986 resultados para Iberian inscriptions
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This issue of the Catalan Journal of Linguistics was conceived with the idea to promote comparative studies of the languages spoken in the Iberian Peninsula. The importance of comparison in linguistics dates back to neogrammarians in the xix century due to their interest of discovering the common roots of most of the languages spoken in Europe. In order to get to that objective, comparison of phonological patterns were crucial to retrieve the common Indo-European origins
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Comprend : Version latine abrégée, attribuée à saint Jérôme, d'une cosmographie supposée écrite en grec ; Version latine abrégée... d'une cosmographie supposée écrite en grec...
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Variations in the stable carbon-isotope ratio of marine and continental sediments can reflect changes in sink and flux modifications of the palaeocarbon cycle. Here we report carbon-isotope compositions of Middle Jurassic marine carbonates from the Betic Cordillera (southern Spain), which represents an ideal region to link the stable carbon-isotope curves directly to ammonite zones and subzones, and thereby for the first time achieve an accurate chronostratigraphic calibration. The five sections studied represent basin and high swell deposits of the Southern Iberian palaeomargin. We find a similar delta C-13 of carbonates between different oceanic areas, suggesting a homogeneous carbon-isotope oceanic reservoir through the Middle Jurassic. The Aalenian-Bajocian transition is a critical period in ammonite evolution; hence the Early Jurassic fauna are replaced by new ammonite families which become dominant throughout the Middle and Late Jurassic. For this reason, we compared the delta C-13 values of carbonates with ammonite diversity and extinction rates at different taxonomical levels in order to explore the possible relationship between the carbon cycle and ammonite evolution. The carbon-isotope values of carbonates are not exactly linearly correlated with the extinction rate and ammonite diversity, but the main faunal turnovers follow minimum delta C-13 values, where extinct taxa are replaced by new ones. Likewise, radiation episodes are associated with increasing delta C-13 values and with transgressive sea-level rise. All these data support the idea that perturbations in the global carbon cycle reflect rapid palaeoenvironmental changes. We made detailed analyses of these faunal turnovers, using them as a proxy to identify major palaeoenvironmental crises in their ecosystems forced by modification in the carbon cycle. (c) 2006 Elsevier B.V All rights reserved.
A New Species of Sand Racer, Psammodromus (Squamata: Lacertidae), from the Western Iberian Peninsula
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A new species of lacertid lizard of the genus Psammodromus is described from the Iberian Peninsula. Genetic and recently published phenotypic data support the differentiation of Psammodromus hispanicus into three, and not as previously suggested two, distinct lineages. Age estimates, lineage allopatry, the lack of mitochondrial and nuclear haplotype sharing between lineages, ecological niche divergence, and the current biogeographic distribution, indicated that the three lineages correspond to three independent species. Here, we describe a new species, Psammodromus occidentalis sp. n., which is genetically different from the other sand racers and differentiated by the number of femoral pores, number of throat scales, snout shape, head ratio, green nuptial coloration, and number of supralabial scales below the subocular scale. We also propose to upgrade the two previously recognized subspecies, Psammodromus hispanicus hispanicus Fitzinger, 1826 from central Spain and Psammodromus hispanicus edwardsianus (Dugès, 1829) from eastern Spain, to the species level: Psammodromus hispanicus stat. nov. and Psammodromus edwardsianus stat. nov. Given that the holotype of Psammodromus hispanicus was lost, we designate a neotype. We also analysed museum specimens of P. blanci, P. microdactylus and P. algirus to describe differentiation of the Psammodromus hispanicus lineages/species from their closest relatives.
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