Da Fonseca, C. R. V., Barbosa, M. L. L., & Fernandez, M. F. S. (2011). A hypothetical evolutionary history of passalid beetles narrated by the comparative anatomy of the hindgut (Coleoptera: Passalidae). Zootaxa, 3012(1), 1–20. https://doi.org/10.11646/zootaxa.3012.1.1