First evidence of attached juveniles in the solutan echinoderm Pahvanticystis from the middle Cambrian Weeks Formation (Utah, USA)
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2025
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The fossil record of the Palaeozoic echinoderm class Soluta suggests they originated in the Miaolingian (middle Cambrian) of Laurentia as permanently attached suspension feeders, demonstrating a stepwise shift towards vagility in successive strata. Here, we report a new specimen of Pahvanticystis cf. utahensis associated with three putative juveniles interpreted as belonging to the same species. We interpret this as evidence of facultative attachment in juveniles of Pahvanticystis, which had not previously been reported in this taxon, but is known in the earlier genus Castericystis. Our findings indicate that attachment as a juvenile was more widespread in solutans than previously thought.
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Savage, Harry, and Imran Rahman. “First Evidence of Attached Juveniles in the Solutan Echinoderm Pahvanticystis from the Middle Cambrian Weeks Formation (Utah, USA).” Acta Palaeontologica Polonica, vol. 70, no. 1, 2025, https://doi.org/10.4202/app.01228.2024. Accessed 1 Apr. 2025.
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Copyright © 2025 H.J. Savage and I.A. Rahman. This is an open-access article distributed under the terms of the Creative Commons Attribution License (for details please see http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The linked file is the published version of the article.
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0567-7920