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Ontogeny of the trilobite Redlichia from the lower Cambrian (Series 2, Stage 4) Ramsay Limestone of South Australia

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dc.contributor.authorHolmes, J.D.
dc.contributor.authorPaterson, J.R.
dc.contributor.authorJago, J.B.
dc.contributor.authorGarcia-Bellido, D.C.
dc.date.issued2021
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>Studies that reveal detailed information about trilobite growth, particularly early developmental stages, are crucial for improving our understanding of the phylogenetic relationships within this iconic group of fossil arthropods. Here we document an essentially complete ontogeny of the trilobite <jats:italic>Redlichia</jats:italic> cf. <jats:italic>versabunda</jats:italic> from the Cambrian Series 2 (late Stage 4) Ramsay Limestone of Yorke Peninsula in South Australia, including some of the best-preserved protaspides (the earliest biomineralized trilobite larval stage) known for any Cambrian trilobite. These protaspid stages exhibit similar morphological characteristics to many other taxa within the Suborder Redlichiina, especially to closely related species such as <jats:italic>Metaredlichia cylindrica</jats:italic> from the early Cambrian period of China. Morphological patterns observed across early developmental stages of different groups within the Order Redlichiida are discussed. Although redlichiine protaspides exhibit similar overall morphologies, certain ontogenetic characters within this suborder have potential phylogenetic signal, with different superfamilies characterized by unique trait combinations in these early growth stages.</jats:p>
dc.identifier.citationGeological Magazine, 2021; 158(7):1209-1223
dc.identifier.doi10.1017/S0016756820001259
dc.identifier.issn0016-7568
dc.identifier.issn1469-5081
dc.identifier.orcidHolmes, J.D. [0000-0001-8804-2149]
dc.identifier.orcidGarcia-Bellido, D.C. [0000-0003-1922-9836]
dc.identifier.urihttps://hdl.handle.net/11541.2/146316
dc.language.isoen
dc.publisherCambridge University Press (CUP)
dc.relation.fundingAustralian Government Research Training Scheme
dc.relation.fundingUniversity of Adelaide Constance Fraser Supplementary Scholarship
dc.rightsCopyright 2020 The author(s), published by Cambridge University Press
dc.source.urihttps://doi.org/10.1017/S0016756820001259
dc.subjectarthropod
dc.subjectearly Cambrian
dc.subjectmeraspid
dc.subjectproaspid
dc.subjectRedlichiida
dc.subjectRedlichiidae
dc.titleOntogeny of the trilobite Redlichia from the lower Cambrian (Series 2, Stage 4) Ramsay Limestone of South Australia
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9916469508401831

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