Rugosa of Twins Falls Fmn, Alexandra Mbr (platform), Kakisa Lake/Hay River area (Devonian of Canada)

Where: Northwest Territories, Canada (61.0° N, 117.0° W: paleocoordinates 6.2° S, 37.2° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Alexandra Member (Twin Falls Formation), Frasnian (382.7 - 372.2 Ma)

• Lower unit of Alexandra Member.

• member-level stratigraphic resolution

Environment/lithology: marine; limestone

• Alexandra Member is mainly stromatoporoid-algal reef. Lower unit, with Rugosa, interpreted as platform environment.

Primary reference: R. A. McLean and J. E. Sorauf. 1988. The distribution of rugose corals in Frasnian outcrop sequences of North America. In N. J. McMillan, A. F. Embry, and D. J. Glass (eds.), Devonian of the World, Volume III. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada 379-396 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 40135: authorized by Michael Foote, entered by Michael Foote on 18.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Rugosa only
Anthozoa
 Stauriida - Kyphophyllidae
Smithiphyllum adnatum McLean and Pedder 1987 horn coral
 Stauriida - Disphyllidae
Temnophyllum sp. Walther 1928 horn coral
 Stauriida - Phillipsastreidae
Macgeea proteus, "Medusaephyllum woodmani" = Pachyphyllum
Macgeea proteus horn coral
"Medusaephyllum woodmani" = Pachyphyllum horn coral