ArticleProceedings. Biological sciences2014
Haootia quadriformis n. gen., n. sp., interpreted as a muscular cnidarian impression from the Late Ediacaran period (approx. 560 Ma).
Article in Proceedings. Biological sciences, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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21 citing papers in PubMed.
- The Palaeobiology of Two Crown Group Cnidarians:Life (Basel, Switzerland) · 2024Article
- Early evolution of the ecdysozoan body plan.eLife · 2024Article
- Review
- A late-Ediacaran crown-group sponge animal.Nature · 2024Article
- Developmental biology ofProceedings. Biological sciences · 2024Article
- 'Conga lines' of Ediacaran fronds: insights into the reproductive biology of early metazoans.Royal Society open science · 2024Article
- Musculature of an Early Cambrian cycloneuralian animal.Proceedings. Biological sciences · 2023Article
- Coevolution of the Tlx homeobox gene with medusa development (Cnidaria: Medusozoa).Communications biology · 2023Article
- Article
- Causes and consequences of end-Ediacaran extinction: An update.Cambridge prisms. Extinction · 2023Review
- Muscle systems and motility of early animals highlighted by cnidarians from the basal Cambrian.eLife · 2022Article
- Were the First Trace Fossils Really Burrows or Could They Have Been Made by Sediment-Displacive Chemosymbiotic Organisms?Life (Basel, Switzerland) · 2022Review
- Phylogenomics Identifies an Ancestral Burst of Gene Duplications Predating the Diversification of Aphidomorpha.Molecular biology and evolution · 2020Article
- Discovery of bilaterian-type through-guts in cloudinomorphs from the terminal Ediacaran Period.Nature communications · 2020Article
- Oxygen, temperature and the deep-marine stenothermal cradle of Ediacaran evolution.Proceedings. Biological sciences · 2018Article
- Origin of animal multicellularity: precursors, causes, consequences-the choanoflagellate/sponge transition, neurogenesis and the Cambrian explosion.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Review
- Article
- Complex Homology and the Evolution of Nervous Systems.Trends in ecology & evolution · 2016Review
- Uncertainty in the Timing of Origin of Animals and the Limits of Precision in Molecular Timescales.Current biology : CB · 2015Article
- Is Haootia quadriformis related to extant Staurozoa (Cnidaria)? Evidence from the muscular system reconsidered.Proceedings. Biological sciences · 2015Article
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Abstract
Muscle tissue is a fundamentally eumetazoan attribute. The oldest evidence for fossilized muscular tissue before the Early Cambrian has hitherto remained moot, being reliant upon indirect evidence in the form of Late Ediacaran ichnofossils. We here report a candidate muscle-bearing organism, Haootia quadriformis n. gen., n. sp., from approximately 560 Ma strata in Newfoundland, Canada. This taxon exhibits sediment moulds of twisted, superimposed fibrous bundles arranged quadrilaterally, extending into four prominent bifurcating corner branches. Haootia is distinct from all previously published contemporaneous Ediacaran macrofossils in its symmetrically fibrous, rather than frondose, architecture. Its bundled fibres, morphology, and taphonomy compare well with the muscle fibres of fossil and extant Cnidaria, particularly the benthic Staurozoa. Haootia quadriformis thus potentially provides the earliest body fossil evidence for both metazoan musculature, and for Eumetazoa, in the geological record.
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