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Sheds, Nymphal skins or Exuviae of the Blue-winged Olive mayfly (Fam. Ephemerellidae) on a stone in the San River, Myczkowce, Poland.
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Sheds, Nymphal skins or Exuviae of the Blue-winged Olive mayfly (Fam. Ephemerellidae) on a stone in the San River, Myczkowce, Poland.