Die Land- und Süßwassermollusken im Inselsee bei Güstrow und seiner Umgebung (Deutschland: Landkreis Rostock)
Michael L. Zettler, Holger Menzel-HarloffArchiv Natur- und Landeskunde Mecklenburg-Vorpommern 56 (2019)
https://doi.org/10.30819/anlk.56.03 pp: 52-60 2020-01-29
Stichworte/keywords: Mecklenburg-West-Pomerania, Mollusca, terrestrial, freshwater, Anisus vorticulus, Vallonia enniensis
During the 38th mapping meeting of the working group malacology in Mecklenburg-West Pomerania, the land and fresh water molluscs of Lake Inselsee and vicinity near Güstrow were assessed, to provide a substantial contribution to the knowledge of mollusc mapping in our federal state. In this previously only sporadically studied area, as much as 103 species were recorded. The results were compared with earlier studies. Within Lake Inselsee, three species were found for the first time: Ferrissia fragilis, Marstoniopsis scholtzi and Pseudanodonta complanata. Six of the formerly recorded species were not found again. Altogether 51 species of molluscan fauna are known from the lake. Theodoxus fluviatilis was observed as empty shells only and has probably disappeared within recent years owing to predation by the invasive Ponto–Caspian amphipod Dikerogammarus villosus. In fen lakes near Lake Inselsee we encountered Anisus vorticulus, a species listed in the EU Habitats Directive (annex II and IV). Among the recorded 52 land snail species, the record of fresh shells of Vallonia enniensis is worth mentioning in particular.
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