ROM63412 (Cambrian of Canada)

Where: British Columbia, Canada (51.3° N, 116.4° W: paleocoordinates 3.4° S, 79.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Ehmaniella trilobite zone, Stephen Formation, Middle Cambrian (509.0 - 497.0 Ma)

• "thick" Stephen Formarion. "All specimens ... come from two levels within a ca. 0.6-m-thick packstone bed, which appears to be an amalgamation of several slumping events (R. Gaines pers. comm. 2012). The first level is at the base of the bed (sample ROM63412) and the second 0.4 m above (sample ROM63413). The bed occurs ca. 13 m above the base of the formation"

• bed-level stratigraphic resolution

Environment/lithology: basinal (); packstone and wackestone

• "basinal expression" of Stephen Formation, with packstone formed as "amalgamation of several slumping events."
• Specimens collected from 0.6-m thick packstone within "lowest level of a ca. 24-thick carbonate unit consisting predominantly of thin-bedded wackestones. It sits atop a 1-m-thick shale interval yielding exceptionally preserved fossils"

Size class: mesofossils

Preservation: recrystallized, replaced with silica

Collected by ROM expeditions in 2010 and 2012; reposited in the ROM

Collection methods: chemical, hydrochloric,

Primary reference: M. Streng, A. D. Butler, J. S. Peel, R. J. Garwood, and J.-B. Caron. 2016. A new family of Cambrian rhynchonelliformean brachiopods (Order Naukatida) with an aberrant coral-like morphology. Palaeontology 59(2):269-293 [P. Novack-Gottshall/P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 193550: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 28.05.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Porifera indet. Grant 1836
siliceous sponge spicules
 Hyolithelminthida - Hyolithellidae
Hyolithellus sp. Billings 1872
unclassified
  -
Echinodermata indet. Klein 1754
ossicles
Bradoriida
 Bradoriida -
Bradoriida indet. Raymond 1935
rare
Trilobita
 Corynexochida - Dorypygidae
Kootenia sp. Walcott 1899 trilobite
Juveniles
 Corynexochida - Dolichometopidae
Bathyuriscus adaeus Walcott 1916 trilobite
Rhynchonellata
 Orthida - Bohemiellidae
Kutorginata
 Kutorginida - Nisusiidae
Nisusia sp. Walcott 1905
Obolellata
 Naukatida - Tomteluvidae
Tomteluva perturbata Streng et al. 2016
Lingulata
 Lingulida - Obolidae
Obolidae indet. King 1846
 Acrotretida - Ceratretidae
Ceratretidae indet. Rowell 1965
 Acrotretida - Acrotretidae
Acrotretidae indet. Schuchert 1893
Paterinata
 Paterinida - Paterinidae
Paterinidae indet. Schuchert 1893
Stenothecoida
 Cambridioida - Cambridiidae
Stenothecoides sp. Resser 1938
Helcionelloida
 Helcionellida -
Helcionellida indet. Geyer 1994
two species