Near Ion. Glyptorthis bellarugosa zonule: Rocklandian, Minnesota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Stauriida - Streptelasmatidae
Streptelasma corniculum Hall 1847
Ostracoda - Palaeocopida - Eridoconchidae
Eridoconcha oboloides
Ostracoda - Palaeocopida - Beyrichiidae
Halliella labiosa
Ostracoda - Palaeocopida - Leperditellidae
? Cytherella rugosa (Jones 1858)
? Cytherella arcta (Ulrich 1894)
Ostracoda - Palaeocopida - Richinidae
Jonesella obscura
Ostracoda - Palaeocopida - Bolliidae
Bollia unguloidea
Ostracoda - Palaeocopida - Drepanellidae
cf. Drepanella sp.
Scofieldia bilateralis
Ostracoda - Palaeocopida - Ctenonotellidae
? Steusloffia aff. signata
? Steusloffia sp. Ulrich and Bassler 1908
Ostracoda - Palaeocopida - Eurychilinidae
Eurychilina ventrosa
Ostracoda - Palaeocopida - Tetradellidae
Tetradella sp. Ulrich 1890
cf. Tetradella sp. Ulrich 1890
Ceratopsis aff. chambersi (Miller 1874)
Ostracoda - Palaeocopida - Euprimitiidae
Primitiella cf. constricta Ulrich 1894
Ostracoda - Palaeocopida - Schmidtellidae
Schmidtella affinis
Schmidtella sp. Ulrich 1892
Ostracoda - Platycopida - Cytherellidae
? Cytherella sp. Jones 1849
Ostracoda - Podocopida - Bythocyprididae
Bythocypris sp. Brady 1880
Trilobita - Asaphida - Asaphidae
Isotelus sp. Dekay 1824
Polychaeta - Phyllodocida - Lepidocoleidae
Lepidocoleus jamesi (Hall and Whitfield 1875)
Stenolaemata - Cryptostomata - Escharoporidae
Arthropora bifurcata
Stenolaemata - Cryptostomata - Rhinidictyidae
Rhinidictya exigua
Rhinidictya mutabilis Ulrich 1882
Pachydictya fimbriata
Pachydictya occidentalis
Stenolaemata - Cryptostomata - Arthrostylidae
Arthroclema cornutum
Stenolaemata - Trepostomida - Atactotoechidae
Cyphotrypa informis
Craniata - Craniopsida - Craniopsidae
Pholidops minor
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Rhynchotrema sp. Hall 1860
Rhynchonellata - Orthida - Hesperorthidae
Orthis tricenaria Conrad 1843
Rhynchonellata - Orthida - Plaesiomyidae
Dinorthis sweeneyi (Winchell 1881)
Rhynchonellata - Orthida - Glyptorthidae
Hebertella (Glyptorthis) bellarugosa (Conrad 1843)
Rhynchonellata - Orthida - Dalmanellidae
Dalmanella rogata (Sardeson 1892)
Strophomenata - Strophomenida - Plectambonitidae
Plectambonites (Sowerbyella) sp. Pander 1830
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina inquassa
Strophomenata - Strophomenida - Strophomenidae
Strophomena filitexta (Hall 1847)
unclassified
Raufella sp.
see common names

Geography
Country:United States State/province:Minnesota County:Allamakee
Coordinates: 43.1° North, 91.3° West (view map)
Paleocoordinates:20.1° South, 63.2° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period: Ordovician Epoch: Late Ordovician
10 m.y. bin: Ordovician 4-5
Key time interval: Rocklandian
Age range of interval: 457 - 449.8 m.y. ago
Stratigraphy
Geological group:Galena Formation:Decorah Member:Ion
Local section:Ion Local bed:22.1 - 23.25 ft
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: calcareous "shale"
Secondary lithology: "limestone"
Lithology description: Beds of greenish, bedded, slightly calcareous shale with numerous intercalated 1-inch beds of purplish, coarse textured highly fossiliferous limestone
Environment:deep subtidal shelf Tectonic setting:cratonic basin
Taphonomy
Modes of preservation:cast
Size of fossils:macrofossils
Temporal resolution:time-averaged
Spatial resolution:autochthonous
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:NYSM
Metadata
Database number:219965
Authorizer:P. Wagner Enterer:P. Wagner
Research group:marine invertebrate
Created:2021-04-27 23:48:27 Last modified:2021-04-27 23:48:27
Access level:the public Released:2021-04-27 23:48:27
Creative Commons license:CC BY
Reference information

Primary reference:
76692. G. M. Kay. 1929. Stratigraphy of the Decorah Formation. The Journal of Geology 37(7):639-671 [P. Wagner/P. Wagner]