On tile anatomy of Dadoxylon arberi Seward with some remarks on the phylogenetical tendencies of its tracheid pits

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dc.contributor.authorErasmus, T.
dc.date.accessioned2015-01-07T10:39:04Z
dc.date.available2015-01-07T10:39:04Z
dc.date.issued1976
dc.descriptionMain articleen_ZA
dc.description.abstractA well preserved specimen of Dadoxylon arberi Seward has been discovered in the Beaufort Series (Upper Karroo System) of the Empangeni district in Natal, South Africa. The species is characterized by the tracheid pits which are araucaroid in the multiseriate condition, but which are more often circular and separately arranged or appear in stellate groups. The cross field pits tend to be aligned in horizontal pairs. Dadoxylon arberi shows a relationship with several species of the recent Araucariaceae. Its resemblance to other Gondwana woods from other Southern Hemisphere countries suggests a great uniformity in the elements of the coniferous flora of that time. It is suggested that Dadoxylon arberi represents an intermediate form between the Araucariaceae and Podocarpaceae. The reduction in the seriation of the tracheid pits and a drifting thereof seems to stand in close correlation with the formation of annual rings.en_ZA
dc.description.sponsorshipNoneen_ZA
dc.identifier.citationNoneen_ZA
dc.identifier.issn0078-8554
dc.identifier.urihttp://hdl.handle.net/10539/16196
dc.language.isoenen_ZA
dc.publisherBernard Price Institute for Palaeontological Researchen_ZA
dc.relation.ispartofseriesNone;
dc.subjectDadoxylon arberi; tracheid pitsen_ZA
dc.titleOn tile anatomy of Dadoxylon arberi Seward with some remarks on the phylogenetical tendencies of its tracheid pitsen_ZA
dc.typeArticleen_ZA
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Volume 19 1976