5/25/2023 0 Comments Dsa 4 1 regelwerk pdf download![]() During the Early and Middle Miocene, it displayed a major evolutionary hotspot resulting in a high level of endemicity. The Dinaride Lake System, as one of the largest freshwater systems in the Neogene of Europe, is widely known for its exceptional mollusc fauna. A lectotype for Nematurella minima Tesch, 1939, is designated. Three small euryhaline prosobranchs are recorded as fossils from The Netherlands for the first time: Hydrobia neglecta Muus, 1963 Semisalsa stagnorum (Gmelin, 1791) and Paludinella littorina (Chiaje, 1828)]. The taxonomy of several other species is revised. Other species are demonstrated to represent new taxa and are here described (Viviparus teschi n.sp., Bithynia (Neumayria) bavelensis n.sp., Fagotia wuesti n.sp., Planorbarius peetersi n.sp., Sphaerium (Sphaeriastrum) rosmalense n.sp.). The species Theodoxus serratiliniformis Geyer, 1914, Nematurella stenostoma Nordmann, 1901 and Dreissena polymorpha (Pallas, 1771), which were recorded previously from the Dutch Quaternary, do in fact not occur. Quaternary freshwater molluscs of The Netherlands are reviewed.
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