Figures in: Hart & Hart 1974. Habitat: Rivers. Mode of life: Commensal on the red swamp crayfish Procambarus clarkii, typically found on the gills. Reproduction mode: Sexual. Known distribution: Tokyo (Ohtaka et al. 2017). Elsewhere, western USA, Spain, England and the Czech Republic (see references in Ohtaka et al. 2017). Notes: This is an invasive species in Japan, originating from the USA (Ohtaka et al. 2017).
References:
Ohtaka, A., Gelder, S. R. & Smith, R. J. 2017. Long-anticipated new records of an ectosymbiotic branchiobdellidan and an ostracod on the North American red swamp crayfish, Procambarus clarkii (Girard, 1852) from an urban stream in Tokyo, Japan. Plankton and Benthos Research, 12, 123-128.