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Taxonomic revision and palaeoecological interpretation of the plant assemblage of Bernissart (Barremian, Belgium)
Cretaceous Research ( IF 2.1 ) Pub Date : 2021-03-08 , DOI: 10.1016/j.cretres.2021.104814
Candela Blanco-Moreno , Cyrille Prestianni

The Lower Cretaceous plant assemblage of Bernissart (Mons Basin, Belgium) was studied in detail during the 1900s, but no recent revisions have been performed. The taxonomy of plant taxa recovered from this site is updated, which includes one undetermined “aquatic plant” taxon, nine fern taxa (Cladophlebis sp., Hausmannia dichotoma, Phlebopteris dunkeri, Matoniaceae indet., Ruffordia goeppertii, Onychiopsis psilotoides, Coniopteris sp., Korallipteris sp., and Weichselia reticulata), aff. genus Taeniopteris (of unknown affinity), and five undetermined conifer organs (one stem, two types of seed, one cone, and a dispersed bract). Two lithologies are identified, both consisting of grey clays, one with a smooth surface while the other is more irregular. The large number of available specimens has permitted the study of the species richness and relative abundance of the locality and both lithologies. The taphonomical analysis of the specimens including the preservation of the remains, fragment size, and associations between taxa, together with the diversity analyses, results in four assemblages: “algae” in the water column of the lake; a vegetation composed of Weichselia and Phlebopteris closest to the lake margin; Hausmannia, Onychiopsis and the other ferns further away from the margin; and Matoniaceae indet., conifers and aff. Taeniopteris even further away from the depositional site. In general, the plant assemblage at Bernissart consists of open vegetation, which probably belonged to an early successional stage that was burnt frequently by wildfires.



中文翻译:

Bernissart植物组合的分类学修订和古生态解释(比利时巴雷米安)

在1900年代对Bernissart(比利时蒙斯盆地)的下白垩统植物组合进行了详细研究,但尚未进行过任何修订。从此站点恢复的植物分类单元的分类法已更新,其中包括一个未定的“水生植物”分类单元,九个蕨类分类单元(oph属,Hausmannia dichotomaPhlebopteris dunkeri,Matoniaceae ind。,Ruffordia goeppertiiOnychiopsis psilotoidesConiopterisConiopterisConiopteris,ConiopterisConiopterisKorallipteris sp。和Weichselia reticulata),同上。eni(亲和力未知)和五个不确定的针叶树器官(一个茎,两种种子,一个圆锥体和一个片)。确定了两种岩性,均由灰色粘土组成,一种具有光滑的表面,而另一种则更不规则。大量可用的标本已使人们能够研究物种丰富性以及当地和两种岩性的相对丰度。对标本的染色体分析包括残骸的保存,碎片大小和分类群之间的联系,以及多样性分析,形成了四个组合:湖中水柱中的“藻类”;水体中的“藻类”。一组成的植被WeichseliaPhlebopteris最靠近湖边缘; HausmanniaOnychiopsis其他蕨类植物远离边缘;和Matoniaceae indet。,针叶树和aff。eni翅目离沉积点更远。通常,贝尔尼萨尔(Bernissart)的植物群由开放的植被组成,这些植被可能属于早期演替阶段,经常被野火燃烧。

更新日期:2021-04-21
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