Conchophthirus discophorus Mermod, 1914

Hosts and countries: Anodonta californiensis, USA. Euglesa casertana (cited as Pisidium casertanum), Poland. Margaritifera falcata, USA. Musculium lacustre, Poland. Pisidium obtusale, Poland. Pisidium sp., Poland. Sphaerium corneum, Poland.

References: Raabe (1971); Antipa et al. (2020).