Ohtaka, A., and S. R. Gelder. “A Taxonomic Reassessment of Cirrodrilus japonicus (Pierantoni, 1912) (Annelida, Clitellata, Branchiobdellida)”. Zootaxa, vol. 5263, no. 4, Apr. 2023, pp. 557-65, doi:10.11646/zootaxa.5263.4.7.