Description of Radiodiscus vazi, sp.n. from São Paulo, Brazil and the recombination of two other species of this genus and R. bolachaensts, nom.n. and the synonymization of a species of Radioconus are proposed (Gastropoda, Stylommatophora, Charopidae)

Radiodiscus vazi. sp.n. is described. Synonymizations of Zichogyra cleliae Weyrauch, 1965 under Radiodiscus pilsbryi Scott, 1957 and Radiodiscus patagonicus (Suter, 1900), comb.n. - non Radiodiscus patagonicus Pilsbry, 1911 - and Radiodiscus iheringi (Ancey, 1S99), comb.n. - non Radiodiscus jheringi (Thiele, 1927) - are proposed with Radiodiscus bolachaensis. nom.n.

Endodontoidea; Charopidae; Radiodiscus bolachacnsis; systematics