Onoba lincta (R.B. Watson, 1873)
Onoba litiopaopsis (FOSSIL) Gardner, 1947 †
Onoba lubrica (H.H. Suter, 1908)
Onoba lusciniae (R.B. Watson, 1886)
Onoba macra (R.B. Watson, 1886)
Onoba marylandica (FOSSIL) Martin, 1904 †
Onoba melvilli (C. Hedley, 1916)
Onoba merelinoides H.W. Worsfold, G.J. Avern& W.F. Ponder, 1993
Onoba mighelsii (W. Stimpson, 1851)
Onoba milleri (L. de Folin, 1871)
Onoba mirifica A. Adams, 1853
Onoba moreleti P. Dautzenberg, 1889
Onoba morioria (A.W.B. Powell, 1933)
Onoba multilirata (W.L. May, 1915)
Onoba muriei (P. Bartsch & H.A. Rehder,1939)
Onoba nikolarianae J.J. Oberling, 1970
Onoba nivosa A.W.B. Powell, 1957
Onoba nunezi E. Rolán & J.M. Hernández,2004
Onoba obessa J. Grant-Mackie& M. Chapman-Smith, 1971
Onoba obliqua (A. Warén, 1974)
Onoba obliquata (A.W.B. Powell, 1940)
Onoba oligochordata Güller & Zelaya, 2017
Onoba oliveri (A.W.B. Powell, 1955)
Onoba oliverioi C. Smriglio & P. Mariottini,2000
Onoba ovata (K.H.J. Thiele, 1912)
Onoba palmeri (W.H. Dall, 1919)
Onoba parvula (A.W.B. Powell, 1931)
Onoba paucicarinata W.F. Ponder, 1983
Onoba paucicostata (A.W.B. Powell, 1931)
Onoba paucilirata (J.C. Melvill & R. Standen,1912)
Onoba paupereques (H.J. Finlay, 1926)
Onoba perplexa (FOSSIL) (Finlay, 1924 †)
Onoba platia (E.A. Smith, 1890)
Onoba protofimbriata W.F. Ponder & H.W. Worsfold,1994
Onoba protopustulata W.F. Ponder & H.W. Worsfold,1994