葡萄牙Catefica早白垩世中化石区系:被子植物

Q3 Earth and Planetary Sciences

Fossil Imprint Pub Date : 2022-01-01 DOI:10.37520/fi.2022.016

E. M. Friis, P. Crane, K. Pedersen, M. Mendes, J. Kvaček

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引用次数: 1

摘要

在葡萄牙Catefica村附近发现的下白垩纪Almargem组的被子植物中化石被认为是aptian -早期Albian时代的。Catefica的中化石组合是多样的，除了这里描述的被子植物外，还包含丰富的非被子植物化石组合，包括苔藓植物和石松类的叶轴，石松类和大孢子，以及蕨类植物的孢子囊、sori和叶碎片。还有几种针叶树的小枝、球果、球果鳞片、种子和孢子囊。其他种子植物包括11种与BEG类群(bennettiales - erdtmanicales - gnetales)相关的衣胚种子和营养轴。从已鉴定的植物片段数量来看，被子植物在Catefica组合中最为丰富，占所有标本的一半以上。被子植物在物种数量上也占主导地位，但由于非被子植物化石尚未得到详细的研究，因此植物区系的物种总数尚未确定。被子植物共有67种。被子植物的多样性主要在非菊科水平，包括ana级被子植物、绿兰科和木兰科。无论是在标本的数量上，还是在已知物种的数量上，绿衣被子植物的遗迹都特别普遍。约40%的标本和超过25%的物种是绿桫椤。木兰属被子植物(Magnoliales, Laurales, Canellales, Piperales)的遗迹在被子植物中也很突出。单株被子植物是从属的:只有3 - 4%的被子植物标本可以确定地归属于单株被子植物。建立被子植物5个新属、6个新种(Canrightia foveolata sp. 11、Elasmostemon paisii gen. et sp. 11、enressistemon cateficensis gen. et sp. 11、Ibericarpus cuneiformis gen. et sp. 11、Proencistemon portugallicus gen. 11、Valvidistemon globiferus gen. 11)。还描述了其他几个新分类群，但没有正式命名。

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The Early Cretaceous mesofossil flora of Catefica, Portugal: angiosperms

Angiosperm mesofossils are described from the Lower Cretaceous Almargem Formation exposed near the village of Catefica, Portugal, and are thought to be of Aptian-early Albian age. The mesofossil assemblage from Catefica is diverse and, in addition to the angiosperms described here, also contains a rich assemblage of non-angiosperm fossils, including leafy axes of bryophytes and lycopsids, lycopsid and salvinialean megaspores, and sporangia, sori and leaf fragments of ferns. There are also twigs, cones, cone scales, seeds and sporangia of several kinds of conifers. Other seed plants include 11 species of chlamydospermous seeds and vegetative axes related to the BEG group (Bennettiales-Erdtmanithecales-Gnetales). In terms of the number of plant fragments identified, angiosperms are most abundant in the Catefica assemblage and account for more than half of all specimens. Angiosperms also dominate in number of species, but because the non-angiosperm fossils have not been studied in detail the total number of species in the flora is not yet established. Sixty-seven species of angiosperms are recognized. Angiosperm diversity is mainly at the level of non-eudicots, including ANA-grade angiosperms, Chloranthaceae and magnoliids. Remains of chloranthoid angiosperms are especially common, both in the number of specimens and in number of species recognized. About 40 % of the specimens, and more than 25 % of the species are chloranthoids. Remains of magnoliid angiosperms (Magnoliales, Laurales, Canellales, Piperales) are also prominent among the angiosperms. Eudicots are subordinate: only 3–4 % of all angiosperm specimens can be assigned confidently to eudicot angiosperms. Five new genera and six new species of angiosperms are established (Canrightia foveolata sp. nov., Elasmostemon paisii gen. et sp. nov., Endressistemon cateficensis gen. et sp. nov., Ibericarpus cuneiformis gen. et sp. nov., Proencistemon portugallicus gen. et sp. nov., Valvidistemon globiferus gen. et sp. nov.). Several other new taxa are also described, but not formally named.

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来源期刊

Fossil Imprint Earth and Planetary Sciences-Stratigraphy

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： Fossil Imprint (formerly Acta Musei Nationalis Pragae, Series B – Historia Naturalis) is an international, open access journal, publishing original papers and reviews of any length from all areas of paleontology and related disciplines, such as palaeoanthropology, biostratigraphy, palynology, and archaeobotany/zoology. All taxonomic groups are treated, including plants, invertebrates, vertebrates, microfossils, and ichnofossils, with a special emphasis on terrestrial and post-Palaeozoic marine biota. We encourage the publication of international meetings as well as special thematic issues. The aim of the journal is to spread the scientific knowledge with no restrictions, and to allow access to it to any interested person. Each article includes information about the date of receiving, accepting and issue.