2020
DOI: 10.1017/jpa.2020.32
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Paleocommunity composition, relative abundance, and new camerate crinoids from the Brechin Lagerstätte (Upper Ordovician)

Abstract: The Brechin Lagerstätte of southern Ontario contains an exceptionally diverse and well-preserved Late Ordovician (Katian) crinoid fauna. We describe four genera and eight species of camerate crinoids from the Brechin Lagerstätte, including six new species. Consequently, the total diversity of the fauna now stands at 27 genera and 39 nominal species, thereby making it the most taxonomically diverse Ordovician crinoid fauna known. Taxa described include the diplobathrid Pararchaeocrinus kiddi new species and the… Show more

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Cited by 6 publications
(14 citation statements)
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References 61 publications
(99 reference statements)
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“…As a result, both paleocommunities should be broadly representative of Laurentian crinoid faunas during these stages of the Upper Ordovician. For example, the relative proportions of major groups that make up the Brechin fauna are comparable to those of other Katian-age crinoid assemblages (Cole et al, 2017;Cole et al, 2020).…”
Section: Characteristics Of the Bromide And Brechin Crinoid Faunasmentioning
confidence: 84%
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“…As a result, both paleocommunities should be broadly representative of Laurentian crinoid faunas during these stages of the Upper Ordovician. For example, the relative proportions of major groups that make up the Brechin fauna are comparable to those of other Katian-age crinoid assemblages (Cole et al, 2017;Cole et al, 2020).…”
Section: Characteristics Of the Bromide And Brechin Crinoid Faunasmentioning
confidence: 84%
“…Peak genus-level diversity was reached during the Katian stage of the Upper Ordovician before it dropped precipitously during the Late Ordovician mass extinction across the Katian-Hirnantian boundary (Peters & Ausich, 2008;Wright & Toom, 2017;Cole, 2018). The rapid increase in crinoid genus and species diversity led to greater morphological and ecological variation during Upper Ordovician (Foote, 1994(Foote, , 1999Deline & Ausich, 2011;Wright, 2017a;Deline et al, 2018Deline et al, , 2020Cole & Hopkins, 2021) and increases in community complexity (Cole et al, 2020). As a result, the Upper Ordovician is dynamic interval of time in crinoid evolutionary history that is ideal for evaluating the evolution of niche occupation and community assembly in early crinoid communities.…”
Section: Characteristics Of the Bromide And Brechin Crinoid Faunasmentioning
confidence: 99%
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“…We coded Tallinnicrinus for the same 135 discrete morphological characters used in the analysis of Cole (2018) and pruned the matrix to include only Ordovician – early Silurian genera, which produced a phylogenetic matrix with a total of 55 taxa (Cole et al . 2020b). Although pruning taxa that are middle Silurian or younger from the matrix could affect phylogenetic results, the matrix still includes all major lineages of diplobathrids and all known diplobathrid genera occurring c .…”
Section: Methodsmentioning
confidence: 99%