Additions are made to the Egerian (late Oligocene–early Miocene) gastropod fauna of Esztergom-Szentgyörgymező (Hungary) by description of 27 species. 14 taxa are new records at the locality. A few rare species are represented by newly collected well-preserved specimens, and five new species are designated: Calyptraea baldii n. sp., Cypraeorbis nadaii n. sp., Paziella (Paziella) modesta n. sp., Contortia zitae n. sp., and Clavatula danuvii n. sp. New combinations: Tritia edentata (Báldi, 1966) nov. comb., Cordieria collectiva (Noszky, 1936), nov. comb., Stenodrillia oligocenica (Noszky, 1936) nov. comb. As holotypes of Egerian species were destroyed in 1956, neotypes are designated for five taxa: Euthriofusus szontaghi Noszky, 1936; Eoconus egerensis (Noszky, 1936); Cordieria collectiva (Noszky, 1936); Stenodrillia oligocenica (Noszky, 1936); Turricula telegdirothi (Noszky, 1936).
A Middle Miocene (Early Badenian) Rissooidea assemblage with 19 species of ten genera is described and illustrated from the fossiliferous locality at Letkés (Börzsöny Mts, Hungary). The material represents the most highly diverse occurrence of the superfamily in the Pannonian Basin System. Nine species are recorded for the first time in this region. Rissoa federicoi nom. nov. is proposed as new name for the junior homonym Rissoia (Turboella) acuticosta Sacco, 1895.
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