Abstract A new genus of Macrotomini (Coleoptera, Cerambycidae, Prioninae). Allomallodon gen. n. is erected to accommodate Mallodon hermaphroditum Thomson, 1867, and M. popelairei Lameere, 1902. The assignment of this new genus to Macrotomini, and the validity of Mallodontini are discussed. As result, Mallodontini is considered a synonym of Macrotomini. A key to species of the new genus is included as well.