Sommerxylon spiralosus from Upper Triassic in southernmost Paraná Basin (Brazil): a new taxon with taxacean affinity
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Academia Brasileira de Ciências
2004
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| _version_ | 1876437480445575168 |
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| author | Etiene F. Pires |
| author_facet | Etiene F. Pires |
| contents | Sommerxylon spiralosus from Upper Triassic in southernmost Paraná Basin (Brazil): a new taxon with taxacean affinity Etiene F. Pires Margot Guerra-Sommer Multidisciplinaria (Ciencias Naturales y Exactas) fossil wood Paraná Basin Upper Triassic taxacean affinity The anatoical description of silici?ed Gymnospermae woods from Upper Triassic sequences of southernmost Paraná Basin (Brazil) has allowed the identi?cation of a new taxon: Sommerxylon spiralosus n.gen. et n.sp. Diagnostic parameters, such as heterocellular medulla composed of parenchymatous and sclerenchymatous cells, primary xylem endarch, secondary xylem with dominant uniseriate bordered pits, spiral thickenings in the radial walls of tracheids, medullar rays homocellular, absence of resiniferous canals and axial parenchyma, indicate its relationship with the family Taxaceae, reporting on the first recognition of this group in the Triassic on Southern Pangea. This evidence supports the hypothesis that the Taxaceae at the Mesozoic were not con?ned to the Northern Hemisphere. 2004 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32776313 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.3 Vol.76 |
| format | Artículo científico |
| id | redalyc_32776313 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Sommerxylon spiralosus from Upper Triassic in southernmost Paraná Basin (Brazil): a new taxon with taxacean affinity Etiene F. Pires Multidisciplinaria (Ciencias Naturales y Exactas) fossil wood Paraná Basin Upper Triassic taxacean affinity Sommerxylon spiralosus from Upper Triassic in southernmost Paraná Basin (Brazil): a new taxon with taxacean affinity Etiene F. Pires Margot Guerra-Sommer Multidisciplinaria (Ciencias Naturales y Exactas) fossil wood Paraná Basin Upper Triassic taxacean affinity The anatoical description of silici?ed Gymnospermae woods from Upper Triassic sequences of southernmost Paraná Basin (Brazil) has allowed the identi?cation of a new taxon: Sommerxylon spiralosus n.gen. et n.sp. Diagnostic parameters, such as heterocellular medulla composed of parenchymatous and sclerenchymatous cells, primary xylem endarch, secondary xylem with dominant uniseriate bordered pits, spiral thickenings in the radial walls of tracheids, medullar rays homocellular, absence of resiniferous canals and axial parenchyma, indicate its relationship with the family Taxaceae, reporting on the first recognition of this group in the Triassic on Southern Pangea. This evidence supports the hypothesis that the Taxaceae at the Mesozoic were not con?ned to the Northern Hemisphere. 2004 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32776313 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.3 Vol.76 |
| title | Sommerxylon spiralosus from Upper Triassic in southernmost Paraná Basin (Brazil): a new taxon with taxacean affinity |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) fossil wood Paraná Basin Upper Triassic taxacean affinity |
| url | https://www.redalyc.org/articulo.oa?id=32776313 |