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Article

The Palaeobiology of Two Crown Group Cnidarians: Haootia quadriformis and Mamsetia manunis gen. et sp. nov. from the Ediacaran of Newfoundland, Canada

by
D. McIlroy
1,*,
G. Pasinetti
1,
D. Pérez-Pinedo
1,
C. McKean
1,
S. C. Dufour
2,
J. J. Matthews
3,
L. R. Menon
4,
R. Nicholls
5 and
R. S. Taylor
1
1
Department of Earth Sciences, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
2
Department of Biology, Memorial University of Newfoundland, St. John’s, NL A1C 5S7, Canada
3
Museum of Natural History, University of Oxford, Oxford OX3 7DQ, UK
4
Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK
5
BobNichollsArt, Bristol BS161QY, UK
*
Author to whom correspondence should be addressed.
Life 2024, 14(9), 1096; https://doi.org/10.3390/life14091096
Submission received: 18 July 2024 / Revised: 5 August 2024 / Accepted: 7 August 2024 / Published: 30 August 2024
(This article belongs to the Special Issue Back to Basics in Palaeontology)

Abstract

The Ediacaran of eastern Newfoundland preserves the world’s oldest known eumetazoan body fossils, as well as the earliest known record of fossilized muscular tissue. Re-examination of the holotype of the eight-armed Haootia quadriformis in terms of its morphology, the arrangement of its muscle filament bundles, and hitherto undescribed aspects of its anatomy support its interpretation as a crown staurozoan. We also document several new fossils preserving muscle tissue with a different muscular architecture to Haootia, but with only four arms. This new material allows us to describe a new crown group staurozoan, Mamsetia manunis gen. et sp. nov. This work confirms the presence of crown group medusozoan cnidarians of the Staurozoa in the Ediacaran of Newfoundland circa 565 Ma.
Keywords: Ediacaran; Cnidaria; fossil; taphonomy; biostratinomy; Staurozoa; proterozoic Ediacaran; Cnidaria; fossil; taphonomy; biostratinomy; Staurozoa; proterozoic

Share and Cite

MDPI and ACS Style

McIlroy, D.; Pasinetti, G.; Pérez-Pinedo, D.; McKean, C.; Dufour, S.C.; Matthews, J.J.; Menon, L.R.; Nicholls, R.; Taylor, R.S. The Palaeobiology of Two Crown Group Cnidarians: Haootia quadriformis and Mamsetia manunis gen. et sp. nov. from the Ediacaran of Newfoundland, Canada. Life 2024, 14, 1096. https://doi.org/10.3390/life14091096

AMA Style

McIlroy D, Pasinetti G, Pérez-Pinedo D, McKean C, Dufour SC, Matthews JJ, Menon LR, Nicholls R, Taylor RS. The Palaeobiology of Two Crown Group Cnidarians: Haootia quadriformis and Mamsetia manunis gen. et sp. nov. from the Ediacaran of Newfoundland, Canada. Life. 2024; 14(9):1096. https://doi.org/10.3390/life14091096

Chicago/Turabian Style

McIlroy, D., G. Pasinetti, D. Pérez-Pinedo, C. McKean, S. C. Dufour, J. J. Matthews, L. R. Menon, R. Nicholls, and R. S. Taylor. 2024. "The Palaeobiology of Two Crown Group Cnidarians: Haootia quadriformis and Mamsetia manunis gen. et sp. nov. from the Ediacaran of Newfoundland, Canada" Life 14, no. 9: 1096. https://doi.org/10.3390/life14091096

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