The Digital Atlas of Ordovician Life: digitizing and mobilizing data for paleontologists and the public; pp. 312–316

Stigall, Alycia L.; Bauer, Jennifer E.; Brame, Hannah-Maria R.

doi:10.3176/earth.2014.36

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…The Ordovician Atlas is being developed using the holdings of the Ohio University Invertebrate Paleontology Collection, the Limper Museum at Miami University, and the Cincinnati Museum Center. For additional details on the Ordovician Atlas of Ancient Life, see Stigall et al (2014b).…”

Section: Project Overview Focusmentioning

confidence: 99%

The Digital Atlas of Ancient Life: delivering information on paleontology and biogeography via the web

Hendricks

Stigall

Lieberman

2015

Palaeontologia Electronica

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Section: Project Overview Focusmentioning

confidence: 99%

The Digital Atlas of Ancient Life: delivering information on paleontology and biogeography via the web

Hendricks

Stigall

Lieberman

2015

Palaeontologia Electronica

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Dispersal in the Ordovician: Speciation patterns and paleobiogeographic analyses of brachiopods and trilobites

Lam

Stigall

Matzke

2018

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Middle to Late Ordovician was a time of profound biotic diversification, paleoecological change, and major climate shifts. Yet studies examining speciation mechanisms and drivers of dispersal are lacking. In this study, we use Bayesian phylogenetics and maximum likelihood analyses in the R package BioGeoBEARS to reanalyze ten published data matrices of brachiopods and trilobites and produce time-calibrated species-level phylogenetic hypotheses with estimated biogeographic histories. Recovered speciation and biogeographic patterns were examined within four time slices to test for changes in speciation type across major tectonic and paleoclimatic events. Statistical model comparison showed that biogeographic models that ACCEPTED MANUSCRIPTA C C E P T E D M A N U S C R I P T 2 incorporate long-distance founder-event speciation best fit the data for most clades, which indicates that this speciation type, along with vicariance and traditional dispersal, were important for Paleozoic benthic invertebrates. Speciation by dispersal was common throughout the study interval, but notably elevated during times of climate change. Vicariance events occurred synchronously among brachiopod and trilobite lineages, indicating that tectonic, climate, and ocean processes affected benthic and planktotrophic larvae similarly. Middle Ordovician interoceanic dispersal in trilobite lineages was influenced by surface currents along with volcanic island arcs acting as "stepping stones" between areas, indicating most trilobite species may have had a planktic protaspid stage. These factors also influenced brachiopod dispersal across oceanic basins among Laurentia, Avalonia, and Baltica. These results indicate that gyre spin-up and intensification of surface currents were important dispersal mechanisms during this time. Within Laurentia, surface currents, hurricane tracks, and upwelling zones controlled dispersal among basins. Increased speciation during the Middle Ordovician provides support for climatic facilitators for diversification during the Great Ordovician Biodiversification Event. Similarly, increased speciation in Laurentian brachiopod lineages during the Hirnantian indicates that some taxa experienced speciation in relation to major climate changes. Overall, this study demonstrates the substantial power and potential for likelihood-based methods for elucidating biotic patterns during the history of life.

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A review of the Late Ordovician (Katian) Richmondian Invasion of eastern Laurentia

Stigall

2023

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Digital Atlas of Ordovician Life: digitizing and mobilizing data for paleontologists and the public; pp. 312–316

Cited by 5 publications

References 3 publications

The Digital Atlas of Ancient Life: delivering information on paleontology and biogeography via the web

The Digital Atlas of Ancient Life: delivering information on paleontology and biogeography via the web

Dispersal in the Ordovician: Speciation patterns and paleobiogeographic analyses of brachiopods and trilobites

A review of the Late Ordovician (Katian) Richmondian Invasion of eastern Laurentia

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