Breure, Abraham S. H., and Jan Schlögl. 2010. “Additional Notes on Orthalicidae from the Chimantá Massif, Venezuelan Guayana, With Descriptions of New Species of Plekocheilus Guilding, 1828 (Mollusca: Gastropoda)”. Zootaxa 2416 (1). Auckland, New Zealand:51–60. https://doi.org/10.11646/zootaxa.2416.1.3.