Brasilennea minor is a fossil species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Cerionidae, from the Paleocene Itaboraí Basin, Brazil.Salvador, R.B.; Rowson, B.; Simone, L.R.L. 2011. "Rewriting the fossil history of Cerionidae (Gastropoda: Pulmonata): new family assignment of the Brazilian Palaeocene genus Brasilennea Maury, 1935". Journal of Molluscan Studies 77: 445–447. Brasilennea minor is the smallest species in the genus Brasilennea; it was originally described as a smaller variant of Brasilennea arethusae (as reflected by its specific epithet), but was later raised to the rank of species.Brito, I.M. 1967. Gastrópodos continentais do Paleoceno do estado do Rio de Janeiro, Brasil. Boletim de Geologia do Instituto de Geociências da Universidade Federal do Rio de Janeiro 1: 7-28.
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