Callixylon seamrogia sp. nov., a new species from the uppermost Famennian (Upper Devonian) of Ireland

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dc.check.date2026-12-12en
dc.check.infoAccess to this article is restricted until 24 months after publication by request of the publisheren
dc.contributor.authorDurieux, Thibaulten
dc.contributor.authorDecombeix, Anne-Laureen
dc.contributor.authorHarper, Carla J.en
dc.contributor.authorRamel, Merlinen
dc.contributor.authorMays, Chrisen
dc.contributor.authorPrestianni, Cyrilleen
dc.contributor.funderTrinity College Dublinen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderDECAen
dc.contributor.funderInstitut national des sciences de l'Universen
dc.contributor.funderConseil National de la Recherche Scientifiqueen
dc.contributor.funderIrish Research Councilen
dc.contributor.funderMinistère de l'Europe et des Affaires Étrangèresen
dc.date.accessioned2025-01-15T15:40:33Z
dc.date.available2025-01-15T15:40:33Z
dc.date.issued2024-12-12en
dc.description.abstractThe fossil record of the Devonian tree Archaeopteris/Callixylon is extensive worldwide, however, the underground parts of these plants remain scarcely known. To date, there are only three studies that provide detailed anatomical descriptions of their roots. This study describes new anatomically preserved roots and stems of Callixylon from uppermost Famennian (Upper Devonian) deposits of Sandeel Bay, County Wexford, Ireland. The wood is characterized by tracheids with the pitting pattern typical of Callixylon (i.e., radial pits forming groups separated by non-pitted areas), and the presence of numerous ray tracheids that are smaller than the parenchyma ray cells in tangential section and unevenly arranged inside the rays. The roots are characterized by a three-lobed actinostele with multiple exarch protoxylem strands, an unusual organization reported for the first time in Callixylon roots. The stems are eustelic, with a heterocellular pith composed of thin and some thick-walled cells. Based on their unique combination of characters, the specimens are assigned to a new species, Callixylon seamrogia, the first species of Callixylon reported from Ireland. Based on comparisons with previous architectural studies of Callixylon, the stems are hypothesized to correspond to main axes of the new species, one of them bearing an apically emitted non-persistent branch. These new specimens from Ireland provide new information on the rooting system of Archaeopteris/Callixylon and improve our understanding of the anatomical and systematic diversity within the genus.en
dc.description.sponsorshipTrinity College Dublin (Provost's Award); DECA and CNRS and Institut National des Sciences de l'Univers (Tellus-Interrvie grant); Irish Research Council and Ministère de l'Europe et des Affaires Étrangères (#47212TK); Science Foundation Ireland (22/FFP-P/11448)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid105256en
dc.identifier.citationDurieux, T., Decombeix, A. L., Harper, C. J., Ramel, M., Mays, C. and Prestianni, C. (2024) 'Callixylon seamrogia sp. nov., a new species from the uppermost Famennian (Upper Devonian) of Ireland', Review of Palaeobotany and Palynology, 334, p.105256 (14pp). https://doi.org/10.1016/j.revpalbo.2024.105256en
dc.identifier.doi10.1016/j.revpalbo.2024.105256en
dc.identifier.endpage14en
dc.identifier.issn0034-6667en
dc.identifier.journaltitleReview of Palaeobotany and Palynologyen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/16833
dc.identifier.volume334en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.relation.ispartofReview of Palaeobotany and Palynologyen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres Programme::Phase 2/13/RC/2092_P2/IE/iCRAG_Phase 2/en
dc.rights© 2024, Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAnatomyen
dc.subjectArchaeopterisen
dc.subjectDevonianen
dc.subjectProgymnospermen
dc.subjectRooten
dc.subjectStemen
dc.titleCallixylon seamrogia sp. nov., a new species from the uppermost Famennian (Upper Devonian) of Irelanden
dc.typeArticle (peer-reviewed)en
oaire.citation.volume334en
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