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Paleobiogeography, paleoecology, diversity, and speciation patterns in the Eublastoidea (Blastozoa, Echinodermata)

Jennifer E. Bauer
Paleobiogeography, paleoecology, diversity, and speciation patterns in the Eublastoidea (Blastozoa, Echinodermata) (in Phylogenetic paleoecology, James C. Lamsdell (editor) and Curtis R. Congreve (editor))
Paleobiology (March 2021) 47 (2): 221-235


Understanding the distribution of taxa in space and time is key to understanding diversity dynamics. The fossil record provides an avenue to assess these patterns on vast timescales and through major global changes. The Eublastoidea were a conservatively plated Paleozoic echinoderm clade that range from the middle Silurian to the end-Permian. The geographic distribution of the eublastoids, as a whole, has been qualitatively assessed but has historically lacked a quantitative analysis. This is the first examination of the Eublastoidea using probabilistic methods within the R package BioGeoBEARS to assess macroevolutionary trends. Results provide an updated understanding of eublastoid diversity with new peaks and troughs in diversity through their evolutionary history. Lithology is examined in an evolutionary framework and does not have clear evolutionary trends, and there is much work to be done regarding environmental preferences. Biogeographic patterns do not recover precise group origins but do support the previous work that outlines Eublastoidea as a Laurentian clade. Sympatric speciation events dominant the clade's history but are likely exaggerated due to the highly combined areas. Vicariance events are rare and restricted to the Silurian and Devonian, and dispersal events are more common throughout the evolutionary history. Pathways allowing for lineage migrations are noted between southern Laurussia and China in the Devonian and Carboniferous and southern Laurussia and eastern Gondwana in the Carboniferous. Future work will include the addition of more non-Laurentian species into the estimated phylogeny to better estimate these global patterns.

ISSN: 0094-8373
EISSN: 1938-5331
Serial Title: Paleobiology
Serial Volume: 47
Serial Issue: 2
Title: Paleobiogeography, paleoecology, diversity, and speciation patterns in the Eublastoidea (Blastozoa, Echinodermata)
Title: Phylogenetic paleoecology
Author(s): Bauer, Jennifer E.
Author(s): Lamsdell, James C.editor
Author(s): Congreve, Curtis R.editor
Affiliation: University of Michigan at Ann Arbor, Museum of Paleontology, Ann Arbor, MI, United States
Affiliation: West Virginia University, Department of Geology and Geography, Morgantown, WV, United States
Pages: 221-235
Published: 202103
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
Meeting name: Geological Society of America 2018 annual meeting; Phylogenetic paleoecology; macroecology within an evolutionary framework topical session
Meeting location: Indianapolis, IN, USA, United States
Meeting date: 20181104Nov. 4-7, 2018
References: 47
Accession Number: 2021-049066
Categories: Invertebrate paleontology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Annotation: NSF Grant DRL-1322725
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2021
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