The root systems of permian arborescent sphenopsids: evidence from the northern and southern hemispheres

dc.contributorMuseum Naturkunde
dc.contributorTU Bergakademie Freiberg
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorRoessler, Ronny
dc.creatorMerbitz, Mathias
dc.creatorAnnacker, Volker
dc.creatorLuthardt, Ludwig
dc.creatorNoll, Robert
dc.creatorNeregato, Rodrigo [UNESP]
dc.creatorRohn, Rosemarie [UNESP]
dc.date2014-12-03T13:11:26Z
dc.date2014-12-03T13:11:26Z
dc.date2013-06-01
dc.date.accessioned2023-09-09T10:10:49Z
dc.date.available2023-09-09T10:10:49Z
dc.identifierhttp://www.schweizerbart.de/papers/palb/detail/290/81892/The_root_systems_of_Permian_arborescent_sphenopsids_evidence_from_the_Northern_and_Southern_hemispheres
dc.identifierPalaeontographica Abteilung B-palaophytologie. Stuttgart: e Schweizerbartsche Verlagsbuchhandlung, v. 290, n. 4-6, p. 65-107, 2013.
dc.identifier0375-0299
dc.identifierhttp://hdl.handle.net/11449/113140
dc.identifierWOS:000332595900002
dc.identifier8936275161197131
dc.identifier0000-0001-6110-4194
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8762752
dc.descriptionAnatomically preserved calamitalean trunks are described from the Permian fossil forests of Chemnitz, Germany, and Tocantins, central-north Brazil. Several trunk bases were found in situ, still rooting in their former substrate or in parautochthonous sediments and revealing multiple organic connections between stems and roots. The new evidence of several free-stemmed Permian calamitaleans from different fossil lagerstatten and different taphonomic modes from the Northern and Southern hemispheres has implications for understanding calamite growth and challenges the universal validity of the reconstruction of rhizome-bearing woody trees. Whereas the stems belong to different species of the widely distributed genus Arthropitys GOEPPERT 1864, among them the generitype A. bistriata (COTTA) emend. RoSSLER, FENG & NOLL 2012 the attached roots represent the largest calamite roots ever found and incorporate a broad spectrum of preservational forms and ontogenetic stages. The latter are represented by the root genera Astromyelon WILLIAMSON 1878, Myriophylloides HICK & CASH 1881 and Asthenomyelon LEISTIKOW 1962 that were evidenced for the first time from Chemnitz, the type locality of Arthropitys and Calamitea (COTTA) emend. ROSSLER & NOLL 2007. Branched, stem-borne, adventitious root systems exhibit similar architectures, arise from different nodes of the lowermost trunks and anchor the trees in' different substrates. Developmental features were analysed in first- to third-order roots, which possess clearly-defined concentric tissue zones: epidermis/periderm, cortex, endodermis and central vascular tissue with or without pith. First-order roots, in particular, show considerable secondary growth. Numerous zones of concentric density variation in the secondary xylem indicate some kind of seasonality in the early Permian environments.
dc.descriptionVolkswagen Foundation
dc.descriptionMuseum Naturkunde, DAStietz, D-09111 Chemnitz, Germany
dc.descriptionTU Bergakademie Freiberg, Inst Geol, Dept Palaeontol, D-09599 Freiberg, Germany
dc.descriptionUNESP Rio Claro, Inst Geosci & Exact Sci, Dept Appl Geol, BR-13506900 Sao Paulo, Brazil
dc.descriptionUNESP Rio Claro, Inst Geosci & Exact Sci, Dept Appl Geol, BR-13506900 Sao Paulo, Brazil
dc.descriptionVolkswagen Foundation: I/84638
dc.format65-107
dc.languageeng
dc.publisherE Schweizerbart'sche Verlagsbuchhandlung
dc.relationPalaeontographica Abteilung B-palaophytologie
dc.relation0.579
dc.relation0,434
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectfossil forest
dc.subjectcalamitaleans
dc.subjectanatomy
dc.subjectpetrifaction
dc.subjectroots
dc.titleThe root systems of permian arborescent sphenopsids: evidence from the northern and southern hemispheres
dc.typeArtigo


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