Ballerio, Alberto. 2021. “The Ceratocanthinae of Madagascar and Comoro Islands: A Revision of the Genera Synarmostes and Goudotostes, and of the Flightless Philharmostes, With Description of 64 New Species (Coleoptera: Scarabaeoidea: Hybosoridae)”. Fragmenta Entomologica 53 (2):105-282. https://doi.org/10.13133/2284-4880/545.