Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations
Abstract A Brazilian cordaitalean leaf is reassigned and redescribed based on cuticular analysis. The new name Noeggerathiopsis brasiliensis is erected as a replacement for Rufloria gondwanensis Guerra-Sommer. The leaf adpressions come from a tonstein layer within a Sakmarian coal seam of the Faxina...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Geologia
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| Series: | Brazilian Journal of Geology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892019000200310&lng=en&tlng=en |
| _version_ | 1818172387470868480 |
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| author | Isabela Degani-Schmidt Margot Guerra-Sommer |
| author_facet | Isabela Degani-Schmidt Margot Guerra-Sommer |
| author_sort | Isabela Degani-Schmidt |
| collection | DOAJ |
| description | Abstract A Brazilian cordaitalean leaf is reassigned and redescribed based on cuticular analysis. The new name Noeggerathiopsis brasiliensis is erected as a replacement for Rufloria gondwanensis Guerra-Sommer. The leaf adpressions come from a tonstein layer within a Sakmarian coal seam of the Faxinal Coalfield, southern Paraná Basin, Brazil (U-Pb SHRIMP mean age 291 ± 1.3 Ma, Rio Bonito Formation). The leaf micromorphological pattern, observed under optical transmitted light and field emission gun - scanning electron microscopy, is distinct from the Euramerian Cordaites Unger and very similar to the Angaran Rufloria Meyen. The lower epidermis has conspicuous longitudinal stomatiferous furrows typical of Noeggerathiopsis (Feistmantel) McLoughlin & Drinnan covered by tightly interwoven trichomes, epidermal and probably also hypodermal highly cutinized sheaths at the borders of furrows, and haplocheilic stomatal apparati surrounded by long conical trichomes. The xeromorphic cuticle structures are similar to those of Glossopteris pubescens (Guerra-Sommer) Degani-Schmidt & Guerra-Sommer, the dominant leaf species preserved in the tonstein layer, indicating convergent ecological adaptations to abiotic stress factors in distinct plant groups in the peat-forming paleoenvironment. |
| first_indexed | 2024-12-11T19:11:48Z |
| format | Article |
| id | doaj.art-db1b16389a094cc0b6a980f2aac540f7 |
| institution | Directory Open Access Journal |
| issn | 2317-4692 |
| language | English |
| last_indexed | 2024-12-11T19:11:48Z |
| publisher | Sociedade Brasileira de Geologia |
| record_format | Article |
| series | Brazilian Journal of Geology |
| spelling | doaj.art-db1b16389a094cc0b6a980f2aac540f72022-12-22T00:53:46ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-469249210.1590/2317-4889201920190020S2317-48892019000200310Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerationsIsabela Degani-SchmidtMargot Guerra-SommerAbstract A Brazilian cordaitalean leaf is reassigned and redescribed based on cuticular analysis. The new name Noeggerathiopsis brasiliensis is erected as a replacement for Rufloria gondwanensis Guerra-Sommer. The leaf adpressions come from a tonstein layer within a Sakmarian coal seam of the Faxinal Coalfield, southern Paraná Basin, Brazil (U-Pb SHRIMP mean age 291 ± 1.3 Ma, Rio Bonito Formation). The leaf micromorphological pattern, observed under optical transmitted light and field emission gun - scanning electron microscopy, is distinct from the Euramerian Cordaites Unger and very similar to the Angaran Rufloria Meyen. The lower epidermis has conspicuous longitudinal stomatiferous furrows typical of Noeggerathiopsis (Feistmantel) McLoughlin & Drinnan covered by tightly interwoven trichomes, epidermal and probably also hypodermal highly cutinized sheaths at the borders of furrows, and haplocheilic stomatal apparati surrounded by long conical trichomes. The xeromorphic cuticle structures are similar to those of Glossopteris pubescens (Guerra-Sommer) Degani-Schmidt & Guerra-Sommer, the dominant leaf species preserved in the tonstein layer, indicating convergent ecological adaptations to abiotic stress factors in distinct plant groups in the peat-forming paleoenvironment.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892019000200310&lng=en&tlng=enGondwanaCordaitalesCuticular analysisTrichomesPaleozoicFossil plants |
| spellingShingle | Isabela Degani-Schmidt Margot Guerra-Sommer Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations Brazilian Journal of Geology Gondwana Cordaitales Cuticular analysis Trichomes Paleozoic Fossil plants |
| title | Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations |
| title_full | Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations |
| title_fullStr | Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations |
| title_full_unstemmed | Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations |
| title_short | Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations |
| title_sort | epidermal morphology of the cordaitalean leaf noeggerathiopsis brasiliensis nom nov from the southern parana basin lower permian rio bonito formation and paleoenvironmental considerations |
| topic | Gondwana Cordaitales Cuticular analysis Trichomes Paleozoic Fossil plants |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892019000200310&lng=en&tlng=en |
| work_keys_str_mv | AT isabeladeganischmidt epidermalmorphologyofthecordaitaleanleafnoeggerathiopsisbrasiliensisnomnovfromthesouthernparanabasinlowerpermianriobonitoformationandpaleoenvironmentalconsiderations AT margotguerrasommer epidermalmorphologyofthecordaitaleanleafnoeggerathiopsisbrasiliensisnomnovfromthesouthernparanabasinlowerpermianriobonitoformationandpaleoenvironmentalconsiderations |