Homard Road, Anticosti Island (Ordovician of Canada)

Where: Quebec, Canada (49.4° N, 62.3° W: paleocoordinates 22.5° S, 36.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Laframboise Member (Ellis Bay Formation), Hirnantian (445.2 - 443.4 Ma)

• Although the position of the Ellis Bay – Becscie formational boundary in relation to the end-Ordovician extinction horizon remains a topic of discussion (Copper et al. 2013), the stratigraphic position of the Laframboise reefs is certain. The Laframboise Member of the Ellis Bay Formation is from the uppermost Hirnantian, and the reefs are at or very close to the top of this member, thus immediately prior to the Ordovician−Silurian boundary.

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

• stromatoporoid−coral−calcimicrobial reefs

Size class: macrofossils

Preservation: original calcite

Primary reference: S. L. Sheffield, W. I. Ausich, and C. D. Sumrall. 2018. Late Ordovician (Hirnantian) diploporitan fauna of Anticosti Island, Quebec, Canada: implications for evolutionary and biogeographic patterns. Canadian Journal of Earth Sciences 55(1):1-7 [S. Cole/S. Cole/S. Cole]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191373: authorized by Selina Cole, entered by Selina Cole on 24.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sphaeronitida - Holocystitidae
Holocystites salmoensis n. sp. Sheffield et al. 2018