Two new species of the genera Islamia and Mercuria (Gastropoda, Hydrobiidae) from Morocco Author Mabrouki, Youness Université Sidi Mohamed Ben Abdellah, Faculté des Sciences de Dhar El Mehraz, Laboratoire de Biotechnologie, Conservation et Valorisation des Ressources Naturelles, Fes, Morocco. E-mail: younes _ mab @ hotmail. fr Author Glöer, Peter Schulstr. 3, D- 25491 Hetlingen, Germany. E-mail: gloeer @ malaco. de Author Taybi, Abdelkhaleq Fouzi Université Mohammed Premier, Faculté Pluridisciplinaire de Nador, Équipe de Recherche en Biologie et Biotechnologie Appliquées. Morocco. E-mail: taybiaf @ gmail. com text Ecologica Montenegrina 2021 2021-02-08 39 76 80 http://dx.doi.org/10.37828/em.2021.39.8 journal article 10.37828/em.2021.39.8 2336-9744 urn:lsid:zoobank.org:pub:DF930EB1-6B0F-4F11-BFFE-D00C22C0E769 Genus Mercuria Boeters, 1971 Type species: Cyclostoma simile Draparnaud, 1805 The shell is milky whitish, especially in the region of the umbilicus. The penis possess a large and flat triangular or rounded lobe. The operculum is light orange.