Abstract
Planaria alpina has been considered as very limited in its distribution and has played an important part in the theoretical discussions of the preglacial and the postglacial fauna of Europe. It has been reported from England, from various parts of southern Europe, from Scandinavia (cf. A. Thienemann, “Planaria alpina auf Rügen und die Eiszeit”, Jahresb. Geogr. Ges. Greifswald., 10; 1906), and recently from Finland (A. Luther). It appears that this animal, with the notable exception of Finland, has not been found east of the Baltic Sea. It has never been reported from Prussia, from the Baltic States, or from the adjacent parts of Russia. Dr. A. Luther considers that specimens found in Finland show a relationship with Scandinavia, that is, with the countries west of the Baltic rather than those of the east. I have found Planaria alpina, however, on the eastern coast of the Baltic as well.
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SIVICKIS, P. Planarla alpina in Lithuania. Nature 124, 579 (1929). https://doi.org/10.1038/124579a0
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DOI: https://doi.org/10.1038/124579a0
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