Where: Quebec, Canada (50.2° N, 64.1° W: paleocoordinates 26.2° S, 45.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Perroquet Member (Mingan Formation), Chazyan (470.0 - 457.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, dolomitic, stromatolitic wackestone and lithified, dolomitic grainstone

Primary reference: J. K. Rigby and A. Desrochers. 1995. Lower and Middle Ordovician lithistid demosponges from the Mingan Islands, Gulf of St. Lawrence, Quebec, Canada. Journal of Paleontology Memoir 69(4):1-35 [S. Peters/S. Peters]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66133: authorized by Shanan Peters, entered by Shanan Peters on 29.09.2006

Creative Commons license: CC BY (attribution)