Trivellona multicostata (W. Liltved, 1986)
Gregoia multidentata Fehse, 2017
Trivia multilirata (G.B. II Sowerby, 1870)
Trivia multiradiata G.B. Sowerby, 1872
Dolichupis myrae (G.B. Campbell, 1961)
Hespererato nanhaiensis X.T. Ma, 1994
Trivia napolina (L.C. Kiener, 1843)
Trivirostra natalensis F.A. Schilder, 1932
Triviella neglecta F.A. Schilder, 1930
Proterato neozelanica (FOSSIL) (H.H. Suter, 1917 †)
Niveria nicolettae D. Fehse, 1997
Niveria nix (F.A. Schilder, 1922)
Trivia noetlingi (FOSSIL) E.W. Vredenburg, 1921 †
Gregoia nuda Fehse, 2017
Trivirostra obliqua Fehse, 2017
Trivirostra obscura (J.S. Gaskoin, 1849)
Cleotrivia occidentalis (F.A. Schilder, 1922)
Erato oligostata W.H. Dall, 1902
Proterato olivaria (J.C. Melvill, 1899)
Trivellona opalina (J.T. Kuroda& C.N. Cate in C.N. Cate, 1979)
Pusula orientalis (FOSSIL) Schilder, 1939 †
Trivirostra oryza (J.B.P.A. Lamarck, 1810)
Ellatrivia oryzoidea (T. Iredale, 1935)
Gregoia oscilla Fehse, 2017
Trivirostra oshimaensis C.N. Cate, 1979
Notoficula otagoensis R.K. Dell, 1962
Trivellona ovata Fehse, 2017
Triviella ovulata (J.B.P.A. Lamarck, 1810)
Pusula pacei (E.J. Petuch, 1987)
Niveria pacifica (G.B. II Sowerby, 1832)
Pusula padreserrai C.N. Cate, 1979
Gregoia paenegloba D. Fehse, 2015
Eratoena pagoboi (T. Cossignani& V. Cossignani, 1997)
Alaerato palawanica (D. Fehse, 2011)
Hespererato pallida A. Oleinik, E.J. Petuch& W.C. Aley IV, 2012