Abstract

The results of a taxonomic and morphological revision of Mionetta natator (Milne-Edwards, 1867) from the lower Miocene of Western and Central Europe are presented. It is shown that the collections of small ducks from the Saint-Gérand-le-Puy localities (France) do indeed contain a small species of the genus Mionetta, which is here described as Mionetta defossa sp. nov. However, Mionetta natator represents a separate taxon, and is here assigned to the genus Caerulonettion gen. nov., showing morphological similarities with extant Malacorhynchus and fossil Mioquerquedula spp. The first small ducks from the lower Miocene of Kazakhstan are also described (Aral Formation, the Agyspe and Altynshokysu localities; Akzhar Formation, the Golubye Peski locality), tentatively attributed to Mionetta defossa and Mionetta sp. The diversity and relationships of small ducks of the Early and Middle Miocene of Eurasia are discussed.

中文翻译：

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来自欧亚大陆早中新世的小鸭（鸟纲：鸭科）。3. Mionetta natator 的修订版（Milne-Edwards，1867）

摘要

介绍了来自西欧和中欧下中新世的Mionetta natator (Milne-Edwards, 1867)的分类学和形态学修订结果。结果表明，来自法国 Saint-Gérand-le-Puy 地区的小鸭子确实含有 Mionetta 属的一个小种，这里将其描述为Mionetta defossa sp。十一月 然而，Mionetta natator代表一个单独的分类群，在这里被分配到Caerulonettion gen 属。十一月，显示出与现存的Malacorhynchus和化石Mioquerquedula spp 的形态相似性。还描述了来自哈萨克斯坦中新世下部的第一批小鸭子（Aral 组，Agyspe 和 Altynshokysu 地区；Akzhar 组，Golubye Peski 地区），暂时归因于Mionetta defossa和Mionetta sp。讨论了欧亚大陆早中新世小鸭的多样性和亲缘关系。