Where: Ontario, Canada (44.6° N, 79.1° W: paleocoordinates 23.9° S, 52.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Corynoides americanus graptolite zone, Bobcaygeon Formation (Simcoe Group), Katian (453.0 - 445.2 Ma)

• Amorphognathus tvaerensis Zone. The Sandbian–Katian boundary is identified in the Lower

•Member of the Kirkfield Formation, with the remainder of the for- mation being deposited in the earliest Katian (Paton and Brett, 2020).

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, medium-grained, coarse shale

Size classes: macrofossils, mesofossils

• From Cole et al., 2018: ...numerous exceptionally preserved crinoid specimens with arms, stems, and attachment structures intact.

Preservation: original calcite

Collected by J. M. Koniecki; reposited in the UMMP

Collection methods: quarrying, surface (float), surface (in situ)

Primary reference: J. Moysiuk, A. Izquierdo-López, G. E. Kampouris and J.-B. Caron. 2022. A new marrellomorph arthropod from southern Ontario: a rare case of soft-tissue preservation on a Late Ordovician open marine shelf. Journal of Paleontology 96(4):859-874 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 228229: authorized by Pete Wagner, entered by Pete Wagner on 23.11.2022

Creative Commons license: CC BY (attribution)