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| Registros recuperados: 11 | |
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| Payne, Jonathan L.; Groves, John R.; Jost, Adam B.; Thienan Nguyen,; Moffitt, Sarah E.; Hill, Tessa M.; Skotheim, Jan M.. |
| Atmospheric hyperoxia, with pO2 in excess of 30%, has long been hypothesized to account for late Paleozoic (360250 million years ago) gigantism in numerous higher taxa. However, this hypothesis has not been evaluated statistically because comprehensive size data have not been compiled previously at sufficient temporal resolution to permit quantitative analysis. In this study, we test the hyperoxia-gigantism hypothesis by examining the fossil record of fusulinoidean foraminifers, a dramatic example of protistan gigantism with some individuals exceeding 10 cm in length and exceeding their relatives by six orders of magnitude in biovolume. We assembled and examined comprehensive regional and global, species-level datasets containing 270 and 1823 species,... |
| Tipo: Text |
Palavras-chave: Body size; Carboniferous; Cope's Rule; Foraminifera; Oxygen; Permian. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00265/37626/35865.pdf |
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| Winkler Prins, C.P.. |
| The study of neospiriferine and spiriferidine brachiopods from the Permian of Timor (Indonesia) present in the collections of the Nationaal Natuurhistorisch Museum (National Museum of Natural History, Leiden, The Netherlands) resulted in a revision of the species Spirifer timorensis Martin, 1881 and Crassispirifer broilii Waterhouse, 2004 and the description of a new species, Latispirifer archboldorum sp. nov. Also, a new genus, Archboldiella, is created, based on the aberrant species Spirifer basleoensis Hayasaka & Hosono, 1951. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Spiriferida; Permian; Timor; Indonesia; 42.72; 38.22. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/499034 |
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| Waveren, I.M. van; Iskandar, E.A.P.; Booi, M.; Konijnenburg-van Cittert, J.H.A. van. |
| A preliminary taxonomic revision of the Early Permian Jambi flora results in a lower number of taxa, a number of new determinations and several new combinations (Dicranophyllum molle (Jongmans & Gothan) comb. nov., Oligocarpia posthumii (Jongmans & Gothan) nov. comb., Callipteridium strictinervis (Jongmans & Gothan) comb. nov.). Cones containing the bicuspidate seeds Tobleria bicuspis are recorded for the first time. The exact stratigraphic position of the Jambi flora is unknown, but brachiopods and fusulinids indicate an Early Permian age. Comparisons with the East Asian Permian floras of the Cathaysian realm indicate that the Jambi palaeoflora can best be compared to a relatively xeric Cathaysian flora, possibly indicative of relatively high... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Plants; Permian; Indonesia; Palaeogeography; 38.21. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/314193 |
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| Iannuzzi,Roberto; Vieira,Carlos E. L.; Guerra-Sommer,Margot; Díaz-Martínez,Enrique; Grader,George W.. |
| Fossil plants belonging to the morphogenera Glossopteris, Pecopteris and Asterotheca were collected from the upper part of the Chutani Formation (Titicaca Group), near the town of San Pablo de Tiquina, on the southeastern shore of Lake Titicaca (northern Altiplano, Bolivia). This paper presents the first description of specimens of the morphogenus Glossopteris from Bolivia. The Bolivian specimens of Glossopteris consist of poorly-preserved impressions, although they present the diagnostic features of this morphogenus. They are fragments of leaves with secondary veins of taeniopterid-type, typical of glossopterids from Late Permian deposits of Gondwana. The only species of Pecopteris confirmed in the first part of this study, i.e. P. dolianitii Rösler and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altiplano of Bolivia; Permian; Glossopteris; Phytogeography. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100011 |
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| Vieira,Carlos E. L.; Iannuzzi,Roberto; Guerra-Sommer,Margot; Díaz-Matrínez,Enrique; Grader,George W.. |
| Fossil plants belonging to the morphogenera Glossopteris, Pecopteris and Asterotheca were collected from the upper part of the Chutani Formation (Titicaca Group), near the town of San Pablo de Tiquina, on the southeastern shore of Lake Titicaca (northern Altiplano, Bolivia). Here we report the analysis of fern-type foliage found at this location. Three species of pecopterid fronds are identified: Pecopteris dolianitii Rohn and Rösler, P. cf. P. cadeadensis Rohn and Rösler, and P. cf. P. pedrasica Read. All these species are typically found in Permian deposits of the Paraná Basin in southern Brazil. Despite the poor preservation of the material, a fertile specimen could be studied and was determined as Asterotheca sp. The paleoenvironmental and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altiplano of Bolivia; Permian; Pecopteris; Asterotheca. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100010 |
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| PAULIV,VICTOR E.; DIAS,ELISEU V.; SEDOR,FERNANDO A.; RIBEIRO,ANA MARIA. |
| The Brazilian records on Xenacanthiformes include teeth and cephalic spines from the Parnaíba, Amazonas and Paraná basins. This work describes a new species of Xenacanthidae, collected in an outcrop of Serrinha Member of Rio do Rasto Formation (Wordian to Wuchiapingian), Paraná Basin, municipality of Jacarezinho, State of Paraná. The teeth of the new species are two or three-cuspidated and the aboral surface show a smooth concavity and one rounded basal tubercle. The coronal surface presents one semi-spherical and subcircular coronal button, and also two lateral main cusps and one central (when present) with less than one fifth of the size of the lateral cusps in the labial portion. The lateral cusps are asymmetric or symmetric, rounded in transversal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Permian; Xenacanthimorpha; Xenacanthidae; Xenacanthus; Shark teeth. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100135 |
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| RICARDI-BRANCO,FRESIA; ARAI,MITSURU; RÖSLER,OSCAR. |
| This paper presents the results of a detailed study of megaspores occurring in coal seams of the Triunfo Member, Rio Bonito Formation at Figueira, Paraná State, Brazil. This coal-bearing sequence accumulated in a marine delta system during the Early Permian. Four species are described and illustrated: Lagenoisporites triunfensis, L. scutiformis, Sublagenicula cf. brasiliensis, and Setosisporites cf. furcatus. Of these, the two species of Lagenoisporites are predominant. Relationships to other megaspore species are discussed; and the temporal and spatial distributions of the four species in the Paraná Basin are documented. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Megaspores; Permian; Rio Bonito Formation; Paraná Basin. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300011 |
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| Registros recuperados: 11 | |
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