New species described from Brazil: Sphagoeme acuta (Minas Gerais) and Aleiphaquilon rugosum (Rio Grande do Sul). Key to the species of the genera Sphagoeme Aurivillius (Oemini); Aleiphaquilon Martins (Callidiopini) and Gigantotrichoderes Tippmann (Trachiderini, Torneutina) are presented. G. flabellicomis (Zajciw, 1965) is revalidaled.
Coleoptera; Cerambycidae; Gigantotrichoderes; Sphagoeme; Aleiphaquilon