near Cannon Falls, Phylloporina Beds (Ordovician of the United States)

Where: Minnesota (44.5° N, 92.9° W: paleocoordinates 18.3° S, 63.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Decorah Shale Formation, Mohawkian (457.5 - 452.5 Ma)

• "Phylloporina Beds of the Black River (Decorah) Shale Formation", in Bassler (1911)

Environment/lithology: marine; shale

Size classes: macrofossils, mesofossils

Primary reference: R. S. Bassler. 1911. The early Paleozoic Bryozoa of the Baltic Provinces. Bulletin of the United States National Museum 77:1-375 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 167563: authorized by Björn Kröger, entered by Björn Kröger on 24.03.2015, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Euomphalina - Helicotomidae
Ophiletina angularis Ulrich and Scofield 1897 snail
 Murchisoniina - Lophospiridae
Gyronema semicarinatum, "? Solenospira pagoda" = Ectomaria pagoda
Gyronema semicarinatum Salter 1859 snail
"? Solenospira pagoda" = Ectomaria pagoda Salter 1859 snail
 Murchisoniina - Hormotomidae
Hormotoma gracilis Hall 1847 snail
Hormotoma gracilis goodhuensis
Stenolaemata
 Trepostomata - Halloporidae
Hallopora dumalis Ulrich 1893
 Trepostomata - Monticuliporidae
Homotrypa subramosa Ulrich 1886