Eucalyptocrinites crassus-Lyriocrinus melissa Assoc., Basal Waldron Unit 5: Wenlock, Indiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Mollusca indet. Linnaeus 1758
Bryozoa indet. Ehrenberg 1831
Strophomenata - Orthotetida - Chilidiopsidae
Coolinia sp. Bancroft 1949
spelled with current rank as Fardenia (Coolinia)
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Stegerhynchus whitii
original and current combination Rhynchonella (Stegerhynchus)
Rhynchonellata - Spiriferida - Cyrtiidae
Eospirifer sp. Schuchert 1913
Hedeina sp. Boucot 1957
Rhynchonellata - Orthida - Orthidae
Orthostrophia sp.
Rhynchonellata - Atrypida - Atrypidae
Atrypa reticularis (Linnaeus 1758)
original and current combination Anomia reticularis
Rhynchonellata - Pentamerida - Parastrophinidae
Anastrophia internascens
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella nitida (Hall 1843)
Rhynchonellata - Athyridida - Rhynchospirinidae
Homoeospira sp. Hall and Clarke 1893
Trilobita
Trilobita indet. Walch 1771
Trilobita - Phacopida - Dalmanitidae
Dalmanitidae indet. Vogdes 1890
Ostracoda
Ostracoda indet. Latreille 1802
"common and moderately diverse"
Pterobranchia - Dendroidea - Acanthograptidae
Dictyonema sp. Hall 1851
Crinoidea
Manicrinus erectus
Crinoidea - Botryocrinidae
"Botryocrinus" polyxo
Crinoidea - Cyathocrinida - Cyathocrinitidae
Cyathocrinites (Rugosocyathocrinites) pauli Frest 1977
Crinoidea - Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites crassus
Eucalyptocrinites tuberculatus
Crinoidea - Diplobathrida - Rhodocrinitidae
Lyriocrinus melissa
Crinoidea - Diplobathrida - Dimerocrinitidae
Dimerocrinites occidentalis
Dimerocrinites inornatus
Hydrozoa - Hydroida
Inocaulis sp. Hall 1852
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
Anthozoa - Favositida - Favositidae
Favosites occidentalis
Hexactinellida - Amphidiscosa - Pelicaspongiidae
Twenhofelella waldroni n. sp. Rigby et al. 1979
Rigby et al. 1979
Chlorophyceae - Receptaculitidae
Ischadites subturbinatus
see common names

Geography
Country:United States State/province:Indiana
Coordinates: 39.5° North, 85.7° West (view map)
Paleocoordinates:27.5° South, 51.7° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period:Silurian Epoch:Wenlock
10 m.y. bin:Silurian 2
*Epoch:Middle Wenlock
Key time interval:Wenlock
Age range of interval:433.40000 - 427.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Waldron Shale
Stratigraphic resolution:group of beds
Stratigraphy comments: Unit 5 (from bottom) of Frest (1977), which is one of five units within the basal 1 m of the Waldron.
Lithology and environment
Primary lithology:pyritic calcareous mudstone
Includes fossils?Y
Lithology description: "Sparsely fossiliferous. The common lithology is a mudstone with between 5-20% skeletal debris. Finely disseminated pyrite and small pyrite nodules and crystal clusters..." Fig 45.3 indicates calcareous shale and siltstone for this community.q
Environment:deep subtidal shelf Tectonic setting:cratonic basin
Geology comments: "Echinoderms are usually cups or calices..occasionally complete crowns...holdfasts common...no thickets...dissociated plates and other large debris not common, rarely concentrated into winnowed horizons, and generally abraded. Graptolites moderately common, finely disseminated carbonaceous matter present in small amounts...likely mid to outer Ba 4, only infrequently disturbed by storms. The low diversity is likely due to the very soft and relatively rapidly accumulating substrate..."
2003.04.06: Environmenal call by S. Peters based on field experience with unit
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Database number:26856
Authorizer:M. Foote Enterer:M. Foote
Modifier:S. Peters Research group:marine invertebrate
Created:2002-11-06 06:27:41 Last modified:2003-04-06 12:35:25
Access level:the public Released:2002-11-06 06:27:41
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:

38414 J. K. Rigby, C. Hannum, and T. J. Frest. 1979. Hexactinellid sponges from the Silurian Waldron Shale in southeastern Indiana. Journal of Paleontology 53(3):542-549 [W. Kiessling/U. Merkel]