Late Sinemurian and Early Pliensbachian Radiolaria from Mount Rettenstein (Northern Calcareous Alps, Austria). Part 2. Entactinaria and Spumellaria

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE Pub Date : 2023-12-01 DOI:10.1016/j.revmic.2023.100752

Tim Cifer, Špela Goričan

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引用次数: 0

Abstract

On Mount Rettenstein (Northern Calcareous Alps, Austria) a 95-m-thick Lower Jurassic succession of grey siliceous limestone and marl allowed us to study well-preserved and diverse radiolarian assemblages. The succession crossing the Sinemurian–Pliensbachian boundary yielded seven productive radiolarian samples, five of which were assigned to the Upper Sinemurian and two to the Lower Pliensbachian. In this article, we present 24 species and nine genera belonging to the order Entactinaria, and 66 species and 27 genera to the order Spumellaria. One genus (Tetractoma Cifer nov. gen.) and six species are described as new: Charlottalum austriacum Cifer nov. sp., Crucella optima Cifer nov. sp., Hexapyramis? sphaericus Cifer nov. sp., Paronaella triangularis Cifer nov. sp., Pseudoheliodiscus rotaformis Cifer nov. sp., and Tetractoma tollmanni Cifer nov. gen. nov. sp. In the Sinemurian, by far the most abundant genus amongst either Spumellaria and Entactinaria is Gorgansium. The Pliensbachian samples are, on the other hand, dominated by the genera Archaeocenosphaera and Praeconocaryomma. Compiled stratigraphic and geographic ranges as well as synonymies, descriptions and remarks are provided.

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来自雷滕斯坦山（奥地利北石灰质阿尔卑斯山）的晚新元古代和早上新世放射虫。第 2 部分。Entactinaria 和 Spumellaria

在雷滕斯坦山（奥地利北钙质阿尔卑斯山）上，我们对厚达 95 米的下侏罗世灰色硅质石灰岩和泥灰岩演替进行了研究，发现了保存完好、种类繁多的放射虫组合。在跨越志留纪-普利恩巴赫纪边界的演替中，我们发现了 7 个富产的放射虫样本，其中 5 个属于上志留纪，2 个属于下普利恩巴赫纪。本文介绍了属于 Entactinaria 目的 24 个种和 9 个属，以及 Spumellaria 目的 66 个种和 27 个属。其中一个属（Tetractoma Cifer nov. gen.）和六个种被描述为新种：Charlottalum austriacum Cifer nov、在志留纪，Spumellaria 和 Entactinaria 中数量最多的属是 Gorgansium。另一方面，Pliensbachian 样本则以 Archaeocenosphaera 和 Praeconocaryomma 属为主。本报告提供了地层和地理范围汇编以及异名、描述和备注。

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来源期刊

REVUE DE MICROPALEONTOLOGIE PALEONTOLOGY-

CiteScore

2.50

自引率

0.00%

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期刊介绍： La Revue de micropaléontologie publie 4 fois par an des articles de intérêt international, consacrés à tous les aspects de la micropaléontologie. Les textes, en anglais ou en français, sont des articles originaux, des résultats de recherche, des synthèses et mises au point, des comptes rendus de réunions scientifiques et des analyses de ouvrages. La revue se veut résolument ouverte à tous les aspects de la micropaléontologie en accueillant des travaux traitant de la systématique des microfossiles (et de leurs équivalents actuels), des bactéries aux microrestes de vertébrés, et de toutes leurs applications en sciences biologiques et géologiques.