Cannon Falls, Nematopora Bed (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: Prosser Formation, Shermanian (457.3 - 449.6 Ma)

• "Nematopora Bed of Trenton Limestone",in Bassler (1911)

Environment/lithology: marine; limestone

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 167611: authorized by Björn Kröger, entered by Björn Kröger on 26.03.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Stenolaemata
 Trepostomata - Aisenvergiidae
Eridotrypa exigua
Eridotrypa exigua Ulrich 1893
 Cyclostomata - Crownoporidae
Mitoclema mundulum
Mitoclema mundulum Ulrich 1890
 Cystoporata - Constellariidae
Constellaria varia
Constellaria varia Ulrich 1893
 Cryptostomata - Arthrostylidae
Arthroclema armatum, Nematopora ovalis, Nematopora consueta
Arthroclema armatum Ulrich 1890
Nematopora ovalis Ulrich 1890
Nematopora consueta Bassler 1911