Montanomelon reynoldsi G.A. Solem, 1993 Northern Territory
Chloritis rhinocerotica (P.M. Heude, 1890) South Vietnam
Amphidromus rhodostylus O.F. von Möllendorff,1901 Vietnam44 mm
Papuina rhynchotus C.R. Böttger, 1918 New Ireland, Bismarck Archipelago
Amphidromus richardi M. Severns, 2006 Indonesia, Timor28 mm
Rhagada richardsonii (E.A. Smith, 1874) Western Australia15 mm
Amphidromus richgoldbergi Thach & F. Huber, 2017
Thersites richmondianus (L.A. Reeve, 1852) Australia, Clarence River50 mm
Amphidromus ristiae B. Dharma, 2007 Indonesia, Sumatra41 mm
Exiligada rivifontis F. Criscione, A. Law& F. Köhler, 2012 Australia, Spring Creek
Sphaerospira rockhamptonensis J.C. Cox, 1873 Australia, Rockhampton29 mm
Chloritis rohdei W. Kobelt, 1891 Indonesia, Yapen Island40 mm
Canefriula rolandi T. Iredale, 1941 Papua New Guinea36 mm
Rhynchotrochus rollsianus (E.A. Smith, 1887) Papua New Guinea27,5 mm
Amphidromus roseolabiatus H.C. Fulton, 1896 Laos
Semotrachia rossana G.A. Solem, 1993 Northern Territory
Obba rota W.J. Broderip, 1841 Philippines, Masbate Island30 mm
Landouria rotatoria (G. von dem Busch, 1842) Malaysia, Borneo14 mm
Amphidromus rottiensis G.L. Chan, S.K. Tan& J. Abbas, 2008 Indonesia, Roti Island35 mm
Westraltrachia rotunda G.A. Solem, 1984 Western Australia, Kimberley11 mm
Plectorhagada rovina T. Iredale, 1939 Australia
Xanthomelon ruberpumilio G.A. Solem, 1979 Western Australia, Kimberley
Papuina rudibunda (C.M. Tapparone-Canefri,1883) Papua New Guinea
Jacksonena rudis (C. Hedley, 1912) Queensland
Cupedora rufofasciata (J.W. Brazier, 1875) South Australia
Papuina rufopurpurea E.A. Smith, 1887 Papua New Guinea28 mm
Plectorhagada ruga (B.C. Cotton, 1953) Australia, Exmouth14 mm
Planispira ruginosa (A.E.J. Férussac, 1832) Bangladesh
Satsuma rugosus (J.T. Kuroda& H. Minato, 1981) Japan, Kagoshima
Semotrachia runutjirbana G.A. Solem, 1993 Northern Territory
Xanthomelon saginatum (T. Iredale, 1938) Australia, Atherton42,2 mm
Camaena sakishimana (J.T. Kuroda, 1960) Okinawa
Amphidromus salzmanni Thach & F. Huber, 2017
Amphidromus sancangensis B. Dharma, 2007 Indonesia
Australocosmica sanctumpatriciusae F. Köhler, 2011 Western Australia, Kimberley