(syn. Metechinorhynchus jucundum ( Travassos, 1923) Petrochenko, 1956)
Actinopterygii Piaractus mesopotamicus (Holmberg) ( Characiformes, Serrasalmidae). SI: intestine. SD: adult. L: Corrientes Province: Paraná River (near Corrientes City). R: Hamann and Lombardero ( 1981 –1982), Hamann (1982a), Tanzola et al. (2009), Chemes and Takemoto (2011). C: vouchers (CECOAL accession numbers not provided).