The nine species of Mabea, some with subspecies, recognized for the Guianas are keyed out and listed with their synonyms and distributions. Several of these species are lectotypified. One new species is described: M. angularis den Hollander, while four new combinations are made: M. montana Müller-Argoviensis subsp. biglandulosa (Müller-Argoviensis) den Hollander, M. montana Müller-Argoviensis subsp. lucida (Pax & K. Hoffmann) den Hollander, M. setulosa (Müller- Argoviensis) den Hollander, and M. speciosa Müller-Argoviensis subsp. concolor (Müller- Argoviensis) den Hollander.