Material collected in 1974 during the Austrian Hydrobiological Mission of F. Starmühlner to Comoros and recent years by one authors (NM) course an ongoing freshwater monitoring program Mayotte is basis this first larger study mayfly family Baetidae Archipelago (Comoros, Mayotte). We identified eight different species using morphological characters, four on both Mayotte, three only only. Two spe...

Recent research in various Moroccan areas allowed an update and a revision of the Ephemeroptera checklist. In this case, 54 species are now listed, belonging to 10 families 26 genera. The distribution all studied is discussed, as well their biogeographical affinities. Mayflies characterized by clear dominance Mediterranean elements with strong rate endemism (33.4%).