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Data from: Early Pennsylvanian (Langsettian) fish assemblages from the Joggins Formation, Canada, and their implications for palaeoecology and palaeogeography

Data from: Early Pennsylvanian (Langsettian) fish assemblages from the Joggins Formation, Canada, and their implications for palaeoecology and palaeogeography
Data from: Early Pennsylvanian (Langsettian) fish assemblages from the Joggins Formation, Canada, and their implications for palaeoecology and palaeogeography
A review of all available specimens of fossil fishes from the classic Pennsylvanian Joggins locality of Nova Scotia, Canada, reveals the existence of a diverse community of chondrichthyans (xenacanthids, ctenacanthids and the enigmatic Ageleodus), acanthodians (gyracanthids), sarcopterygians (rhizodontids, megalichthyids, rhizodopsids and dipnoans) and actinopterygians (haplolepids). Reassessment of supposed endemic species (Ctenoptychius cristatus, Sagenodus plicatus, Gyracanthus duplicatus) indicates they are invalid, and overall, the assemblage comprises cosmopolitan taxa that were widespread around the coasts of tropical Pangaea. Strontium isotope analysis of fish remains and a critical study of their facies context suggest that these fish communities occupied bodies of water with salinities across the marine–freshwater spectrum. This preponderance of euryhaline forms implies a community structure quite distinct from that of today and might represent a transitory phase prior to the establishment of fully freshwater fish communities. Interpretation of fish ecology provides further evidence that the Joggins Formation was deposited in a paralic setting, and the recognition of one previously undetected brackish incursion strengthens the link between sedimentary cycles at Joggins and Milankovitch-induced glacio-eustatic change. Furthermore, interregional correlation of these marine transgressions supports palynostratigraphical arguments for an early Langsettian age for the Joggins Formation. This places tighter constraints on the age of the earliest known crown amniote, Hylonomus lyelli, an important calibration point used in phylogenomic studies.,Appendix S1Excel file containing a complete list of all known fossil fish specimens from Joggins accessioned in museum collections, with revised identification where appropriate. Abbreviations in 'specimen examined?' column: Y = yes; N = no; P = only photograph(s) of specimen examined.,
DRYAD
Carpenter, David K.
7e85c586-af81-4a0d-bcd1-27cd4a5187f2
Falcon-Lang, Howard J.
11bb5611-02b4-4e8e-a7b6-3f8fea812a34
Benton, Michael J.
a0bcafa3-53ea-40ed-ae67-313e957904e0
Grey, Melissa
73b10989-edea-43ef-93cb-4c6deedbc255
Carpenter, David K.
7e85c586-af81-4a0d-bcd1-27cd4a5187f2
Falcon-Lang, Howard J.
11bb5611-02b4-4e8e-a7b6-3f8fea812a34
Benton, Michael J.
a0bcafa3-53ea-40ed-ae67-313e957904e0
Grey, Melissa
73b10989-edea-43ef-93cb-4c6deedbc255

Falcon-Lang, Howard J., Benton, Michael J. and Grey, Melissa (2015) Data from: Early Pennsylvanian (Langsettian) fish assemblages from the Joggins Formation, Canada, and their implications for palaeoecology and palaeogeography. DRYAD doi:10.5061/dryad.b0551 [Dataset]

Record type: Dataset

Abstract

A review of all available specimens of fossil fishes from the classic Pennsylvanian Joggins locality of Nova Scotia, Canada, reveals the existence of a diverse community of chondrichthyans (xenacanthids, ctenacanthids and the enigmatic Ageleodus), acanthodians (gyracanthids), sarcopterygians (rhizodontids, megalichthyids, rhizodopsids and dipnoans) and actinopterygians (haplolepids). Reassessment of supposed endemic species (Ctenoptychius cristatus, Sagenodus plicatus, Gyracanthus duplicatus) indicates they are invalid, and overall, the assemblage comprises cosmopolitan taxa that were widespread around the coasts of tropical Pangaea. Strontium isotope analysis of fish remains and a critical study of their facies context suggest that these fish communities occupied bodies of water with salinities across the marine–freshwater spectrum. This preponderance of euryhaline forms implies a community structure quite distinct from that of today and might represent a transitory phase prior to the establishment of fully freshwater fish communities. Interpretation of fish ecology provides further evidence that the Joggins Formation was deposited in a paralic setting, and the recognition of one previously undetected brackish incursion strengthens the link between sedimentary cycles at Joggins and Milankovitch-induced glacio-eustatic change. Furthermore, interregional correlation of these marine transgressions supports palynostratigraphical arguments for an early Langsettian age for the Joggins Formation. This places tighter constraints on the age of the earliest known crown amniote, Hylonomus lyelli, an important calibration point used in phylogenomic studies.,Appendix S1Excel file containing a complete list of all known fossil fish specimens from Joggins accessioned in museum collections, with revised identification where appropriate. Abbreviations in 'specimen examined?' column: Y = yes; N = no; P = only photograph(s) of specimen examined.,

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Published date: 1 January 2015

Identifiers

Local EPrints ID: 449107
URI: http://eprints.soton.ac.uk/id/eprint/449107
PURE UUID: af836cdf-e0c0-456f-b3d1-70ee418af9fe

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Date deposited: 17 May 2021 16:33
Last modified: 15 Dec 2021 02:22

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Contributors

Contributor: David K. Carpenter
Creator: Howard J. Falcon-Lang
Creator: Michael J. Benton
Creator: Melissa Grey

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