Near Ion. Glyptorthis bellarugosa zonule (Ordovician of the United States)

Where: Allamakee County, Minnesota (43.1° N, 91.3° W: paleocoordinates 20.1° S, 63.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Ion Member (Decorah Formation), Rocklandian (457.3 - 449.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; calcareous shale and limestone

• Beds of greenish, bedded, slightly calcareous shale with numerous intercalated 1-inch beds of purplish, coarse textured highly fossiliferous limestone

Size class: macrofossils

Preservation: cast

Reposited in the NYSM

Primary reference: G. M. Kay. 1929. Stratigraphy of the Decorah Formation. The Journal of Geology 37(7):639-671 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 219965: authorized by Pete Wagner, entered by Pete Wagner on 27.04.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Raufella sp.
Polychaeta
 Cuniculepadida - Lepidocoleidae
Lepidocoleus jamesi
Lepidocoleus jamesi Hall and Whitfield 1875 scale worm
Craniata
 Craniopsida - Craniopsidae
"Pholidops minor" = Craniops
"Pholidops minor" = Craniops
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
Rhynchotrema sp.
Rhynchotrema sp. Hall 1860
 Orthida - Dalmanellidae
"Dalmanella rogata" = Paucicrura rogata
"Dalmanella rogata" = Paucicrura rogata Sardeson 1892
 Orthida - Hesperorthidae
"Orthis tricenaria" = Hesperorthis tricenaria
"Orthis tricenaria" = Hesperorthis tricenaria Conrad 1843
 Orthida - Plaesiomyidae
Dinorthis sweeneyi
Dinorthis sweeneyi Winchell 1881
 Orthida - Glyptorthidae
"Hebertella (Glyptorthis) bellarugosa" = Glyptorthis bellarugosa
"Hebertella (Glyptorthis) bellarugosa" = Glyptorthis bellarugosa Conrad 1843
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina inquassa
 Strophomenida - Strophomenidae
Strophomena filitexta
 Strophomenida - Plectambonitidae
Plectambonites (Sowerbyella) sp.
Stenolaemata
 Cryptostomata - Rhinidictyidae
Pachydictya fimbriata, Pachydictya occidentalis, Rhinidictya exigua, Rhinidictya mutabilis
Rhinidictya mutabilis Ulrich 1882
 Cryptostomata - Escharoporidae
"Arthropora bifurcata" = Graptodictya
"Arthropora bifurcata" = Graptodictya
 Cryptostomata - Arthrostylidae
Arthroclema cornutum
 Trepostomida - Atactotoechidae
Cyphotrypa informis
Ostracoda
 Leperditellocopida - Schmidtellidae
Schmidtella affinis, Schmidtella sp.
Schmidtella sp. Ulrich 1892 ostracod
 Hollinocopida - Eurychilinidae
Eurychilina ventrosa
 Hollinocopida - Tetradellidae
Tetradella sp., cf. Tetradella sp., Ceratopsis aff. chambersi
Tetradella sp. Ulrich 1890 ostracod
cf. Tetradella sp. Ulrich 1890 ostracod
Ceratopsis aff. chambersi Miller 1874 ostracod
 Hollinocopida - Euprimitiidae
Primitiella cf. constricta
Primitiella cf. constricta Ulrich 1894 ostracod
 Beyrichicopida - Ctenonotellidae
? Steusloffia aff. signata, ? Steusloffia sp.
? Steusloffia sp. Ulrich and Bassler 1908 ostracod
 Beyrichicopida - Richinidae
Jonesella obscura
 Beyrichicopida - Drepanellidae
cf. Drepanella sp., Scofieldia bilateralis
 Beyrichicopida - Bolliidae
Bollia unguloidea
 Podocopida - Bythocyprididae
Bythocypris sp.
Bythocypris sp. Brady 1880 ostracod
 Platycopida - Cytherellidae
? Cytherella sp.
? Cytherella sp. Jones 1849 ostracod
 Palaeocopida - Beyrichiidae
Halliella labiosa
 Palaeocopida - Leperditellidae
"? Cytherella rugosa" = Punctaparchites rugosus, "? Cytherella arcta" = Punctaparchites rugosus
"? Cytherella rugosa" = Punctaparchites rugosus Jones 1858 ostracod
"? Cytherella arcta" = Punctaparchites rugosus Jones 1858 ostracod
 Palaeocopida - Eridoconchidae
Eridoconcha oboloides
Trilobita
 Asaphida - Asaphidae
Isotelus sp.
Isotelus sp. Dekay 1824 trilobite
Anthozoa
 Stauriida - Streptelasmatidae
Streptelasma corniculum
Streptelasma corniculum Hall 1847 horn coral