Modiolopsis modiolaris (FOSSIL) (T.A. Conrad, 1838 †)
Modiolopsis modiolaris (FOSSIL) J.W. Hall 1847 †
Whiteavesia modioliformis (FOSSIL) F.B. Meek & A.H. Worthen †,
Callodonta monilifera (FOSSIL) Isberg, 1934 †
Modiolopsis morierei (FOSSIL) (Tromelin, 1840 †)
Spathella munda (FOSSIL) Whidborne, 1896 †
Colpomya munini (FOSSIL) Liljedahl, 1994 †
Modiomorpha mytiloides (FOSSIL) T.A. Conrad †
Modiolopsis nana (FOSSIL) Ulrich, 1894 †
Arcticlam nanseni (FOSSIL) Marincovich Jr., 1993 †
Orthodesma nasutum (FOSSIL) (J.W. Hall, 1847 †)
Modiolopsis nilssoni (FOSSIL) (Hisinger, 1837 †)
Aristerella nitidula (FOSSIL) Ulrich, 1894 †
Aristerella nitiduloides (FOSSIL) Bekker, 1921 †
Mimerodonta njordi (FOSSIL) Liljedahl, 1994 †
Parallelodus obliquus (FOSSIL) R.M. Branson, 1909 †
Modiolopsis orthoconcavus (FOSSIL) Fisher, 1957 †
Cymatonota orthonotum (FOSSIL) F.B. Meek & A.H. Worthen †,
Modiomorpha ostbjorkae (FOSSIL) Isberg, 1934 †
Modiolopsis ovata (FOSSIL) (T.A. Conrad, 1842 †)
Modiomorpha ovata (FOSSIL) F.B. Meek, 1877 †
Modiolodon oviformis (FOSSIL) (Ulrich, 1894 †)
Modiolopsis oweni (FOSSIL) Ulrich, 1894 †
Cymatonota parallela (FOSSIL) (J.W. Hall, 1847 †)
Modiolopsis parviuscula (FOSSIL) Billings, 1859 †
Modiolodon patulus (FOSSIL) Ulrich, 1894 †
Mimerodonta phaseolus (FOSSIL) Kríž, 2008 †
Pholadomorpha pholadiformis (FOSSIL) (J.W. Hall, 1851 †)
Cymatonota pholadis (FOSSIL) (J.W. Hall, 1847 †)
Modiolopsis pojetai (FOSSIL) Jakobsen & al., 2016 †
Cymatonota postlatum (FOSSIL) (Ulrich, 1894 †)
Modiolopsis postlineata (FOSSIL) McCoy †
Orthodesma postplicatum (FOSSIL) Foerste, 1914 †
Modiolodon poststriatus (FOSSIL) Foerste, 1914 †
Janicula potens (FOSSIL) (Barrande, 1881 †)