Ile Bizard, Montreal, bryozoan mound (Ordovician of Canada)

Also known as Reef 2071

Where: Quebec, Canada (45.5° N, 73.9° W: paleocoordinates 27.2° S, 54.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Laval Formation (Chazy Group), Chazy (466.0 - 457.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone

• bryozoan mound, up to 0.75 m thick and 1 m across

Size class: macrofossils

Primary reference: D. R. Kobluk. 1981. Cavity-dwelling biota in Middle Ordovician (Chazy) bryozoan mounds from Quebec. Canadian Journal of Earth Sciences 18(1):42-54 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 80006: authorized by Wolfgang Kiessling, entered by Uta Merkel on 01.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp. Nicholson and Etheridge 1878
unclassified
  -
Rhodophyceae
  - Solenoporaceae
Solenopora sp. Dybowski 1877
unclassified
  -
Porifera indet. Grant 1836
Cephalopoda
 Endocerida - Endoceratidae
Cameroceras sp. Conrad 1842
Gastropoda
 Euomphalina - Raphistomatidae
Raphistoma sp. Hall 1847 snail
Bivalvia
 Myalinida - Ambonychiidae
"Clionychia ? montrealensis" = Cleionychia montrealensis
"Clionychia ? montrealensis" = Cleionychia montrealensis Billings 1859 clam
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
Rostricellula sp. Ulrich and Cooper 1942
 Orthida - Plaesiomyidae
Multicostella platys Billings 1859
 Orthida - Plectorthidae
Mimella ? borealis Billings 1859
Stenolaemata
 Trepostomata - Trematoporidae
Trilobita
  -
Trilobita indet. Walch 1771 trilobite
Paracrinoidea
 Platycystitida - Malocystitidae
Eocrinoidea
  - Palaeocystitidae
 Parablastoidea - Blastocystidae
? Blastoidocrinus sp. Billings 1859
 Life -
Trypanites sp. Mägdefrau 1932