Descripción
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Fossil woods of the genus Protocupressinoxylon Eckhold are reported from the Lower Cretaceous (upper Aptian e lower Albian) of Casal do Estortiga, near Santa Catarina da Serra, Lusitanian Basin, western Portugal. The three silicified specimens show up to 7-µm-thick-walled, rounded to polygonal tracheids; homogeneous rays, separated by 2-8 cell rows (in average 3-4); normal or traumatic, diffuse axial parenchyma with abundant cell content; and no resin canal but abundant resin content. The cupressoid conifers dominated the border between the temperate wet tropical belt and the arid mid-latitude belt. The indistinct growth rings suggest no marked seasonality in western Portugal, as it was also suggested in the Iberian Mountain System. Several other climate proxies of the trunk-bearing unit confirm that the wood was deposited under a warm and wet climate. During the Early Cretaceous, the Iberian Peninsula was a connecting bridge between Laurasia and northern Gondwana, acting as a large regional ecotone. Although the Iberian Peninsula was dominated by a Laurasian component, climatic differences between the two regions were driving forces behind biogeographical relationships in the western Tethys. | |
Internacional
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JCR del ISI
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Si |
Título de la revista
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Cretaceous Research |
ISSN
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0195-6671 |
Factor de impacto JCR
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2,39 |
Información de impacto
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Volumen
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51 |
DOI
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10.1016/j.cretres.2014.06.004 |
Número de revista
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Desde la página
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112 |
Hasta la página
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120 |
Mes
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SIN MES |
Ranking
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Paleontology 6/49 |