Tropidophora winckworthi E. Fischer-Piette, 1949
Chondropoma woodringi P. Bartsch, 1947
Annularisca wrighti C. de la Torre & P. Bartsch,1941
Chondropoma wrighti (L. Pfeiffer, 1862)
Chondrothyra wrighti C. de la Torre & P. Bartsch,1938
Rhytidopoma wrightianum (J. Gundlach in R. Arango,1881)
Tropidophora xanthocheila G.B. Sowerby, 1850
Colobostylus xanthostoma (G.B. I Sowerby, 1843)
Chondropoma xenicum H.A. Pilsbry, 1933
Colobostylus yallahensis (C.B. Adams, 1851)
Parachondria yaquense P. Bartsch, 1946
Annularisca yaterasensis (L. Pfeiffer, 1865)
Chondropoma yucayum (Presas in L. Pfeiffer,1863)
Annularisca yumuriensis C. de la Torre & P. Bartsch,1941
Annularia yunguensis (L. Pfeiffer)
Chondropoma yunquei H.B. Baker, 1941
Annularisca yunquensis (L. Pfeiffer, 1860)
Lithidion zajonzi E. Neubert, 2002
Tropidophora zanguebarica (S.A.A. Petit De La Saussaye, 1850)
Diplopoma zayasi (M.L. Jaume, 1984)
Tropidophora zonata S.A.A. Petit De La Saussaye,1850
Chondropoma zorrillae M.L. Jaume, 1984