Marsupiocrinus (Amarsupiocrinus) primaevus Assoc., Johns Creek Quarry (Silurian to of the United States)

Where: Iowa (42.1° N, 91.1° W)

• Paleocoordinates: 27.2° S, 100.7° W (Wright 2013)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Welton Member (Scotch Grove Formation), Telychian to Telychian (438.5 - 430.5 Ma)

• Late Llandovery (C6) to Early Wenlock; lower to middle Welton member.

• member-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; dolomitic, shelly/skeletal wackestone

• "Most echinoderms intact calices..root systems scattered throughout..sporadic evidence of winnowing or size sorting locally...likely in the BA 3-4 boundary range, below normal wave base but not completely below storm wave base."

•

•SEP environmental call based on given description and same vol. page 807.

• "The commonest lithology is flat-bedded, porous, noncherty, skeletal-moldic (esp. crinoid moldic) dolowackestone"

Collection methods: Echinoderm and brachiopod abundances given in table 45.27. Some overlap between this collection and 24963, but they are not redundant, nor is one a subset of the other.

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 26720: 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
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
 Monobathrida - Marsupiocrinidae
Marsupiocrinus (Amarsupiocrinus) primaevus
 Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites sp.
Eucalyptocrinites sp. Goldfuss 1831 Sea lily
 Monobathrida - Patelliocrinidae
Thomasocrinus cylindrica, Macrostylocrinus sp.
 Diplobathrida - Rhodocrinitidae
Luxocrinus simplex
Strophomenata
 Orthotetida - Chilidiopsidae
"? Coolinia sp." = Fardenia (Coolinia)
"? Coolinia sp." = Fardenia (Coolinia) Bancroft 1949
Rhynchonellata
 Orthida - Rhipidomellidae
? Dalejina sp.
? Dalejina sp. Havlicek 1953
 Orthida - Dalmanellidae
Isorthis sp.
Isorthis sp. Kozlowski 1929
 Spiriferida - Cyrtiidae
Eospirifer radiatus, "Cyrtia exporrecta" = Cyrtia exporrectus
Eospirifer radiatus Sowerby 1834
"Cyrtia exporrecta" = Cyrtia exporrectus Wahlenberg 1818
 Athyridida - Meristellidae
? Meristina sp.
? Meristina sp. Hall 1867
 Pentamerida - Clorindidae
Clorinda sp.
Clorinda sp. Barrande 1879
 Pentamerida - Stricklandiidae
"Costistricklandia" castellana
 Atrypida - Atrypidae
Atrypa "reticularis"
Atrypa "reticularis" Linnaeus 1758
 Rhynchonellida - Machaerariidae
Ferganella sp.
Ferganella sp. Nikiforova 1937
Trilobita
 Phacopida - Cheiruridae
Youngia sp.
Youngia sp. Lindström 1885 trilobite
 Phacopida - Calymenidae
Calymene sp.
Calymene sp. Brongniart 1822 trilobite
 Corynexochida - Illaenidae
Stenopareia sp.
Stenopareia sp. Holm 1886 trilobite
Anthozoa
 Heliolitida - Halysitidae
Halysites sp.
Halysites sp. von Waldheim 1813 tabulate coral
 Favositida - Favositidae
Favosites sp.
Favosites sp. Lamarck 1816 tabulate coral