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The present confusion in the taxonomy of species of Daphnia permits no final identification. Probably it is a form of D. pulex.
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Schrader, F. The cytology of pseudo-sexual eggs in a species of daphnia. Z.Ver-erbungslehre 40, 1–27 (1926). https://doi.org/10.1007/BF01740942
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DOI: https://doi.org/10.1007/BF01740942