The freshwater jellyfish Craspedacusta sowerbii Lankester, 1880 (Limnomedusa: Olindiidae) in Germany, with a brief note on its nomenclature

Abstract

The freshwater jellyfish Craspedacusta sowerbii Lankester is distributed worldwide in temperate, freshwater habitats. However, such a successful, worldwide dispersion of the medusa and its minute, less obvious polyp is unique among the freshwater jellyfish species (Limnomedusae, Olinidiae). Although numerous reports were given shortly after its discovery, the interest did not cease over the years. In cooperation with the German Underwater Federation (Verband Deutscher Sporttaucher e. V.) additional data of freshwater jellyfish occurrences could be obtained. In combination with previously published discovery reports, these data provide an area-wide observation of the distribution of freshwater jellyfish within the Federal Republic of Germany, adding 21 to the previously known C. sowerbii locations. Indications are that there is a far more wide spread distribution of the medusa than thought and the potentially even wider distribution of the often times overlooked polyp.

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