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首页> 外文期刊>Palaontologische Zeitschrift >A Middle Miocene endemic freshwater mollusc assemblage from an intramontane Alpine lake (Aflenz Basin, Eastern Alps, Austria)
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A Middle Miocene endemic freshwater mollusc assemblage from an intramontane Alpine lake (Aflenz Basin, Eastern Alps, Austria)

机译：来自山内高山湖泊（奥地利东部阿尔卑斯山阿弗伦茨盆地）的中新世地方性淡水软体动物组合

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摘要

The mollusc fauna of the early Middle Miocene (Langhian) intramontane Alpine Lake Groisenbach is described for the first time. The shells derive from the Feistring Formation in the Aflenz Basin in Austria, which was covered by Lake Groisenbach. The assemblage is moderately diverse with 12 gastropod and 2 bivalve species, suggesting shallow lacustrine and fluvial settings. Among the gastropods, only Theodoxus crenulatus (Klein, 1853) is known from other Miocene localities, whilst all other species are documented so far only from Lake Groisenbach. None of the Early and Middle Miocene lake systems of the Alpine-Carpathian Foredeep and the Balkan Peninsula displays any faunistic resemblance with this new fauna. Even coeval lake faunas from the close-by Graz Basin have no species in common with Lake Groisenbach. This pattern points to a surprising endemicity and biogeographic fragmentation in the Central European freshwater systems during the Early and Middle Miocene. The uniqueness of the newly described fauna is also indicated by the completely erratic occurrence of the otherwise African-Mediterranean genus Bulinus, which is unknown from all other central European Miocene freshwater systems. Emmericia roetzeli Harzhauser and Neubauer nov. sp., Nematurellazuschini Neubauer and Harzhauser nov. sp., Romania fastigata Neubauer and Harzhauser nov. sp., Odontohydrobia groisenbachensis Neubauer and Harzhauser nov. sp., Odontohydrobia pompatica Neubauer and Harzhauser nov. sp., Odontohydrobia styriaca Harzhauser and Neubauer nov. sp., Planorbis austroalpinus Harzhauser and Neubauer nov. sp., Gyraulus sachsenhoferi Harzhauser and Neubauer nov. sp., Bulinus corici Harzhauser and Neubauer nov. sp., Ferrissia crenellata Harzhauser and Neubauer nov. sp. and Stagnicola reinholdkunzi Harzhauser and Neubauer nov. sp. are introduced as new species.
机译：首次描述了中新世中期（Langhian）山内高山湖泊Groisenbach的软体动物区系。贝壳取材于奥地利Aflenz盆地的Feistring地层，被Groisenbach湖覆盖。组合适度多样，有12个腹足类和2个双壳类，表明湖相和河流环境较浅。在腹足动物中，中新世其他地方只知道Theodoxus crenulatus（Klein，1853），而到目前为止，只有格罗森巴赫湖才有其他物种的记载。高山喀尔巴阡山脉的Foredeep和巴尔干半岛的中新世早期和中期湖泊系统都没有与这种新动物区系的任何动物主义相似之处。甚至邻近格拉茨盆地的中世纪湖区动物也没有与格罗森巴赫湖共有的物种。这种模式表明，在中新世早期和中期，中欧淡水系统出现了令人惊讶的地方性和生物地理分裂。新描述的动物区系的独特性还可以通过原本非洲-地中海的Bulinus属的完全不规律发生来表明，而这在所有其他中欧中新世淡水系统中都是未知的。 Emmericia roetzeli Harzhauser和Neubauer nov。 ，Nematurellazuschini Neubauer和Harzhauser nov。罗马尼亚fastigata Neubauer和Harzhauser nov。 sp。，Odontohydrobia groisenbachensis Neubauer和Harzhauser nov。 sp。，Odontohydrobia pompatica Neubauer和Harzhauser nov。 ，Odontohydrobia styriaca Harzhauser和Neubauer nov。 ，Planorbis austroalpinus Harzhauser和Neubauer nov。 ，Gyraulus sachsenhoferi Harzhauser和Neubauer nov。 sp。，Bulinus corici Harzhauser和Neubauer nov。 sp。，Ferrissia crenellata Harzhauser和Neubauer nov。 sp。以及Stagnicola reinholdkunzi Harzhauser和Neubauer nov。 sp。被引入为新物种。

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