Sardeson Collection, Cummingsville Formation (Ordovician of the United States)

Where: Minnesota (45.0° N, 93.3° W: paleocoordinates 17.8° S, 62.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Prosser Limestone Formation, Shermanian (460.9 - 449.5 Ma)

• Beds numbered by F. W. Sardeson.

• group of beds-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Primary reference: W. F. Rice and E. P. Hedblom. 1987. Brachiopods and trilobites of the Sardeson Beds in the Twin Cities. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 131-135 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23278: authorized by Steven Holland, entered by Tori Hanson on 11.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Trilobita
 Corynexochida - Illaenidae
Bumastus orbicaudatus Billings 1859 trilobite
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Pterygometopidae
Sceptaspis lincolnensis Branson 1909 trilobite
 Phacopida - Encrinuridae
"Encrinuroides vigilans" = Erratencrinurus vigilans
"Encrinuroides vigilans" = Erratencrinurus vigilans Hall 1847 trilobite
 Phacopida - Cheiruridae
Ceraurus pleurexanthemus Green 1832 trilobite
 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite
Strophomenata
 Billingsellida - Clitambonitidae
 Strophomenida - Sowerbyellidae
 Strophomenida - Rafinesquinidae
 Strophomenida - Strophomenidae
Strophomena septata Winchell and Schuchert 1892
Strophomena billingsi Winchell and Schuchert 1893
Oepikina minnesotensis Winchell 1881
Furcitella scofieldi Winchell and Schuchert 1892
Rhynchonellata
 Pentamerida - Parastrophinidae
 Protorthida - Skenidiidae
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
 Rhynchonellida - Rhynchotrematidae
 Orthida - Draboviidae
 Orthida - Dalmanellidae
 Orthida - Glyptorthidae
 Orthida - Plaesiomyidae
Dinorthis pectinella, "Plaesiomys meedsi" = Dinorthis meedsi
"Plaesiomys meedsi" = Dinorthis meedsi Winchell and Schuchert 1892
 Orthida - Hesperorthidae
 Orthida - Platystrophiidae
 Orthida - Plectorthidae
Lingulata
 Lingulida - Trematidae
 Lingulida - Pseudolingulidae
 Lingulida - Obolidae
Craniata
 Craniopsida - Craniopsidae
 Craniida - Craniidae