pyritic grainstone
Secondary lithology: "mixed carbonate-siliciclastic"
Lithology description: "The unit in Indiana is a rubbly limestone (grainstone) with varying amounts of clastic debris...pyrite crystal clusters...some pyrite replacement.."
Environment:deep subtidal indet. Tectonic setting:cratonic basin
Geology comments: "diploporites mostly thecae...Most of the larger skeletal debris is echinodermal...brachiopods mostly articulated...There is little indication of current or wave action, but some of biogenic reworking. Echinoderm holdfasts not seen, pelmatozoan root systems rare...most likely slightly restricted qiet offshore basin with low to moderation sedimentation rate, most likely outer BA3-4"

SEP environmental call based on given information and knowledge of regional geology
Taphonomy
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:paleoecologic analysis
Taxonomic list comments:Only echinoderms and brachiopods are listed. Fauna also said to include "a few bryozoans" as well as trilobites, ostracodes, and corals.
Metadata
Database number:26806
Authorizer:M. Foote Enterer:M. Foote
Modifier:S. Peters Research group:marine invertebrate
Created:2002-11-01 15:24:50 Last modified:2003-05-04 12:11:13
Access level:the public Released:2002-11-01 15:24:50
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]