PBDB Collection

Sardeson Collection, Dunleith Formation, Mortimer 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, Mortimer Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: limestone

• Environmental call by T. Hanson.

• Limestone, sometimes dolomitic. 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 23802: authorized by Steven Holland, entered by Tori Hanson on 21.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Lingulata
Lingulida - Pseudolingulidae	? Pseudolingula iowensis ? Pseudolingula iowensis Owen 1844
Strophomenata
Billingsellida - Clitambonitidae	Vellamo americana Vellamo americana
Strophomenida - Sowerbyellidae	Sowerbyella minnesotensis Sowerbyella minnesotensis Sardeson 1892
Strophomenida - Furcitellidae	Furcitella scofieldi Furcitella scofieldi Winchell and Schuchert 1892
Strophomenida - Glyptomenidae	"Holtedahlina emaciata" = Pionomena emaciata "Holtedahlina emaciata" = Pionomena emaciata Winchell and Schuchert 1892
Strophomenida - Strophomenidae	"Strophomena trilobita" = Strophomena trilobata, Strophomena billingsi "Strophomena trilobita" = Strophomena trilobata Owen 1852 Strophomena billingsi Winchell and Schuchert 1893
Strophomenida - Rafinesquinidae	Rafinesquina deltoidea Rafinesquina deltoidea Conrad 1838
Rhynchonellata
Pentamerida - Parastrophinidae	Parastrophina bernensis Parastrophina bernensis
Atrypida - Cyclospiridae	Cyclospira bisulcata Cyclospira bisulcata Emmons 1842
Atrypida - Anazygidae	Zygospira uphami Zygospira uphami
Rhynchonellida - Rhynchotrematidae	Rhynchotrema wisconsinense, Rhynchotrema laticosta, "Lepidocyclus capax" = Hiscobeccus capax Rhynchotrema wisconsinense Rhynchotrema laticosta "Lepidocyclus capax" = Hiscobeccus capax Conrad 1842
Orthida - Draboviidae	? Diorthelasma weissi ? Diorthelasma weissi Rice 1987
Orthida - Glyptorthidae	Glyptorthis bellarugosa Glyptorthis bellarugosa Conrad 1843
Orthida - Hesperorthidae	Hesperorthis tricenaria Hesperorthis tricenaria Conrad 1843
Orthida - Platystrophiidae	Platystrophia trentonensis Platystrophia trentonensis McEwan 1919
Orthida - Plectorthidae	Plectorthis plicatella Plectorthis plicatella Hall 1847
Trilobita
Corynexochida - Illaenidae	Illaenus sp., Bumastoides porrectus, Bumastus orbicaudatus Illaenus sp. Dalman 1827 trilobite Bumastoides porrectus trilobite Bumastus orbicaudatus Billings 1859 trilobite
Phacopida - Calymenidae	"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria "Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria Conrad 1841 trilobite
Phacopida - Encrinuridae	"Encrinuroides vigilans" = Erratencrinurus vigilans "Encrinuroides vigilans" = Erratencrinurus vigilans Hall 1847 trilobite