Iniesta, L. F. M.; Ferreira, R. L. (2014). New species of Pseudonannolene Silvestri, 1895 from Brazilian limestone caves with comments on the potential distribution of the genus in South America (Spirostreptida: Pseudonannolenidae). Zootaxa. 3846(3): 361.
<strong>New species of <em>Pseudonannolene</em> Silvestri, 1895 from Brazilian limestone caves with comments on the potential distribution of the genus in South America (Spirostreptida: Pseudonannolenidae)</strong>