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Paurodendron stellatum: a new Permian permineralized herbaceous lycopsid from the Prince Charles Mountains, Antarctica
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-6723-239X
School of Botany, The University of Melbourne, Parkville, Victoria 3052, Australia.
School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK.
School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK.
2015 (English)In: Review of Palaeobotany and Palynology, ISSN 0034-6667, E-ISSN 1879-0615, Vol. 220, 1-15 p.Article in journal (Refereed) Published
Abstract [en]

Diminutive, silica-permineralized lycopsid axes, from a Guadalupian (Middle Permian) silicified peat in the Bainmedart Coal Measures of East Antarctica are described and assigned to Paurodendron stellatum sp. nov. Axes consist only of primary-growth tissues with a vascular system characterized by an exarch actinostele with 6–20 protoxylem points. Stems have a relatively narrow cortex of thin-walled cells that are commonly degraded, but the root cortex typically contains more robust, thick-walled cells. The stems bear helically inserted, elliptical–rhombic, ligulate microphylls. Roots possess an eccentrically positioned monarch vascular strand. Paurodendron stellatum is one of a very small number of anatomically preserved lycopsid axes described from the Gondwanan Permian and represents the first post-Carboniferous record of this genus. Based on dispersed vegetative remains, megaspores and microspores, herbaceous lycopsids, such as P. stellatum, appear to have been important understorey components of both low- and high-latitude mire forests of the late Palaeozoic.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 220, 1-15 p.
Keyword [en]
Heterosporous lycopsida, Isoëtales, Bainmedart Coal Measures, Lycopsid anatomy, Megaspore, Gondwana
National Category
Other Earth and Related Environmental Sciences
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-1345DOI: 10.1016/j.revpalbo.2015.04.004OAI: oai:DiVA.org:nrm-1345DiVA: diva2:862071
Projects
Reconstructing the lost forests of Antarctica: the palaeoecology, anatomy and phylogeny of the iconic Glossopteris floraExceptional permineralized biotas - windows into the evolution and functional diversity of terrestrial ecosystems through time
Funder
Swedish Research Council, VR 2010-3931Swedish Research Council, VR 2014-5234
Available from: 2015-07-31 Created: 2015-10-20 Last updated: 2015-12-02Bibliographically approved

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Publisher's full texthttp://dx.doi.org/10.1016/j.revpalbo.2015.04.004

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McLoughlin, Stephen

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