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首页> 外文期刊>Facies >Fish otoliths from the pre-evaporitic (Early Messinian) sediments of northern Italy: their stratigraphic and palaeobiogeographic significance
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Fish otoliths from the pre-evaporitic (Early Messinian) sediments of northern Italy: their stratigraphic and palaeobiogeographic significance

机译：意大利北部蒸发前（早墨西拿）沉积物中的鱼耳石：其地层和古生物地理意义

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The study of otolith assemblages from the pre-evaporitic Messinian deposits allows the reconstruction of a fauna of 79 taxa of which 35 could be identified at the specific level. Three of these are new: Diaphus rubus, Myctophum coppa, and Uranoscopus ciabatta. The assemblages reflect mainly a neritic environment influenced by the oceanic realm. Analysis of the global present-day geographic distribution of 42 of the recognised Messinian genera indicates that 88% of these are still living in the Mediterranean, 98% in the Atlantic and 78% in the Indo-Pacific realm. These results are in good agreement with the evolutionary trends documented for the Oligocene and Miocene teleost fauna, specifically an increase in percentage of genera inhabiting the modern Mediterranean, a very high percentage of Atlantic and Indo-Pacific genera, and a slight fall of the importance of present-day Indo-Pacific genera from the Rupelian up to the Late Miocene. Analysing the composition of the Early Messinian fauna at the level of nominal species indicates that about 53% of the species represented in the assemblages are still living in the Recent Mediterranean, and that a significant number of these were already present in the Tortonian. It is interesting that these species are mainly neritic. This seems to confirm that the close affinity of the fossil assemblage with the present-day Mediterranean neritic fauna, which was already recorded at the genus level for the Rupelian fauna, persists during the Neogene and continues until the Pleistocene.
机译：对从蒸发前的墨西尼沉积物中的耳石组合进行的研究可以重建一个79个分类单元的动物群，其中35个可以在特定水平上被识别。其中三个是新的：Dia蛇，Myctophum coppa和Uranoscopus ciabatta。这些组合主要反映了受海洋领域影响的恶劣环境。对42个公认的墨西拿属的全球当今地理分布的分析表明，其中88％的人仍生活在地中海，98％的人仍在大西洋，而78％的人在印度太平洋地区。这些结果与渐新世和中新世硬骨动物群的进化趋势很好地吻合，特别是居住在现代地中海的属的百分比增加，大西洋和印度太平洋的属的百分比很高，重要性的略微下降从Rupelian到中新世晚期的Indo-Pacific属。以名义物种的水平分析早期墨西拿动物区系的组成表明，该组合中约有53％的物种仍生活在最近的地中海中，并且其中很多已经存在于Tortonian中。有趣的是，这些物种主要是爬行动物。这似乎证实了化石组合与当今地中海类动物群的密切亲缘关系，这种亲缘关系已在新世纪期间持续存在，并一直持续到更新世。

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