New petrified calamitaleans from the Permian of the Parnaíba Basin, central-north Brazil, part III, with some concerns regarding anatomical features of Paleozoic petrified sphenophytes
| Autor: | Ronny Rößler, Rodrigo Neregato, Robert Noll, Rosemarie Rohn |
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| Přispěvatelé: | Universidade Estadual Paulista (UNESP), Museum für Naturkunde, Geological Institute, In den Birkengärten 30 |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2022-04-28T19:42:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-10-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Deutsche Forschungsgemeinschaft A new petrified calamitalean is described from the Permian Motuca Formation, Parnaíba Basin, central-north Brazil. In contrast to all other three-dimensionally preserved Brazilian species, it represents a semi-self-supporting woody plant characterized by a distinctive branch system and cellular anatomy. Arthropitys buritiranensis sp. nov. is proposed to accommodate the new material. The branch architecture is composed of at least three types of branches: (i) principal woody side branches, (ii) up to three secondary woody branches per node, scattered along the stem or the principal side branches, and (iii) 8–11 leafy twigs per whorl, at every third, rarely the second node, without secondary growth. The wood is segmented into fascicular wedges and interfascicular rays, clearly visible only within the inner wood of the stem and woody branches. The tracheid walls of the secondary xylem have exclusively scalariform pits. Ray parenchyma cells have pitted horizontal walls. The new calamitalean was part of the riparian vegetation of tree ferns, calamitaleans and gymnosperms recorded in a distal fluvial plain setting. The wood shows irregular growth interruptions and, therefore, points to a seasonally dry climate that shaped even low latitude paleofloras of tropical Pangaea. UNESP - Rio Claro Institute of Geosciences and Exact Sciences, Department of Geology, Caixa Postal 178 Museum für Naturkunde, Moritzstraße 20 TU Bergakademie Freiberg Geological Institute, Bernhard-von Cotta Straße 2 In den Birkengärten 30 UNESP - Rio Claro Institute of Geosciences and Exact Sciences, Department of Geology, Caixa Postal 178 CNPq: 141365/2008-0 Deutsche Forschungsgemeinschaft: RO 1273/3-1 Deutsche Forschungsgemeinschaft: RO 1273/4-1 |
| Databáze: | OpenAIRE |
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