Ballerio, A. 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 (Nov. 2021), 105–282. DOI:https://doi.org/10.13133/2284-4880/545.