Stephanocrinus cornetti-Cupulocorona osgoodensis Assoc., Osgood Fms., Indiana (Silurian to of the United States)

Where: Indiana (39.1° N, 85.3° W: paleocoordinates 26.3° S, 53.6° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Osgood Formation, Telychian to Telychian (438.5 - 430.5 Ma)

• "?Latest Llandoverian (C6) to Early Wenlockian...Portions of the Middle Osgood Limestone, Middle Osgood Shale, and Upper Osgood Shale = Osgood Member, Salamonie Dolomite.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; shelly/skeletal, argillaceous wackestone

• "bryozoan colonies and echinoderm calices sometimes intact...trilobites generally dissociated...winnowed debris piles in some sections..root systems common...not associated with mounds...BA 4-5..."

•SEP environmental call based on given information and knowledge of regional geology

• "The most common lithology is siliciclastic or carbonate-muddy, echinodermal-bryozoan wackestone with up to 50% skeletal debris. Detrital pyrite grains and partial pyrite replacement of fossils clasts frequently noted."

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26798: authorized by Michael Foote, entered by Michael Foote on 01.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Dalmanitidae
Dalmanitidae indet. Vogdes 1890 trilobite
Rhynchonellata
 Spiriferida - Cyrtiidae
Eospirifer sp. Schuchert 1913
 Protorthida - Skenidiidae
Skenidioides sp. Schuchert and Cooper 1931
 Atrypida - Atrypidae
Plectatrypa sp. Schuchert and Cooper 1930
Atrypa sp. Dalman 1828
 Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
 Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
 Orthida - Dicoelosiidae
Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
Gastropoda
 Euomphalina - Platyceratidae
Platyceras sp. Conrad 1840 snail
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Coronoidea
 Coronata - Stephanocrinidae
 Rhombifera - Caryocrinitidae
Crinoidea
 Disparida -
Zophocrinus sp. Miller 1891 Sea lily
Zophocrinus (s.l.)
 Pisocrinida - Pisocrinidae
 Sagenocrinida - Lecanocrinidae
 Cyathocrinida - Thalamocrinidae
Thalamocrinus sp. Miller and Gurley 1895 Sea lily
 Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites sp. Goldfuss 1831 Sea lily
 Diplobathrida -
Lyriocrinus sp. Hall 1852 Sea lily
Diploporita
 Aristocystitoida - Aristocystitidae
Triamara spp. Tillman 1967
Triamara ventricosa Miller 1879
 Sphaeronitida - Holocystitidae
Heteractinida
 Octactinellida - Astraeospongiidae
Astraeospongium sp. Roemer 1860
Anthozoa
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral