A new Hauterivian palynoflora from the Vale Cortiço site (central Portugal), and its palaeoecological implications for western Iberia

Q2 Agricultural and Biological Sciences

Acta Palaeobotanica Pub Date : 2019-12-01 DOI:10.2478/acpa-2019-0010

M. Mendes, France Polette, P. P. Cunha, Pedro A. Dinis, D. Batten

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引用次数: 8

Abstract

Abstract Palynofloral assemblages are an invaluable source of information about the interactions between fossil plants and their environments. Here we describe a new Early Cretaceous palynoflora from the Lusitanian Basin in the Estremadura region of central western Portugal. A palynological assemblage of 28 genera and 40 species was extracted from 14 samples collected in the Vale Cortiço clay pit complex near the small village of Ameal (Torres Vedras Municipality). The source is a dark grey mudstone layer belonging to the lower part of the Santa Susana Formation, which is considered to be of early Hauterivian age. The palynoflora is dominated by fern spores and gymnosperm pollen. Bryophyte and lycophyte palynomorphs are also present but subordinate. Angiosperm pollen and algal or dinoflagellate cysts were not recognised in the studied samples. The palynological assemblage represents mixed conifer forest with the ground cover and understorey vegetation dominated by ferns, with patchy occurrences of bryophytes and lycophytes. A riverine environment with surrounding vegetation of open woodland and ground cover primarily of ferns is strongly indicated for the region.

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来自葡萄牙中部corcorrado遗址的一种新的Hauterivian孢菌群及其对伊比利亚西部的古生态学意义

摘要孢粉组合是有关化石植物与其环境之间相互作用的宝贵信息来源。在这里，我们描述了葡萄牙中西部埃斯特雷马杜拉地区卢西塔尼亚盆地的一个新的早白垩世孢粉植物群。从阿梅尔（Torres Vedras市）小村庄附近的Vale Cortiço粘土坑复合体中采集的14个样本中提取了一个由28属40种组成的孢粉组合。震源为深灰色泥岩层，属于Santa Susana组下部，被认为是早期的豪特里夫阶。孢粉植物群以蕨类孢子和裸子植物花粉为主。苔藓植物和番茄植物的孢子形态也存在，但从属。被子植物花粉和藻类或甲藻囊肿在研究样本中未被识别。坡理学组合代表针叶树混合林，地面覆盖物和下层植被以蕨类植物为主，苔藓植物和番茄植物零星分布。该地区的河流环境，周围植被为开阔林地，地面覆盖物主要为蕨类植物。

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来源期刊

Acta Palaeobotanica Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

20 weeks

期刊介绍： Acta Palaeobotanica is an international journal edited in English by the W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, since 1960, which publishes original palaeobotanical, palynological, palaeoecological and palaeophytogeographical papers, monographs, review and discussion articles and book reviews. It is the only journal in the Central and Eastern Europe publishing papers from all fields of palaeobotany. The journal is published regularly in one volume per year, with two numbers.