Tucetona traversi (FOSSIL) (F.W. Hutton, 1873 †)
Glycymeris trelissickensis (FOSSIL) J. Marwick, 1923 †
Glycymeris trigonella (FOSSIL) T.A. Conrad, 1833 †
Tucetona tsugioi A. Matsukuma, 1984
Glycymeris tumefactus (FOSSIL) H.A. Pilsbry & J. Brown,1917 †
Glycymeris undata (C. Linnaeus, 1758)
Tucetona usiacurii (FOSSIL) (Anderson, 1929 †)
Glycymeris utcholokensis (FOSSIL) Ilyina, 1962 †
Glycymeris vancouverensis (FOSSIL) (Clark & Arnold 1923) †
Glycymeris vanhengstumi J. Goud & G.S. Gulden,2009
Glycymeris variabilis (FOSSIL) (Sowerby, 1824 †)
Glycymeris vaughani (FOSSIL) Woods †
Glycymeris vestita R.W. Dunker, 1877
Glycymeris viamediae (FOSSIL) C.J. Maury, 1912 †
Costaglycymeris virginiae (FOSSIL) (Wagner, 1848 †)
Melaxinaea vitrea (J.B.P.A. Lamarck, 1819)
Glycymeris waipipiensis (FOSSIL) J. Marwick, 1923 †
Tucetona wairarapaensis (FOSSIL) (Powell, 1938 †)
Glycymeris waitakiensis (FOSSIL) J. Marwick, 1923 †
Costaglycymeris waltonensis (FOSSIL) (Gardner, 1947 †)
Glycymeris wateleti (FOSSIL) G.P. Deshayes, 1858 †
Glycymeris woodsi (FOSSIL) Clark & J.W. Durham,1946 †
Glycymeris wrigleyi (FOSSIL) Curry, 1958 †
Glycymeris yessoensis G.B. III Sowerby, 1886