Hydrobia dollfusi Wenz, 1913 † (original description)
Hydrobia elongata var. carinulata Wenz, 1913 † accepted as Hydrobia gregaria (Schlotheim, 1820) † (original description)
Hydrobia obtusa aperta Wenz, 1913 † (original description)
Hydrobia obtusa incrassata Wenz, 1913 † (original description)
Hydrobia obtusa mut. distorta Wenz, 1913 † accepted as Hydrobia tenuimarginata (Ludwig, 1865) † (original description)
Hydrobia obtusa tenuis Wenz, 1913 † (original description)
Hydrobia obtusa umbilicalis Wenz, 1925 † (additional source)
Hydrobia obtusa umbilicata Wenz, 1913 † accepted as Hydrobia obtusa umbilicalis Wenz, 1925 † (original description)