The lower Cambrian Cranbrook Lagerstätte of British Columbia

Caron, Jean-Bernard; Webster, Mark; Briggs, Derek E. G.; Pari, Giovanni; Santucci, Guy; Mángano, M. Gabriela; Izquierdo-López, Alejandro; Streng, Michael; Gaines, Robert R.

doi:10.1144/jgs2023-106

Cited by 2 publications

(10 citation statements)

References 63 publications

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“…The road layout has changed over the subsequent century, but comparison to other maps and aerial images indicates that this original locality lay at what is now the southwest end of the modern-day interchange between Kootenay Highway and Crowsnest Highway. This site ("locality C" in Caron et al, 2024) is herein referred to as "Cranbrook Junction" (Fig. 1.2; Appendix).…”

Section: Fossil-bearing Localities In the Cranbrook Areamentioning

confidence: 99%

“…The site is on crown land owned by the provincial government; it is well known to and frequently visited by amateur collectors. Although trilobites are by far the most common fossils, the site has yielded several specimens of Tuzoia and Anomalocaris as well as rare sponges and a pterobranch hemichordate (Caron et al, 2024). Resser (1929) described several species of Tuzoia and Anomalocaris from the Cranbrook area.…”

Section: Fossil-bearing Localities In the Cranbrook Areamentioning

confidence: 99%

“…Herein, we focus solely on the trilobite body fossils, which made up > 98% of the body fossils encountered in the measured section. Preliminary results of the fieldwork-including brief descriptions of the rest of the biota, the trace fossils, the taphonomy, the sedimentology, and the microstratigraphy-are provided elsewhere (Webster et al, 2015;Caron et al, 2024).…”

Section: Fossil-bearing Localities In the Cranbrook Areamentioning

confidence: 99%

“…Unfortunately, specimens that preserve the posterior portion of the prothorax are extremely rare (MW is aware of only three such specimens, the best of which is figured herein [Fig. 12.1, 12.2]; another is illustrated in Caron et al, 2024).…”

Section: Genusmentioning

confidence: 99%

“…Recognizing the need for a thorough examination of the Eager Formation biota, its preservation, and its paleoenvironmental setting, a Royal Ontario Museum-led expedition (JBC), involving researchers from the University of Chicago (MW), Pomona College, and the University of Saskatchewan conducted a detailed excavation during the summer of 2015 of the Cranbrook Lagerstätte at Locality B (Webster et al, 2015;Caron et al, 2024). Additional fieldwork in the Cranbrook area and adjacent regions of southeastern British Columbia was conducted by MW during 2018.…”

Section: Introductionmentioning

confidence: 99%

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Trilobites of the Cranbrook Lagerstätte (Eager Formation, Cambrian Stage 4), British Columbia

Webster,

Caron

2024

J. Paleontol.

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The Eager Formation (Cambrian Stage 4) of the Cranbrook area, British Columbia, contains abundant, sometimes beautifully preserved, trilobites and rare non-biomineralized taxa. Trilobites were first reported just over a century ago but have received little research attention, resulting in uncertainty in the number and identity of species within the assemblage and ambiguity in the age of the fauna. The trilobites of the Eager Formation in the Cranbrook area are described herein based largely upon material collected in 2015. A minimum of eight (and perhaps up to 11) trilobite species are recognized. The four species of olenelloids (Olenellus santuccii Webster n. sp., Olenellus? schofieldi, Mesonacis eagerensis, and Wanneria cranbrookense Webster n. sp.) are by far the most abundant elements of the fauna. At least two, and perhaps as many as five, species of dorypygid are present, as are two species of “ptychoparioids”. Paucity and poor preservational quality of specimens mean that the various dorypygid and “ptychoparioid” species are left in open nomenclature. Trilobite diversity in the Cranbrook Lagerstätte is comparable to that within other Lagerstätten from Cambrian Stage 4 (Series 2) of Laurentia. The diversity and abundance of trilobites, combined with biostratinomic and trace fossil data, suggest that the assemblage is autochthonous and/or parautochthonous, and that the local environment was at least periodically able to support a “typical” benthic trilobite community. The age of the Cranbrook Lagerstätte is constrained to lie within the middle Dyeran Stage of Laurentia, within what was a substantial stratigraphic gap in the distribution of Burgess Shale-type Lagerstätten. UUID: http://zoobank.org/5beab9df-6b6a-4d6d-95e8-57057cd47a66

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Section: Fossil-bearing Localities In the Cranbrook Areamentioning

confidence: 99%

Section: Fossil-bearing Localities In the Cranbrook Areamentioning

confidence: 99%

Section: Fossil-bearing Localities In the Cranbrook Areamentioning

confidence: 99%

Section: Genusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Trilobites of the Cranbrook Lagerstätte (Eager Formation, Cambrian Stage 4), British Columbia

Webster,

Caron

2024

J. Paleontol.

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Benthic pterobranchs from the Cambrian (Drumian) Marjum Konservat‐Lagerstätte of Utah

Lerosey‐Aubril,

Maletz,

Coleman

et al. 2024

Papers in Palaeontology

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Pterobranchs are rare in Cambrian strata of North America despite discoveries of more than 30 exceptionally preserved fossil biotas. Miaolingian pterobranchs from this continent typically form low‐diversity and low‐abundance assemblages. Here we describe an abundant pterobranch material from the Drumian Marjum Formation recently collected at the Gray Marjum Quarry in the House Range of Utah, USA. The faunule is composed of two new species: Sphenoecium marjumensis, an encrusting representative forming compact bushy colonies of more than 80 tubes with poorly developed rhizomes, and Tarnagraptus cupidus, an erect growing taxon characterized by intertwining stems and a monopodial colonial growth. Known in extant rhabdopleurids, this mode of colonial growth had hitherto never been observed in fossil pterobranchs. Its documentation in a c. 500‐myr‐old taxon attests to its deep origin in the evolutionary history of the group. Although the new species almost exclusively occur in the Marjum strata, this pterobranch faunule is broadly similar to those recovered from other Miaolingian Burgess Shale‐type deposits of North America in terms of genus‐level composition, species richness, and ecological structure. This may indicate that pterobranchs were poorly diverse components of animal communities at that time, or that they mostly thrived in more proximal shelf environments where conditions conducive to their preservation rarely developed. The common co‐occurrence of taxa with fundamentally different ecomorphotypes in the Miaolingian Series of North America strongly suggests an earlier phase of morphological diversification of benthic pterobranchs during the early Cambrian, which remains insufficiently documented by fossils.

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The lower Cambrian Cranbrook Lagerstätte of British Columbia

Cited by 2 publications

References 63 publications

Trilobites of the Cranbrook Lagerstätte (Eager Formation, Cambrian Stage 4), British Columbia

Trilobites of the Cranbrook Lagerstätte (Eager Formation, Cambrian Stage 4), British Columbia

Benthic pterobranchs from the Cambrian (Drumian) Marjum Konservat‐Lagerstätte of Utah

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