Isle of Montreal (Ordovician of Canada)

Where: Quebec, Canada (45.6° N, 73.5° W: paleocoordinates 28.0° S, 55.9° W)

• basin-level geographic resolution

When: St. Martin Member (Aylmer Formation), Chazyan (470.0 - 457.3 Ma)

• "brach-bry-pelmatozoan-trilobite-ostracod fauna. M. Ord., upper Chazyan."

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; carbonate and shale

• "pelmatozoan calcarenite and shale. nearshore. BA3? algae present"

Size class: macrofossils

Primary reference: R. S. Bassler and M. W. Moodey. 1943. Bibliographic and faunal index of Paleozoic pelmatozoan echinoderms. Geological Society of America Special Paper 45:1-734 [G. Webster/G. Webster/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 197279: authorized by Pete Wagner, entered by Pete Wagner on 30.10.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

• "H.J. Hofmann, 1982. Middle to late Ord. fossiliferous rocks of the Montreal area. pp.D1-D41. in Y. Globensky (ed) 3rd N. Amer. Paleont. Conv. Field Trips Guidebook. Montreal Quebec"
Show authors, comments, and common names
Crinoidea
 Hybocrinida - Hybocrinidae
Hybocrinus pristinus
Hybocrinus pristinus Billings 1858 Sea lily
Billings
 Diplobathrida - Anthracocrinidae
Deocrinus asperatus
Deocrinus asperatus Billings 1859 Sea lily
 Parablastoidea - Blastocystidae
Blastoidocrinus carchariaedens
Eocrinoidea
  - Palaeocystitidae
Palaeocystites dawsoni, Palaeocystites tenuiradiatus
  -
Bolboporites americanus
Bolboporites americanus Billings 1859
Billings
Paracrinoidea
 Platycystitida - Platycystitidae
Canadocystis emmonsi, Canadocystis barrandei
Canadocystis emmonsi Hudson 1905
Hudson
Canadocystis barrandei Billings 1858
Billings
Gastropoda
 Euomphalina - Raphistomatidae
Raphistoma calyx
Raphistoma calyx Billings 1859 snail
Bivalvia
 Myalinida - Ambonychiidae
"Vanuxemia montrealensis" = Cleionychia montrealensis
"Vanuxemia montrealensis" = Cleionychia montrealensis Billings 1859 clam