Vaz-De-Mello, F. Z. and Génier, F. (2005) “Lectotype designations, new synonymies, and new species in the genera Trichillum Harold and Pedaridium Harold (Coleoptera: Scarabaeidae: Scarabaeinae)”, Zootaxa. Auckland, New Zealand, 1038(1), pp. 41–52. doi: 10.11646/zootaxa.1038.1.4.