Two new valvatoid genera (Gastropoda, Hydrobiidae) from Morocco Author Glöer, Peter Schulstr. 3, D- 25491 Hetlingen, Germany. E-mail: gloeer @ malaco. de 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 / Moroccan wildlife Photographers, Cultural center Menara, Gueliz Marrakech, Morocco. E-mail: younes _ mab @ hotmail. fr Author Taybi, Abdelkhaleq Fouzi 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: taybiaf @ gmail. com text Ecologica Montenegrina 2020 2020-04-23 30 124 128 http://dx.doi.org/10.37828/em.2020.30.12 journal article 10.37828/em.2020.30.12 2336-9744 13231289 urn:lsid:zoobank.org:pub:9C733433-9E65-4D7D-A969-4A3DFA20D43D Fessia aouintii n. sp. (fig. 3) Material studied : Holotype : H = 0.7 mm , D = 1.2 mm , ZMH 140696 ; 5 paratypes ( ZMH 140697 ), 6 in coll. Mebrouki , 3 in coll. Glöer. Type locality : Morocco , Aouinat El Hajjaj , Fez prefecture, 34°01'39.1"N 4°58'24.1"W , 16.02.2020 leg . Figure 3. Fessia aouintii n. sp. 1: frontal view (holotype), 2: apical view (holotype), 3: apical view (paratype, photographed under ethanol), 4: umbilcal view (holotype), 5: head with penis (lateral view). Abbriviations: e = eye, o = operculum, p = penis. Etymology : Named after the type locality. Habitat : Aouinat El Hajjaj is a rheocenous natural spring, located at Fez prefectur at an altitude of 409 m above sea level. The grain size of the bottom consists of stones, pebbles and sand, the vegetation of the banks is very heterogeneous and highly disturbed. Located in the Oued Wisslane watershed near a weekly market ‘souk’, which has subjected it to very strong anthropogenic action, through solid and liquid waste, habitat loss and water abstraction. In addition, the entire area could be suffering from agricultural runoff and drainage of water. Consequently, the population of Fessia aouintii n. gen. n. sp. would be highly vulnerable, and it is arguably the most threatened hydrobid of Morocco . Major efforts are needed for its conservation, including studies on its biological and ecological knowledge. Description Shell: The tiny valvatoid shell is translucent with a silky surface. The 3.5 whorls are fast and rapidly growing separated by a deep suture. The body whorl is prominent and descends slowly on the shell wall. The shell is 0.8 mm high and 1.2 mm in diameter. Animal : White with dark brown mantle pigmentation. Eye-spots large and visible. Penis : Relatively small and flat with a broad basis and tapered at the distal end. Operculum : Operculum flexible, without any peg, dark yellowish. Distribution: Morocco , only known from the type locality.