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Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland

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Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland. / Liu, Alex G S C; McIlroy, Duncan; Matthews, Jack; Brasier, Martin D.

In: PALAIOS, Vol. 29, No. 8, 21.11.2014, p. 420-430.

Research output: Contribution to journalArticle

Harvard

Liu, AGSC, McIlroy, D, Matthews, J & Brasier, MD 2014, 'Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland', PALAIOS, vol. 29, no. 8, pp. 420-430. https://doi.org/10.2110/palo.2014.011

APA

Liu, A. G. S. C., McIlroy, D., Matthews, J., & Brasier, M. D. (2014). Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland. PALAIOS, 29(8), 420-430. https://doi.org/10.2110/palo.2014.011

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Author

Liu, Alex G S C ; McIlroy, Duncan ; Matthews, Jack ; Brasier, Martin D. / Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland. In: PALAIOS. 2014 ; Vol. 29, No. 8. pp. 420-430.

Bibtex

@article{7bfc32ff586e4b70bfbe009e4fd3c21a,
title = "Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland",
abstract = "Surface locomotory trace fossils from the Mistaken Point Formation of Newfoundland, dated at ∼565 Ma, suggest that organisms capable of controlled locomotion and possessing muscular tissue may have existed among Avalonian Ediacaran macrofossil assemblages. Here we describe the Mistaken Point trace-fossil assemblage in full, discuss its stratigraphic context within the Mistaken Point Formation, and explore the competing hypotheses for the formation of the traces. We find that the trace fossils, preserved within a turbidite succession in a deep-marine depositional environment, are not attributable to abiogenic structures, to Ediacaran tubular or filamentous body fossils, to rangeomorph stems, or to a host of late Ediacaran and early Phanerozoic ichnofossils. Specimens within the assemblage show some similarities to the ichnogenera Helminthoidichnites and Archaeonassa, but discrepancies in certain aspects of their structure mean that we do not formally attribute them to these ichnotaxa at this time. The Mistaken Point ichnofossils possess morphological characteristics indicative of formation by an organism with a round base. Comparison with traces formed by modern organisms of such character appears to rule out formation by protistan, echinoderm, or annelid styles of movement, but is consistent with organisms moving via muscular controlled locomotion in a similar way to some modern mollusks and actinian cnidarians. We suggest therefore that the Mistaken Point trace-fossil assemblage reveals the presence of muscular metazoans in late Ediacaran deep-marine ecosystems. Such organisms cannot yet be attributed to specific phyla, but their inferred locomotory mechanisms share closest similarities with those utilized by extant actinians.",
author = "Liu, {Alex G S C} and Duncan McIlroy and Jack Matthews and Brasier, {Martin D.}",
note = "Date of Acceptance: 14/08/2014",
year = "2014",
month = "11",
day = "21",
doi = "10.2110/palo.2014.011",
language = "English",
volume = "29",
pages = "420--430",
journal = "PALAIOS",
issn = "0883-1351",
publisher = "SEPM Society for Sedimentary Geology",
number = "8",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Confirming the metazoan character of a 565Ma trace-fossil assemblage from Mistaken Point, Newfoundland

AU - Liu, Alex G S C

AU - McIlroy, Duncan

AU - Matthews, Jack

AU - Brasier, Martin D.

N1 - Date of Acceptance: 14/08/2014

PY - 2014/11/21

Y1 - 2014/11/21

N2 - Surface locomotory trace fossils from the Mistaken Point Formation of Newfoundland, dated at ∼565 Ma, suggest that organisms capable of controlled locomotion and possessing muscular tissue may have existed among Avalonian Ediacaran macrofossil assemblages. Here we describe the Mistaken Point trace-fossil assemblage in full, discuss its stratigraphic context within the Mistaken Point Formation, and explore the competing hypotheses for the formation of the traces. We find that the trace fossils, preserved within a turbidite succession in a deep-marine depositional environment, are not attributable to abiogenic structures, to Ediacaran tubular or filamentous body fossils, to rangeomorph stems, or to a host of late Ediacaran and early Phanerozoic ichnofossils. Specimens within the assemblage show some similarities to the ichnogenera Helminthoidichnites and Archaeonassa, but discrepancies in certain aspects of their structure mean that we do not formally attribute them to these ichnotaxa at this time. The Mistaken Point ichnofossils possess morphological characteristics indicative of formation by an organism with a round base. Comparison with traces formed by modern organisms of such character appears to rule out formation by protistan, echinoderm, or annelid styles of movement, but is consistent with organisms moving via muscular controlled locomotion in a similar way to some modern mollusks and actinian cnidarians. We suggest therefore that the Mistaken Point trace-fossil assemblage reveals the presence of muscular metazoans in late Ediacaran deep-marine ecosystems. Such organisms cannot yet be attributed to specific phyla, but their inferred locomotory mechanisms share closest similarities with those utilized by extant actinians.

AB - Surface locomotory trace fossils from the Mistaken Point Formation of Newfoundland, dated at ∼565 Ma, suggest that organisms capable of controlled locomotion and possessing muscular tissue may have existed among Avalonian Ediacaran macrofossil assemblages. Here we describe the Mistaken Point trace-fossil assemblage in full, discuss its stratigraphic context within the Mistaken Point Formation, and explore the competing hypotheses for the formation of the traces. We find that the trace fossils, preserved within a turbidite succession in a deep-marine depositional environment, are not attributable to abiogenic structures, to Ediacaran tubular or filamentous body fossils, to rangeomorph stems, or to a host of late Ediacaran and early Phanerozoic ichnofossils. Specimens within the assemblage show some similarities to the ichnogenera Helminthoidichnites and Archaeonassa, but discrepancies in certain aspects of their structure mean that we do not formally attribute them to these ichnotaxa at this time. The Mistaken Point ichnofossils possess morphological characteristics indicative of formation by an organism with a round base. Comparison with traces formed by modern organisms of such character appears to rule out formation by protistan, echinoderm, or annelid styles of movement, but is consistent with organisms moving via muscular controlled locomotion in a similar way to some modern mollusks and actinian cnidarians. We suggest therefore that the Mistaken Point trace-fossil assemblage reveals the presence of muscular metazoans in late Ediacaran deep-marine ecosystems. Such organisms cannot yet be attributed to specific phyla, but their inferred locomotory mechanisms share closest similarities with those utilized by extant actinians.

U2 - 10.2110/palo.2014.011

DO - 10.2110/palo.2014.011

M3 - Article

VL - 29

SP - 420

EP - 430

JO - PALAIOS

JF - PALAIOS

SN - 0883-1351

IS - 8

ER -