PBDB Collection

Kirkfield Quarry, middle-lower Bobcaygeon (Ordovician of Canada)

Where: Ontario, Canada (44.6° N, 79.0° W)

• Paleocoordinates: 20.8° S, 107.3° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: Middle - Upper Member (Bobcaygeon Formation), Katian (452.8 - 445.2 Ma)

• ...material examined is from...the classic Kirkfield Quarry (44°35'6.32''N, 78°58'8.16''W), which is middle–lower Bobcaygeon

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, hardground, calcareous wackestone and lithified, hardground, calcareous siltstone

• The paleoenvironments in which the Bobcaygeon and Verulam formations were deposited have been interpreted as a proximal carbonate shelf that ranged in depth and proximity from shoal to shallow shelf in the Bobcaygeon and from deep shelf to shoal/shallow shelf in the Verulam (Armstrong, 2000).

• Both the Bobcaygeon and Verulam formations are comprised of bioclastic wackestones, grainstones, and packstones interbedded with calcareous shales and siltstones. The Verulam contains more shale than the underlying Bobcaygeon Formation (Liberty, 1969). Several hardgrounds have been documented in detail from the upper Bobcaygeon and lower Verulam (Brett and Liddell, 1978; Brett and Brookfield, 1984; Brett and Taylor, 1999).

Size classes: macrofossils, mesofossils

• ...numerous exceptionally preserved crinoid specimens with arms, stems, and attachment structures intact.

Preservation: original calcite

Reposited in the USNM

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

• Other material is reposited in the Cincinnati Museum Center Invertebrate Paleontology Collection

Primary reference: S. R. Cole, W. I. Ausich, D. F. Wright and J. M. Koniecki. 2018. An echinoderm Lagerstätte from the Upper Ordovician (Katian), Ontario: taxonomic re-evaluation and description of new dicyclic camerate crinoids. Journal of Paleontology 1-18 [S. Cole/S. Cole]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192278: authorized by Selina Cole, entered by Selina Cole on 19.03.2018, edited by Pete Wagner

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names

Asteroidea
Hadrosida - Palaeasteridae	Sertulaster keslingi² Sertulaster keslingi² Blake and Koniecki 2019 sea star

Rhombifera - Pleurocystitidae	Amecystis laevis³ Amecystis laevis³ Raymond 1921
Crinoidea
Homocrinida - Cincinnaticrinidae	"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus¹ "Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus¹ Warn and Strimple 1977 Sea lily
Calceocrinida - Calceocrinidae	Cremacrinus inaequalis¹, Cremacrinus guttenbergensis¹ Cremacrinus inaequalis¹ Billings 1859 Sea lily Cremacrinus guttenbergensis¹ Kolata 1975 Sea lily
Hybocrinida - Hybocystitidae	Hybocystites problematicus¹ Hybocystites problematicus¹ Wetherby 1880 Sea lily
Hybocrinida - Hybocrinidae	Hybocrinus tumidus¹ Hybocrinus tumidus¹ Billings 1857 Sea lily
Diplobathrida - Cleiocrinidae	Cleiocrinus regius, Cleiocrinus lepidotus n. sp. Cleiocrinus regius Billings 1857 Sea lily Cleiocrinus lepidotus n. sp. Cole et al. 2018 Sea lily

¹Ausich et al. 2018; ²Blake and Koniecki 2019; ³Parsley 1970