Sardeson Collection, Dunleith Formation, Eagle Point Member, Illinois and Iowa (Ordovician of the United States)

Where: Illinois, Iowa (42.0° N, 90.5° W: paleocoordinates 21.3° S, 63.6° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Belodina confluens conodont zone, Eagle Point Member (Dunleith Formation), Shermanian (460.9 - 449.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: dolomitic limestone

• Environmental call by T. Hanson.
• Slightly dolomitic limestone. Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan.

Size class: macrofossils

Primary reference: J. A. Catalani. 1987. Biostratigraphy of the Middle and Late Ordovician cephalopods of the Upper Mississippi Valley area. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 187-189 [S. Holland/T. Hanson/S. Bruning]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23800: authorized by Steven Holland, entered by Tori Hanson on 21.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Sowerbyellidae
 Strophomenida - Furcitellidae
Furcitella scofieldi Winchell and Schuchert 1892
 Strophomenida - Rafinesquinidae
 Strophomenida - Strophomenidae
Strophomena billingsi Winchell and Schuchert 1893
 Strophomenida - Glyptomenidae
"Holtedahlina emaciata" = Pionomena emaciata
"Holtedahlina emaciata" = Pionomena emaciata Winchell and Schuchert 1892
 Billingsellida - Clitambonitidae
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
 Orthida - Plaesiomyidae
"Plaesiomys meedsi" = Dinorthis meedsi, Dinorthis pectinella
"Plaesiomys meedsi" = Dinorthis meedsi Winchell and Schuchert 1892
Dinorthis pectinella Emmons 1842
 Orthida - Hesperorthidae
 Orthida - Glyptorthidae
 Orthida - Plectorthidae
 Orthida - Platystrophiidae
 Orthida - Dalmanellidae
Paucicrura rogata Sardeson 1892
 Orthida - Draboviidae
 Protorthida - Skenidiidae
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
 Pentamerida - Parastrophinidae
Parastrophina bernensis
[Parastrophina berensis]
Craniata
 Craniida - Craniidae
"Acanthocrania setigeria" = Acanthocrania setigera Hall 1866
[entered as Acanthocrania setigera]
 Craniopsida - Craniopsidae
Lingulata
 Lingulida - Pseudolingulidae
 Lingulida - Obolidae
 Lingulida - Trematidae
Trilobita
 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Encrinuridae
"Encrinuroides vigilans" = Erratencrinurus vigilans
"Encrinuroides vigilans" = Erratencrinurus vigilans Hall 1847 trilobite
 Phacopida - Cheiruridae
Ceraurus pleurexanthemus Green 1832 trilobite
 Phacopida - Calymenidae
"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria
"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria Conrad 1841 trilobite
 Phacopida - Pterygometopidae
Sceptaspis lincolnensis Branson 1909 trilobite