We describe a new species of Prosopistoma collected in the High Atlas Mountains of Morocco. Prosopistomamaroccanum sp. nov. appears to be morphologically more similar to the European highly endangered P.pennigerum (Müller, 1785) than to the other Maghrebian species, P.alaini Bojkova & Soldán, 2015. A gene tree including the few available barcode sequences of Palearctic Prosopistoma specimens is provided. Possible affinities with West African species are also discussed.
Keywords: High Atlas Mountains; North Africa; Western Palearctic; mayfly.
Majida El Alami, Mokhtar Benlasri, Michel Sartori, Laurent Vuataz, Mohamed Ghamizi.