Where: Iowa (41.9° N, 90.6° W: paleocoordinates 21.3° S, 55.8° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Welton Member (Scotch Grove Formation), Telychian (438.5 - 433.4 Ma)
• Welton Member, approximate middle part of Scotch Grove Formation.
• member-level stratigraphic resolution
Environment/lithology: deep subtidal ramp; dolomitic, shelly/skeletal wackestone and dolomitic, shelly/skeletal packstone
Collection methods: Abundances given in Table 50.3. Echinoderms, which dominate the community, are not listed (see Frest et al. 1999--PBDB ref. 4379).
Primary reference: B. J. Witzke and M. E. Johnson. 1999. Silurian brachiopod and related benthic communities from carbonate platform and mound environments of Iowa and surrounding areas. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 806-840 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 24969: authorized by Michael Foote, entered by Michael Foote on 23.08.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Cephalopoda | |
Kionoceras sp. Hyatt 1884 | |
Dawsonoceras sp. Hyatt 1884 | |
Michelinoceras sp. Foerste 1932 | |
Amphicyrtoceras sp. Foerste 1924 | |
Nautiloidea indet. Agassiz 1847 nautiloid | |
Gastropoda | |
Gastropoda indet. Cuvier 1795 snail | |
Platyceras sp. Conrad 1840 snail | |
Rhynchonellata | |
Camerella sp. Billings 1859 | |
| |
Rhynchonellida indet. Kuhn 1949 | |
Rhynchotreta sp. Hall 1879 | |
Ferganella sp. Nikiforova 1937 | |
Hedeina sp. Boucot 1957
Eospirifer radiatus Sowerby 1834
"Cyrtia exporrecta" = Cyrtia exporrectus Wahlenberg 1818 | |
Plectatrypa sp. Schuchert and Cooper 1930 | |
Meristina sp. Hall 1867
Whitfieldella sp. Hall and Clarke 1893 | |
Platystrophia sp. King 1850 | |
Dalejina sp. Havlicek 1953 | |
Isorthis sp. Kozlowski 1929
Resserella sp. Bancroft 1928 | |
? Skenidioides sp. Schuchert and Cooper 1931 | |
Strophomenata | |
Leptaena sp. Dalman 1828 | |
"Protomegastrophia profunda" = Brachyprion (Protomegastrophia) profunda
"Protomegastrophia profunda" = Brachyprion (Protomegastrophia) profunda Hall 1852 | |
Eoplectodonta sp. Kozlowski 1929 | |
"Coolinia sp." = Fardenia (Coolinia)
| |
Bryozoa | |
| |
Stenolaemata | |
| |
Fenestellidae indet. King 1850 | |
Lichenalia sp. Hall 1851 | |
Trilobita | |
Bumastus sp. Murchison 1839 trilobite
Stenopareia sp. Holm 1886 trilobite | |
Calymenidae indet. Milne-Edwards 1840 trilobite | |
Anthozoa | |
Porpites sp. Schlotheim 1820 horn coral | |
Streptelasmatidae indet. Nicholson 1889 horn coral | |
Heliolites sp. Dana 1846 tabulate coral | |
Halysites sp. von Waldheim 1813 tabulate coral |