Proterodiplostomidae
Proterodiplostomidae is a monotypic family of trematodes in the order Diplostomida. It consists of one subfamily, Polycotylinae Monticelli, 1888, which consists of one genus, Cheloniodiplostomum Sudarikov, 1960, which consists of four species: Cheloniodiplostomum argentinense Palumbo & Diaz, 2018; Cheloniodiplostomum breve ; Cheloniodiplostomum delillei ; and Cheloniodiplostomum testudinis.