Montanomelon reynoldsi G.A. Solem, 1993
Chloritis rhinocerotica (P.M. Heude, 1890)
Amphidromus rhodostylus O.F. von Möllendorff,1901
Papuina rhynchotus C.R. Böttger, 1918
Amphidromus richardi M. Severns, 2006
Rhagada richardsonii (E.A. Smith, 1874)
Amphidromus richgoldbergi Thach & F. Huber, 2017
Thersites richmondianus (L.A. Reeve, 1852)
Amphidromus ristiae B. Dharma, 2007
Exiligada rivifontis F. Criscione, A. Law& F. Köhler, 2012
Sphaerospira rockhamptonensis J.C. Cox, 1873
Chloritis rohdei W. Kobelt, 1891
Canefriula rolandi T. Iredale, 1941
Rhynchotrochus rollsianus (E.A. Smith, 1887)
Amphidromus roseolabiatus H.C. Fulton, 1896
Semotrachia rossana G.A. Solem, 1993
Obba rota W.J. Broderip, 1841
Landouria rotatoria (G. von dem Busch, 1842)
Amphidromus rottiensis G.L. Chan, S.K. Tan& J. Abbas, 2008
Westraltrachia rotunda G.A. Solem, 1984
Plectorhagada rovina T. Iredale, 1939
Xanthomelon ruberpumilio G.A. Solem, 1979
Papuina rudibunda (C.M. Tapparone-Canefri,1883)
Jacksonena rudis (C. Hedley, 1912)
Cupedora rufofasciata (J.W. Brazier, 1875)
Papuina rufopurpurea E.A. Smith, 1887
Plectorhagada ruga (B.C. Cotton, 1953)
Planispira ruginosa (A.E.J. Férussac, 1832)
Satsuma rugosus (J.T. Kuroda & H. Minato,1981)
Semotrachia runutjirbana G.A. Solem, 1993
Xanthomelon saginatum (T. Iredale, 1938)
Camaena sakishimana (J.T. Kuroda, 1960)
Amphidromus salzmanni Thach & F. Huber, 2017
Amphidromus sancangensis B. Dharma, 2007
Australocosmica sanctumpatriciusae F. Köhler, 2011