Macopaeus is a genus of jumping spiders endemic to Madagascar. It contains only one species, Macopaeus spinosus. Two other species (M. celebensis <small>Merian, 1911</small> and M. madagascarensis <small>Peckham & Peckham, 1903</small>) were described in this genus in the early 20th century. However, these were transferred to the genus Brettus in 1980.