GSC C-4460 and C-4461, Ekwan River (Silurian of Canada)

Also known as Reef 3667

Where: Ontario, Canada (53.5° N, 82.9° W: paleocoordinates 14.6° S, 44.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Attawapiskat Formation, Telychian (438.5 - 433.4 Ma)

• bed-level stratigraphic resolution

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

• biohermal beds

Size class: macrofossils

Reposited in the GSC

Primary reference: J. Jin, W. G. E. Caldwell, and B. S. Norford. 1993. Early Silurian brachiopods and biostratigraphy of the Hudson Bay Lowlands, Manitoba, Ontario and Quebec. Bulletin Geological Survey of Canada 457:1-221 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 77336: authorized by Wolfgang Kiessling, entered by Uta Merkel on 09.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corynexochida - Styginidae
Opoa sp. Lane 1972 trilobite
? Goldillaenus sp. Schindewolf 1924 trilobite
 Corynexochida - Illaenidae
 Proetida - Proetidae
Winiskia perryi trilobite
 Phacopida - Cheiruridae
Chiozoon umisk trilobite
 Athyridida - Meristellidae
Whitfieldella pygmaea Jin et al. 1993
 Pentamerida - Pentameridae
 Pentamerida - Clorindidae
Clorinda parvolinguifera Sapelnikov 1972
 Atrypida - Lissatrypidae
 Atrypida - Septatrypidae
"Atrypopsis varians" = Septatrypa varians
"Atrypopsis varians" = Septatrypa varians Poulsen 1943