PBDB Collection

Sardeson Collection, Scales Shale, Elgin Member, Illinois and Iowa (Ordovician to 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: Amplexograptus manitoulinensis graptolite zone, Elgin Member (Scales Shale Formation), Edenian to Edenian (451.0 - 449.6 Ma)

• Elgin probably is Maysvillian only.

• member-level stratigraphic resolution

Environment/lithology: limestone

• Environmental call by T. Hanson.

• Limestone, occasional shale partings. 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 23810: 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

Trilobita
Phacopida - Encrinuridae	"Encrinuroides vigilans" = Erratencrinurus vigilans "Encrinuroides vigilans" = Erratencrinurus vigilans Hall 1847 trilobite
Phacopida - Cheiruridae	Ceraurinus icarus, Ceraurus pleurexanthemus Ceraurinus icarus Billings 1860 trilobite Ceraurus pleurexanthemus Green 1832 trilobite
Phacopida - Pterygometopidae	Eomonorachus intermedius Eomonorachus intermedius Walcott 1879 trilobite
Phacopida - Calymenidae	"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria, "Calymene mamillate" = Thelecalymene mammillata "Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria Conrad 1841 trilobite "Calymene mamillate" = Thelecalymene mammillata Hall 1861 trilobite
Asaphida - Asaphidae	Isotelus susae, Isotelus iowensis, Isotelus gigas Isotelus susae Whitfield 1882 trilobite Isotelus iowensis Owen 1852 trilobite Isotelus gigas Dekay 1824 trilobite
Corynexochida - Illaenidae	Bumastus orbicaudatus Bumastus orbicaudatus Billings 1859 trilobite
Rhynchonellata
Orthida - Plaesiomyidae	Plaesiomys proavita, "Plaesiomys subquadrata" = Plaesiomys subquadratus, Austinella kankakensis Plaesiomys proavita Winchell and Schuchert 1892 "Plaesiomys subquadrata" = Plaesiomys subquadratus Hall 1847 Austinella kankakensis McChesney 1861
Orthida - Glyptorthidae	Glyptorthis bellarugosa, Glyptorthis insculpta Glyptorthis bellarugosa Conrad 1843 Glyptorthis insculpta Hall 1847
Orthida - Heterorthidae	"? Eremotrema emacerata" = Heterorthina emacerata "? Eremotrema emacerata" = Heterorthina emacerata Hall 1860
Orthida - Platyorthidae	Diceromyonia ignota Diceromyonia ignota
Orthida - Dalmanellidae	Paucicrura corpulenta, Paucicrura rogata, ? Onniella porrecta Paucicrura corpulenta Sardeson 1892 Paucicrura rogata Sardeson 1892 ? Onniella porrecta
Atrypida - Anazygidae	Zygospira modesta Zygospira modesta Hall 1847
Rhynchonellida - Rhynchotrematidae	"Lepidocyclus capax" = Hiscobeccus capax "Lepidocyclus capax" = Hiscobeccus capax Conrad 1842
Strophomenata
Orthotetida - Triplesiidae	Oxoplecia ulrichi Oxoplecia ulrichi
Strophomenida - Furcitellidae	Megamyonia unicostata Megamyonia unicostata Meek and Worthen 1868
Strophomenida - Rafinesquinidae	Rafinesquina nitans, Rafinesquina trentonensis, Rafinesquina deltoidea Rafinesquina nitans Rafinesquina trentonensis Hall 1847 Rafinesquina deltoidea Conrad 1838
Strophomenida - Strophomenidae	"Strophomena cf. fluctuosa" = Nasutimena fluctuosa, Strophomena occidentalis, "Strophomena trilobita" = Strophomena trilobata "Strophomena cf. fluctuosa" = Nasutimena fluctuosa Billings 1860 Strophomena occidentalis Foerste 1912 "Strophomena trilobita" = Strophomena trilobata Owen 1852
Strophomenida - Sowerbyellidae	"Eoplectodonta recedens" = Thaerodonta recedens, Sowerbyella minnesotensis, Eoplectodonta saxea "Eoplectodonta recedens" = Thaerodonta recedens Sardeson 1892 Sowerbyella minnesotensis Sardeson 1892 Eoplectodonta saxea
Lingulata
Lingulida - Pseudolingulidae	? Pseudolingula iowensis ? Pseudolingula iowensis Owen 1844
Lingulida - Obolidae	Lingulops sp. Lingulops sp. Hall 1871
Lingulida - Lingulasmatidae	"Lingula philomela" = Lingulasma philomela "Lingula philomela" = Lingulasma philomela Billings 1865 "Lingula" philomela
Lingulida - Discinidae	Orbiculoidea pelopea Orbiculoidea pelopea