L. R. L. Simone and R. Casati, “New land mollusk fauna from Serra da Capivara, Piauí, Brazil, with a new genus and five new species (Gastropoda: Orthalicoidea, Streptaxidae, Subulinidae)”, Zootaxa, vol. 3683, no. 2, pp. 145–158, Jul. 2013.