RESEARCH NOTE Rewriting the fossil history of Cerionidae (Gastropoda, Pulmonata): new family assignment of the Brazilian Palaeocene genus Brasilennea Maury, 1935

preserved terrestrial pulmonates: 18 species have been described to date, mainly in Bulimulidae/Orthalicidae (Simone & Mezzalira, 1994). Following mammal correlations, the Itaboraı ́ limestones are now agreed to be of Palaeocene age (e.g. Paula Couto, 1952; Medeiros & Bergqvist, 1999) and, more precisely, the pulmonate fauna to be of Middle to Late Palaeocene age, although influential past malacological works have listed its pulmonate taxa as Miocene or Pliocene (e.g. Zilch, 1959–1960; Parodiz, 1969). Itaboraı́’s fossils are a valu-able tool for studying the evolution of South American taxa due to their early Cenozoic age and the basin location. The genus Brasilennea Maury, 1935 is known only from the Itaboraı ́ basin. The type species (by original designation) is B. arethusae Maury, 1935, with B. minor Trindade, 1956 at first considered a variation, now considered a second sympatri