Marsupiocrinus (Amarsupiocrinus)-Manticrinus Assoc., Eastern Iowa (Silurian of the United States)

Where: Iowa (42.1° N, 91.1° W)

• Paleocoordinates: 27.1° S, 102.6° W (Wright 2013)

• coordinate based on political unit

• basin-level geographic resolution

When: Scotch Grove Formation, Telychian (438.5 - 433.4 Ma)

• Late Llandovery (C6). lower Welton member; ?Johns Creek Quarry Member

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; dolomitic, shelly/skeletal packstone and dolomitic, shelly/skeletal grainstone

• "Echinoderms found both as intact cups and as large debris pieces...occasional root systems..this does not appear to be a thicket community...mound core BA 3...flank facies shallow-middle BA 4"
• "This comm. occurs in the so-called flank beds around a central carbonate mound core consisting of dense dolomudstones with a limited megafauna of large colonial rugose and tabulate corals and scattered crinoidal debris. The bulk of the echinoderms occur in flanking crinoidal packstones and grainstones, some displaying graded bedding. These represent debris flows around the carbonate mounds."

Collection methods: Echinoderm abundances given in table 45.26. This collection overlaps somewhat with PBDB coll. 24963.

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 26717: authorized by Michael Foote, entered by Michael Foote on 25.10.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Mollsuca indet., Stomatoporoidea indet.
Chlorophyceae
  - Receptaculitidae
Ischadites sp.
Ischadites sp. Eichwald 1861
algae
Crinoidea
 Monobathrida - Marsupiocrinidae
Marsupiocrinus (Amarsupiocrinus) primaevus, Manticrinus sp. n. sp.
Manticrinus sp. n. sp. Ausich 1986 Sea lily
 Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites depressus, Eucalyptocrinites cf. ornatus
 Monobathrida - Periechocrinidae
Periechocrinus sp.
Periechocrinus sp. Morris 1843 Sea lily
 Monobathrida - Patelliocrinidae
Macrostylocrinus sp.
 Diplobathrida - Dimerocrinitidae
Dimerocrinites sp.
Dimerocrinites sp. Phillips 1839 Sea lily
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestellidae indet.
Rhynchonellata
 Atrypida - Atrypidae
Plectatrypa sp., Atrypa "reticularis"
Plectatrypa sp. Schuchert and Cooper 1930
Atrypa "reticularis" Linnaeus 1758
 Rhynchonellida -
Rhynchonellida indet.
 Rhynchonellida - Machaerariidae
Ferganella sp.
Ferganella sp. Nikiforova 1937
 Pentamerida -
Pentamerida indet.
Pentamerida indet. Schuchert and Cooper 1931
"clorindid(?)"
 Pentamerida - Stricklandiidae
"Costistricklandia" castellana
 Spiriferida - Cyrtiidae
Eospirifer sp., Striispirifer sp.
Eospirifer sp. Schuchert 1913
Striispirifer sp. Cooper and Muir-Wood 1951
 Orthida - Rhipidomellidae
Dalejina sp.
Dalejina sp. Havlicek 1953
 Orthida - Platystrophiidae
? Platystrophia sp.
 Orthida - Hesperorthidae
Flabellitesia flabellites
Strophomenata
 Strophomenida - Leptostrophiidae
Protomegastrophia sp.
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
 Favositida - Favositidae
Favositidae indet.
Favositidae indet. Dana 1846 tabulate coral