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Early Cretaceous brachiopods from a hydrothermally influenced environment of the Mecsek Mountains (Zengővárkony, southern Hungary) and their palaeobiogeographical relationships
Cretaceous Research ( IF 2.1 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.cretres.2020.104497
Attila Vörös , László Bujtor

Abstract New material and the investigation of old collections provided some 150 specimens of Early Cretaceous brachiopods from the Mecsek Mountains, Hungary. Taxonomic evaluation resulted in the identification of some species previously unknown from Hungary and confirmed the presence of some previously described species, too. In this paper Fortunella cf. fortunae Calzada, 1985, Lacunosella hoheneggeri (Suess, 1858), Monticlarella remesi Nekvasilova, 1977, Moutonithyris moutoniana (d’Orbigny, 1847), Karadagella ? aff. bilimeki (Suess, 1858), Nucleata veronica Nekvasilova, 1980 are described. This fauna is rather endemic. All the specimens reveal a unique phenomenon: they exhibit 25–70% larger average dimensions compared to populations of their closest relatives or type localities. The uniform size increase of these brachiopods may be linked to hydrothermal processes of the sea-floor. Lately, a discovery from the Tyrrhenian Sea offers a Recent, present day analogue to this enigmatic palaeoenvironment. Palaeobiogeographic comparison of this small endemic fauna with eight others, mainly Hauterivian and Tethyan brachiopod assemblages reveals the distinct Sub-Tethyan domain consisting of the faunas from Zengővarkony, Codlea (Eastern Carpathians) and Stramberk (Czechia). This strengthens previously described affinities and relationships of these faunas and helps to clarify the Cretaceous palaeogeographic position of the Mecsek Mountains.

中文翻译:

来自 Mecsek 山脉(匈牙利南部 Zengővárkony)受热液影响环境的早白垩世腕足类动物及其古生物地理关系

摘要 新材料和对旧藏品的调查提供了大约 150 个来自匈牙利梅切克山脉的早白垩世腕足动物标本。分类评估导致鉴定了一些以前在匈牙利未知的物种,并确认了一些先前描述的物种的存在。在本文中,Fortunella 参见。幸运 Calzada, 1985, Lacunosella hoheneggeri (Suess, 1858), Monticlarella remesi Nekvasilova, 1977, Moutonithyris moutoniana (d'Orbigny, 1847), Karadagella ? 阿夫。bilimeki (Suess, 1858), Nucleata veronica Nekvasilova, 1980 进行了描述。这个动物群是相当地方性的。所有标本都揭示了一个独特的现象:与它们最近的亲属或类型地点的种群相比,它们的平均尺寸大 25-70%。这些腕足动物的均匀尺寸增加可能与海底的热液过程有关。最近,第勒尼安海的一项发现为这个神秘的古环境提供了一个最近的、现代的类似物。这种小型特有动物群与其他八种动物群(主要是 Hauterivian 和 Tethyan 腕足动物组合)的古生物地理比较揭示了独特的亚特提斯地区,包括来自 Zengővarkony、Codlea(东喀尔巴阡山脉)和 Stramberk(捷克)的动物群。这加强了先前描述的这些动物群的相似性和关系,并有助于澄清 Mecsek 山脉的白垩纪古地理位置。这种小型特有动物群与其他八种动物群(主要是 Hauterivian 和 Tethyan 腕足动物组合)的古生物地理比较揭示了独特的亚特提斯地区,包括来自 Zengővarkony、Codlea(东喀尔巴阡山脉)和 Stramberk(捷克)的动物群。这加强了先前描述的这些动物群的相似性和关系,并有助于澄清 Mecsek 山脉的白垩纪古地理位置。这种小型特有动物群与其他八种动物群(主要是 Hauterivian 和 Tethyan 腕足动物组合)的古生物地理比较揭示了独特的亚特提斯地区,包括来自 Zengővarkony、Codlea(东喀尔巴阡山脉)和 Stramberk(捷克)的动物群。这加强了先前描述的这些动物群的相似性和关系,并有助于澄清 Mecsek 山脉的白垩纪古地理位置。
更新日期:2020-10-01
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