[Experimental Research on the Biological Cycle of Phyllodistomum Elongatum Nybelin, 1926 (Digenea: Gorgoderidae Looss, 1901)]

Experimental infection of Tinca tinca and Carassius auratus have demonstrated that Cercaria duplicata von Baer, 1827 is the larval form of Phyllodistomum elongatum Nybelin, 1926 and that the life-cycle occurs between Anodonta cygnea (intermediate host) and Tinca tinca or Carassius auratus (final host) without a second intermediate host. The life-history experimentally completed in the laboratory occurs in the following way: -- adult in the ureters of Tinca tinca and Carassius auratus; -- mother sporocyst and daughter sporocyst of Phyllodistorum elongatum in Anodonta cygnea give rise to the large-tailed rhopalocercous cercaria; -- metacercaria encysted within transformed tail in water.