- Hydrocolus stagnalis, Hydroporus stagnalis;Hydroporus collaris LeConte, 1855;Hydroporus aequus Fall, 1919
- Scatella stagnalis, Ephydra stagnalis;Ephydra lacustris Meigen, 1830;Scatella buccata Robineau-Desvoidy, 1830;Scatella tateyamana Matsumura, 1915
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