Where: Iowa (43.0° N, 91.0° W: paleocoordinates 20.3° S, 55.3° W)
• coordinate based on political unit
• local area-level geographic resolution
When: Hopkinton Formation, Telychian (438.5 - 433.4 Ma)
• Principally from the Farmers Creek Member.
• formation-level stratigraphic resolution
Environment/lithology: deep subtidal ramp; dolomitic, shelly/skeletal wackestone
•
•SEP environmental call based on given description and same vol. page 807.
Collection methods: I have combined seven localities (with abundances) in table 50.12, as well as other taxa mentioned in text. Not all higher taxa treated in the same detail as the brachiopods. See Frest et al. (1999--PBDB ref. 4379) for echinoderms.
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 25038: authorized by Michael Foote, entered by Michael Foote on 26.08.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Chlorophyceae | |
| |
unclassified | |
| |
Anthozoa | |
| |
Halysites sp. von Waldheim 1813 tabulate coral | |
Favosites sp. Lamarck 1816 tabulate coral | |
unclassified | |
| |
Crinoidea | |
| |
Carpocrinus bodei Sea lily | |
Macrostylocrinus sp. Sea lily | |
Trilobita | |
Stenopareia sp. Holm 1886 trilobite | |
Arctinurus sp. Castelnau 1843 trilobite | |
Calymenidae indet. Milne-Edwards 1840 trilobite | |
Encrinuridae indet. Angelin 1854 trilobite | |
Gastropoda | |
Straparollus sp. de Montfort 1810 snail | |
Cyclonema sp. Hall 1852 snail
Platyceras sp. Conrad 1840 snail | |
Phanerotrema sp. Fischer 1885 snail | |
Murchisonioidea indet. Koken 1896 snail | |
Cephalopoda | |
Nautiloidea indet. Agassiz 1847 nautiloid | |
Rostroconchia | |
Rostroconchia indet. Pojeta et al. 1972 | |
Bivalvia | |
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam | |
Craniata | |
Dinobolus sp. Hall 1871 | |
Chileata | |
"Dictyonella sp." = Eodictyonella
"Dictyonella sp." = Eodictyonella Wright 1994 | |
Strophomenata | |
"Coolinia sp." = Fardenia (Coolinia)
| |
Protomegastrophia sp. Caster 1939 | |
Leptaena rhomboidalis Wahlenberg 1818 | |
Eoplectodonta sp. Kozlowski 1929 | |
Rhynchonellata | |
Pentamerus oblongus de Sowerby 1839 | |
Orthida indet. Schuchert and Cooper 1932 | |
Linoporella sp. Schuchert and Cooper 1931 | |
Isorthis sp. Kozlowski 1929
Resserella sp. Bancroft 1928 | |
Dicoelosia sp. King 1850 | |
"Platystrophia biforata" = Platystrophia biforatus
"Platystrophia biforata" = Platystrophia biforatus Schlotheim 1820 | |
Ferganella sp. Nikiforova 1937 | |
| |
Nucleospira sp. Hall 1859 | |
Whitfieldella sp. Hall and Clarke 1893
Meristina sp. Hall 1867 | |
Stenolaemata | |
| |
Fenestellidae indet. King 1850 |