 Macrogastra attenuata attenuata CLAUSILIIDAE |
 Macrogastra attenuata iriana CLAUSILIIDAE |
 Macrogastra attenuata lineolata CLAUSILIIDAE |
 Macrogastra attenuata mellae CLAUSILIIDAE |
 Macrogastra badia CLAUSILIIDAE |
 Macrogastra densestriata CLAUSILIIDAE |
 Macrogastra plicatula CLAUSILIIDAE |
 Macrogastra ventricosa CLAUSILIIDAE |
 Macularia niciensis HELICIDAE |
 Malacolimax tenellus LIMACIDAE |
 Marmorana fuscolabiata HELICIDAE |
 Marmorana saxetana HELICIDAE |
 Marmorana serpentina HELICIDAE |
 Marmorana signata HELICIDAE |
 Marstoniopsis insubrica HYDROBIIDAE |
 Medora dalmatina CLAUSILIIDAE |
 Medora macascarensis CLAUSILIIDAE |
 Melanoides tuberculata THIARIDAE |
 Melanopsis etrusca MELANOPSIDAE |
 Mercuria similis HYDROBIIDAE |
 Mercuria zopissa HYDROBIIDAE |
 Microcondylaea compressa UNIONIDAE |
 Microxeromagna lowei HYGROMIIDAE |
 Milax gagates MILACIDAE |
 Milax nigricans MILACIDAE |
 Moitessieria massoti HYDROBIIDAE |
 Moitessieria simoniana HYDROBIIDAE |
 Monacha cantiana HYGROMIIDAE |
 Monacha cartusiana HYGROMIIDAE |
 Monacha consona HYGROMIIDAE |
 Monacha gregaria HYGROMIIDAE |
 Monacha orsinii HYGROMIIDAE |
 Monacha parumcincta HYGROMIIDAE |
 Monacha rizzae HYGROMIIDAE |
 Monacha ruffoi HYGROMIIDAE |
 Monachoides incarnatus HYGROMIIDAE |
 Murella globularis HELICIDAE |
 Murella muralis HELICIDAE |
 Murella nebrodensis HELICIDAE |
 Murella platychela HELICIDAE |
 Murella scabriuscula HELICIDAE |
 Murella sicana HELICIDAE |
 Musculium lacustre SPHAERIIDAE |
 Muticaria neuteboomi CLAUSILIIDAE |
 Muticaria syracusana CLAUSILIIDAE |
 Myosotella denticulata ELLOBIIDAE |
 Myosotella myosotis ELLOBIIDAE |
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