Angiosperm floral structures from the Early Cretaceous of Portugal
作者： Else Marie Friis , Kaj Raunsgaard Pedersen , Peter R. Crane
DOI: 10.1007/978-3-7091-6910-0_3
关键词: Stamen 、 Eudicots 、 Laurales 、 Paleontology 、 Stage (stratigraphy) 、 Chloranthaceae 、 Perianth 、 Cretaceous 、 Biology 、 Taxon 、 Botany
摘要: Rich fossil floras including structurally preserved flowers, fruits, seeds and dispersed stamens have recently been extracted from mid-Early Cretaceous sediments Portugal. The material illustrates considerable morphological variability in number arrangement of floral parts, with the most diversity among magnoliid taxa; relatively few eudicots identified. Generally flowers are small undifferentiated perianth massive androecium, include both bisexual unisexual forms. unexpected result this study Early Portugal is presence several epigynous forms at early stage angiosperm evolution.
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