Notice Sur Le<i>Psaronius Brasiltensis</i>

Brongniart, Adolphe

doi:10.1080/00378941.1872.10827570

Cited by 36 publications

(6 citation statements)

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“…The stratigraphic unit identified outside the crater is the Pedra de Fogo Formation, in agreement with McHone (). Here, this unit is characterized based on lithological and paleontological data in the form of abundant fragments of silicified wood related to the genus Psaronius (Brongniart ; Maziviero ). The Pedra de Fogo Formation was divided into three informal stratigraphic subunits.…”

Section: Discussionmentioning

confidence: 99%

Geology and impact features of Riachão structure, northern Brazil

Maziviero

Vasconcelos

Crósta

et al. 2013

Meteorit & Planetary Scien

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Abstract-Riachão, located at S7°42′/W46°38′ in Maranhão State, northeastern Brazil, is a complex impact structure of about 4.1 km diameter, formed in Pennsylvanian to Permian sedimentary rocks of the Parna ıba Basin sequence. Although its impact origin was already proposed in the 1970s, information on its geology and shock features is still scarce in the literature. We present here the main geomorphological and geological characteristics of the Riachão impact structure obtained by integrated geophysical and remote sensing analysis, as well as geological field work and petrographic analysis. The identified lithostratigraphic units consist of different levels of the Pedra de Fogo Formation and, possibly, the Piau ı Formation. Our petrographic analysis confirms the presence of shock-diagnostic planar microdeformation structures in quartz grains of sandstone from the central uplift as evidence for an impact origin of the Riachão structure. The absence of crater-filling impact breccias and melt rocks, shatter cones, as well as the restricted occurrence of microscopic shock effects, suggests that intense and relatively deep erosion has occurred since crater formation.

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Section: Discussionmentioning

confidence: 99%

Geology and impact features of Riachão structure, northern Brazil

Maziviero

Vasconcelos

Crósta

et al. 2013

Meteorit & Planetary Scien

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“…Although the stem and root mantle of P. brasiliensis have been previously described (Brongniart, 1872) and figured by Zeiller (1840) fig. 56P 4 ), and the adaxial portion "swings" inward with the point of fusion to the peripheral cauline bundle as the "hinge" (fig.…”

Section: Discussion Of P Brasiliensismentioning

confidence: 99%

“…Specimens in the latter category include P. junceus Herzer (1900), P. borealis Macbride ( 1904-6 ) , and P. illinoensis Hoskins ( 1928 (Pelourde, 1912 Pelourde (1912) suggested that the more complete fragment described by Brongniart in 1872 should be considered the type specimen. The better preserved specimen was not figured with Brongniart's (1872) Arnold, 1947 ) although never validly published as such. The name has been changed to P. pertusus to avoid confusion, since the lysigenous cavities of P. blicklei can more readily be termed lacunae than the large intercellular spaces of the ground parenchyma of P. pertusus.…”

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confidence: 99%

The Morphology and Anatomy of American Species of the Genus Psaronius.

Delevoryas¹,

Morgan²

1960

Bulletin of the Torrey Botanical Club

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“…Petrified plants from the Permian of Brazil have been mentioned in the literature for almost one and a half centuries (Brongniart, 1872). However, only the most common psaroniaceous tree ferns, such as the nearly cosmopolitan Psaronius or the Southern Hemisphere Tietea have been studied in detail (Solms-Laubach, 1913;Herbst, 1985Herbst, , 1992Herbst, , 1999.…”

Section: Introductionmentioning

confidence: 99%

New petrified calamitaleans from the Permian of the Parnaíba Basin, central-north Brazil, part II, and phytogeographic implications for late Paleozoic floras

Neregato

Rößler

Iannuzzi

et al. 2017

Review of Palaeobotany and Palynology

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Continuing palaeofloristic studies in the Northern Tocantins Fossil Forest, we describe two new calamitalean species from the Permian of the Parnaíba Basin (central-north Brazil). The fossils comprise axes of various sizes, preserved anatomically as siliceous petrifactions, and found in highly mature sandy fluvial deposits of the Motuca Formation. Based on anatomical and morphological characteristics, Arthropitys tocantinensis sp. nov. and Arthropitys barthelii sp. nov. are described. They share a small central pith cavity (extremely reduced in the latter), scalariform tracheid pitting, and prominent pitting of the ray parenchyma. However, they differ markedly in their branching system: the former having 3-12 branches per node either with or lacking secondary growth, the latter showing 2-17 branches without any secondary growth. However, in A. tocantinensis sp. nov., the presence of large woody branches supports a more complex architecture with at least three successive orders of branches. The extensive secondary tissue in both species is homogeneous; clear segmentation is only visible in the proximal wood of A. tocantinensis sp. nov., but completely absent in A. barthelii sp. nov. The growth architecture of these upright growing, self-supporting trunks are reconstructed based on sizable transverse and longitudinal preparations. Our results confirm that thick woody calamitaleans were elements of disturbed riparian vegetation and much more diverse in terms of anatomy and branching patterns than previously thought. They were well adapted to seasonally dry conditions and formed major plant constituents of Permian low-latitude Southern Hemisphere communities. Additionally, we report the first evidence of colonisation on arborescent calamitaleans by herbaceous sphenophyte axes from the Permian. One of the Arthropitys stems hosts at least 30 Sphenophyllum shoots of various ontogenetic stages, growing inside the destroyed pith, which was previously excavated by arthropod boring. Based on the distribution of key genera within late Paleozoic floras of Euramerica, Gondwana and Cathaysia floral realms cluster analysis and Jaccard Coefficient highlight the distribution of a "Mid-North Brazilian" phytogeographic Region during the early Permian.

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Notice Sur LePsaronius Brasiltensis

Cited by 36 publications

References 0 publications

Geology and impact features of Riachão structure, northern Brazil

Geology and impact features of Riachão structure, northern Brazil

The Morphology and Anatomy of American Species of the Genus Psaronius.

New petrified calamitaleans from the Permian of the Parnaíba Basin, central-north Brazil, part II, and phytogeographic implications for late Paleozoic floras

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