Heterophylly in Cordaites-like foliage from western Gondwana

Césari, Silvia N.; Hünicken, Mario A.

doi:10.1016/j.revpalbo.2013.04.001

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…High diversity is supported not only by the wide distribution of the plants but also by the enormous range of variability in their growth habits ( fig. 10A, 10B), from scrambling forms (Rothwell and Warner 1984), to small trees (Cridland 1964), to large, woody trees of tall stature (Falcon-Lang and Scott 2000;Falcon-Lang andBashforth 2004, 2005;Š imů nek et al 2009;Césari and Hü nicken 2013). The broad range of habitats encompassed by species of this lineage also suggests and is consistent with high species diversity (Š imů nek 2000,2007,2008); cordaitaleans were found throughout the Pennsylvanian tropical realm and were important in Cathyasian eastern Pangean floras during the Permian (Hilton et al 2009).…”

Section: Wetland Floral Compositionmentioning

confidence: 76%

“…The broad range of habitats encompassed by species of this lineage also suggests and is consistent with high species diversity (Š imů nek 2000,2007,2008); cordaitaleans were found throughout the Pennsylvanian tropical realm and were important in Cathyasian eastern Pangean floras during the Permian (Hilton et al 2009). The group also extended into the high latitudes, particularly in the Permian, and so was of global distribution (Meyen 1987;Césari and Hü nicken 2013).…”

Section: Wetland Floral Compositionmentioning

confidence: 99%

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Wetland-Dryland Vegetational Dynamics in the Pennsylvanian Ice Age Tropics

DiMichele¹

2014

International Journal of Plant Sciences

158

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Premise of research. The Late Paleozoic Ice Age was the last extensive pre-Pleistocene ice age. It includes many climate changes of different intensities, permitting examination of many and varied biotic responses. The tropical Pennsylvanian Subperiod, usually visualized as one vast wetland coal forest, in fact also was dominated, periodically, by seasonally dry vegetation that, in turn, covered most of the central and western Pangean supercontinent. Equatorial wetland and dryland biomes oscillated during single glacial-interglacial cycles. This recognition changes understanding of the Coal Age tropics; examination of their spatiotemporal patterns indicates that these vegetation types responded differently to global environmental disturbances and long-term trends and points to potentially different underlying controls on evolutionary histories of their component lineages.Methodology. This study is based on the published literature and on examination of geological exposures and fossil floras, mainly from North America but also from other parts of the world.Pivotal results. Wetlands and seasonally dry habitats were equally part of the Coal Age Pangean tropics. They dominated these landscapes at different times, under different climatic regimes. Wetland vegetation was likely forced into refugia during seasonally dry (subhumid to semiarid) parts of glacial-interglacial cycles; it reemerged/reassembled during wet (humid to perhumid) periods. Seasonally dry vegetation resided permanently in areas of western and central Pangea and in microhabitats within the Central Pangean Mountains. Both floras had lower biodiversity than modern floras in similar habitats. The wetland flora species pool was more phylogenetically disparate than any modern vegetation. In contrast, seasonally dry floras were dominated by seed plants. These biomes responded differently to acute environmental changes and chronic long-term aridification.Conclusions. From ecological or evolutionary perspectives, the present-day world is but one possibility. Lower-diversity worlds such as the late Paleozoic, with a rich spectrum of environmental variations, offer insights into relationships between organisms and environments that expand understanding of these phenomena and enlarge our sense of what is possible or probable as we look to the future.

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Section: Wetland Floral Compositionmentioning

confidence: 76%

Section: Wetland Floral Compositionmentioning

confidence: 99%

Wetland-Dryland Vegetational Dynamics in the Pennsylvanian Ice Age Tropics

DiMichele¹

2014

International Journal of Plant Sciences

158

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“…The probable presence of northern cordaitalean elements in the Gondwanan floras was supported by the identification of Cordaites bifolius Césari & Hünicken (2013), which shares features with Cordaites (e.g., heterophylly, needle-like leaves, leaf scars similar to Cordaicladus Grand'Eury, fertile organs similar to Cordaitanthus Feistmantel bearing Cordaicarpus-type of seeds). The occurrence of Gondwanan Cordaites was previously reported by Archangelsky & Leguizamón (1980), Archangelsky & Cúneo (1991), Chandra & Srivastava (1991) and Srivastava (1996) based only on leaf gross morphology and venation patterns.…”

Section: Introductionmentioning

confidence: 92%

Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations

Degani-Schmidt

Guerra-Sommer

2019

Braz. J. Geol.

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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.

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“…In order to narrow the comparisons, primary focus was placed on late Paleozoic fl oras, in particular with those that share elements with the paleofl ora of the La Golondrina Formation. Cordaitanthus-type fructifi cations from Gondwana were unknown until recently, when Césari & Hünicken (2013) described fructifi cations associated with Cordaites bifolius, and assigned them to Cordaitanthus sp. 1 and 2.…”

Section: Potential Affi Nitiesmentioning

confidence: 99%

New glossopterid polysperms from the Permian La Golondrina Formation (Santa Cruz Province, Argentina): potential affinities and biostratigraphic implications

Cariglino¹

2015

Rev. bras. paleontol.

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-Impression fossils of ovuliferous fructifi cations from the Permian La Golondrina Formation in Santa Cruz, Argentina, are described, their affi nities compared, and fi nally, assigned to the Arberiaceae (Glossopteridales). Based on morphological differences from the genera in Arberiaceae, a new taxon is established for some specimens, whereas others are allocated to Arberia madagascariensis (Appert) Anderson & Anderson. This is the fi rst record of Arberiaceae from the La Golondrina Basin. The biostratigraphic implications of the occurrence of this family in this unit are discussed, and suggest that more evidence other than that provided by the megafl oral elements is needed to resolve the age of the constituent members of the La Golondrina Formation.

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Heterophylly in Cordaites-like foliage from western Gondwana

Cited by 14 publications

References 30 publications

Wetland-Dryland Vegetational Dynamics in the Pennsylvanian Ice Age Tropics

Wetland-Dryland Vegetational Dynamics in the Pennsylvanian Ice Age Tropics

Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations

New glossopterid polysperms from the Permian La Golondrina Formation (Santa Cruz Province, Argentina): potential affinities and biostratigraphic implications

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