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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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| Donovan, S.K.. |
| A distinctive chert erratic pebble found on the beach at Overstrand, north Norfolk, eastern England, is a Derbyshire screwstone. Such cherts are typical of the Mississippian (Lower Carboniferous) limestones of the southern Pennines (White Peak), over 200 km to the northwest. It was most probably transported by fluvial or glacial action during the Pleistocene and was recently disinterred by coastal erosion. The most diagnostic feature of screwstone cherts are the included mouldic crinoid ossicles, particularly columnals. Columnals of the monobathrid camerate crinoid Megistocrinus? globosus? (Phillips) are described from this screwstone; these have a circular outline, central pentagonal lumen and a raised perilumen. The uncertainty of the identification is... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Beachcombing; Provenance; Neogene; Carboniferous; Megistocrinus; 38.10. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/361971 |
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| Sánchez de Posada, L.C.; Sanz-López, J.. |
| A new ostracod found in the Mississippian of the Cantabrian Mountains shows ornamental features similar to Criboconcha Cooper, hitherto known from Mississippian and Pennsylvanian strata of different parts of the world (especially from the U.S.A.). However, some features of this ostracod are very different from the typical characteristcs of the Healdiidae and support bairdiocyproidean affinities. The new genus Pseudocriboconcha (type species Pseudocriboconcha prinsi sp. nov.) is proposed. This species is distinguishedby distinct pits on the lateral surface; a posterior ridge ending in dorsal and ventral spines; a rounded rim parallel to the borders of each valve; and a spine on this rim, above the anterior end and directed dorsally or anterodorsally. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ostracods; Pseudocriboconcha prinsi; Carboniferous; Spain; 38.22. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/361969 |
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| Nemyrovska, T.I.; Samankassou, E.. |
| The present study reports upon the conodont faunas of the uppermost lower Viséan (Carrión unit) through the lower Serpukhovian (Peña unit) deep water Triollo section, Cantabrian Mountains, Palencia, Spain. The condensed succession of grey, laminate, nodular and cherty limestones with marl intercalations contains abundant and diverse conodont faunas. Three new species of Vogelgnathus, V. cantabricus, V. palentinus and V. triolloensis, as well as one new species and one new subspecies of Gnathodus, Gn. boogaardi and Gnathodus girtyi pyrenaeus Nemyrovska & Perret subsp. nov., are described. All stratigraphically important taxa for the studied interval are described. Four conodont zones are distinguished, three in the Viséan, Gnathodus praebilineatus, Gn.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Conodonts; Carboniferous; Viséan; Cantabrian Mountains; Biostratigraphy; Palaeoecology; 42.80. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/210101 |
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| Wagner, R.H.; Álvarez-Vázquez, C.. |
| An analysis of Alethopteris virginiana Fontaine & White from the lower Dunkard in the Appalachians of North America shows that three different taxa are likely to be represented in the initial illustration. The specific epithet ‘virginiana’ ought to be restricted to a form comparable to Callipteridium costei (Zeiller) Wagner, whereas the two other taxa are referred to pecopterid ferns. A neotype is proposed for Callipteridium virginianum (Fontaine & White) comb. nov. on the basis of topotypes. Zeiller’s illustration of ‘Alethopteris’ costei is reproduced for comparison. On the other hand, a full description and illustration are provided for Alethopteris leonensis Wagner, a species which had been identified previously with Alethopteris virginiana,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Alethopteris; Callipteridium; Pteridosperm; Stephanian; Carboniferous; 38.22. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/361974 |
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| Lewis, D.N.; Donovan, S.K.. |
| Collections in museums usually have boxes of specimens which remain ‘undiscovered’ and yet which may be of importance or interest. The recent rediscovery of specimens of Archaeocidaris in the Nationaal Natuurhistorisch Museum, Leiden, from the Carboniferous of Egypt illustrates this point. These specimens were collected in 1938 by Dr. H.M.E. Schürmann (1891-1979), who had been a student of Professor J. Wanner (1878-1956), the noted expert on fossil echinoderms. The Egyptian Archaeocidaris plates include interambulacrals and radioles. These are closest to Archaeocidaris rossica (von Buch) from the Moscow area of Russia, although there are sufficient differences in radiole morphology to suggest that they are not necessarily conspecific. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Systematics; Echinoids; Archaeocidaris; Carboniferous; Egypts; 42.72. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/210114 |
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| Winkler Prins, C.P.. |
| After a short introduction on the reef development during the Late Palaeozoic, the tectono-stratigraphic history of the Cantabrian Mountains (northern Spain) during the Carboniferous is discussed, with an emphasis on the tectonically active Pennsylvanian (i.e., Late Carboniferous). The reef-bearing Valdeteja, San Emiliano, and Cuera formations are briefly described, and their brachiopod faunas are discussed with special emphasis on adaptations to a reef environment. The brachiopod faunas are compared with similar faunas from carbonate-platform deposits with reef structures of Mississippian (i.e., Early Carboniferous) age from Northwest Europe (the British Isles in particular), with Pennsylvanian-Permian faunas from the Alps, Urals, Spitsbergen and Arctic... |
| Tipo: Part of book or chapter of book |
Palavras-chave: Brachiopoda; Reef; Spain; Carboniferous; 42.72; 38.22. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/499290 |
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| Palynological analysis of the Malanzán Formation in the Paganzo Basin, northwestern Argentina, has yielded six well-preserved palynological assemblages. Fifty-nine species were determined: 37 spores, 19 pollen grains, and 3 algae. Thirty-two of these species have not been recorded so far from the Malanzán Formation, and all pollen species are illustrated for the first time. These assemblages are referred to Sub-Biozone A of the Raistrickia densa-Convolutispora muriornata Biozone, Serpukhovian in age. Moreover, the abundance of monosaccate pollen grains might constrain the Malanzán Formation to the late Serpukhovian. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argentina; Malanzán Formation; Carboniferous; Palynology. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142009000300005 |
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| Registros recuperados: 11 | |
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