Endemic Ectosymbiotic Branchiobdellidans (Annelida : Citellata) reported on three "export" species of north Amercican Crayfish (Crustacea : Astacoidea) Stuart R. Gelder 2004, Freshwater crayfish.
Redescription and designation of lectotypes of the North Amercian Cambarincola okadaï Yamaguchi, 1933 (Annelida : Citellata : Branchiodbellidae), Stuart R. Gelder and Akifumi Ohtaka, 2000, Proceeding of the biological society of Washington.
BRANCHIOBDELLIDAE
"First report of two North American branchiobdellidans (Annelida: Clitellata) or crayfish worms on signal crayfish in Europe with a discussion of similar introductions into Japan. S. R. Gelder, J-F Parpet & F. Quaglio, Ann. Limnol. - Int. J. Lim. 48 (2012) 315–322." (http://www.limnology-journal.org/articles/limn/pdf/2012/03/limn120016.pdf)