Iron Ridge, Richmond Group (Ordovician of the United States)

Where: Wisconsin (43.4° N, 88.5° W: paleocoordinates 20.6° S, 57.9° W)

• coordinate estimated from map

When: Richmond Group, Richmondian (449.5 - 443.7 Ma)

• "highest beds of Maquoketa Shale of the Richmond Group", in Bassler (1911)

Environment/lithology: marine; lithology not reported

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 167556: authorized by Björn Kröger, entered by Björn Kröger on 24.03.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

 Cyclostomata - Corynotrypidae
Corynotrypa abrupta Bassler 1911