New species and new record of the genus Cheloniodiplostomum (Trematoda, Proterodiplostomidae, Polycotylinae), parasites of freshwater turtles from Argentina.

The aim of the present paper is to describe a new species of the genus Cheloniodiplostomum (Digenea, Proterodiplostomidae) in the Hilaire's toadhead turtle Phrynops hilarii from Argentina and to expand the geographic and host distribution of Cheloniodiplostomum testudinis. Additionally, we present a diagnostic key for Cheloniodiplostomum.