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A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)

Abstract. Tobleriabicuspis, a coniferophyte seed cone, is described from the Jambi Palaeoflora, Sumatra of Asselian (early Permian) age. A morphometric analysis based on cones, paired fertile units, and fertile and sterile scales, demonstrates their close relationship. Small paired fertile units occ...

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Detalles Bibliográficos
Autor principal: M. Van Waveren, Isabel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pensoft Publishers 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6443619/
https://www.ncbi.nlm.nih.gov/pubmed/31015778
http://dx.doi.org/10.3897/phytokeys.119.29555
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author M. Van Waveren, Isabel
author_facet M. Van Waveren, Isabel
author_sort M. Van Waveren, Isabel
collection PubMed
description Abstract. Tobleriabicuspis, a coniferophyte seed cone, is described from the Jambi Palaeoflora, Sumatra of Asselian (early Permian) age. A morphometric analysis based on cones, paired fertile units, and fertile and sterile scales, demonstrates their close relationship. Small paired fertile units occur mainly in cones. Medium-sized paired fertile units occur mainly on scales. And large paired fertile units are mainly dispersed. The cones are considered female and the paired fertile units are considered to represent the seeds. The cones are composed of helicoidal, bilaterally symmetrical and deeply incised scales with paired seeds. A comparison can be made with the Voltziales female taxon Schizolepis from the Triassic and Jurassic. Tobleria is regarded as having a voltzian Voltziales affinity and dates from approximately 16 to 26 million years before any other such cones.
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spelling pubmed-64436192019-04-23 A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia) M. Van Waveren, Isabel PhytoKeys Review Article Abstract. Tobleriabicuspis, a coniferophyte seed cone, is described from the Jambi Palaeoflora, Sumatra of Asselian (early Permian) age. A morphometric analysis based on cones, paired fertile units, and fertile and sterile scales, demonstrates their close relationship. Small paired fertile units occur mainly in cones. Medium-sized paired fertile units occur mainly on scales. And large paired fertile units are mainly dispersed. The cones are considered female and the paired fertile units are considered to represent the seeds. The cones are composed of helicoidal, bilaterally symmetrical and deeply incised scales with paired seeds. A comparison can be made with the Voltziales female taxon Schizolepis from the Triassic and Jurassic. Tobleria is regarded as having a voltzian Voltziales affinity and dates from approximately 16 to 26 million years before any other such cones. Pensoft Publishers 2019-03-25 /pmc/articles/PMC6443619/ /pubmed/31015778 http://dx.doi.org/10.3897/phytokeys.119.29555 Text en Isabel M. Van Waveren http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Review Article
M. Van Waveren, Isabel
A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)
title A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)
title_full A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)
title_fullStr A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)
title_full_unstemmed A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)
title_short A morphometric analysis of Tobleriabicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia)
title_sort morphometric analysis of tobleriabicuspis, a voltziales seed cone from the early permian jambi palaeoflora, sumatra (indonesia)
topic Review Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6443619/
https://www.ncbi.nlm.nih.gov/pubmed/31015778
http://dx.doi.org/10.3897/phytokeys.119.29555
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