Nototrigonia aberrata (FOSSIL) Skwarko, 1963 †
Quadratojaworskiella acarinata (FOSSIL) A.M. Pérez & al., 2008 †
Trigonia aclinisa (FOSSIL) Dickan, 1990 †
Neotrigonia acuticostata (FOSSIL) (McCoy, 1866 †)
Trigonia alemanica (FOSSIL) (Rollier, 1912 †)
Trigonia alsatica (FOSSIL) (Rollier, 1912 †)
Guineana alta (FOSSIL) (W.M. Gabb, 1864 †)
Trigonia andrussovi (FOSSIL) Saveliev, 1960 †
Trigonia angustecostata (FOSSIL) Behrendsen, 1892 †
Trigonia antiqua (FOSSIL) d'Orbigny, 1842 †
Trigonia arduennensis (FOSSIL) (Rollier, 1912 †)
Trigonia areafurcata (FOSSIL) Vetters, 1905 †
Trigonia aylesburiensis (FOSSIL) Cox †
Trigonia bajarunasi (FOSSIL) Saveliev, 1960 †
Actinotrigonia bathurstensis (FOSSIL) Cox, 1964 †
Neotrigonia bednalli (J.C. Verco, 1907)
Psilotrigonia beesleyana (FOSSIL) (Lycett, 1874) †
Trigonia bella (FOSSIL) J. Lycett, 1877 †
Maoritrigonia beringica (FOSSIL) Bychkov, 1985 †
Indotrigonia beyschlagi (FOSSIL) (G. Müller, 1900) †
Vanhoepenella brendae (FOSSIL) M.R. Cooper, 2016 †
Trigonia brevicostata (FOSSIL) Kitchin, 1903 †
Trigonia buckmani (FOSSIL) Cox. †
Jaworskiella burckhardti (FOSSIL) (Jaworski, 1916 †)
Heslingtonia campbellorum (FOSSIL) Fleming 1987 †
Psilotrigonia canadensis (FOSSIL) Poulton 1976 †
Eselaevitrigonia cardiniiformis (FOSSIL) (Kitchin, 1903 †)
Trigonia carinata (FOSSIL) A.E.R. Agassiz, 1840 †
Trigonia cassiope (FOSSIL) Lycett ex d'Orbigny †
Trigonia castani (FOSSIL) Henry, 1876 †
Trigonia castrovillensis (FOSSIL) L.W. Stephenson, 1941 †
Trigonia charlockensis (FOSSIL) Kellaway & Wilson †
Maoritrigonia chekhovi (FOSSIL) Bychkov, 1985 †
Malagasitrigonia collignoni (FOSSIL) (L.R. Cox, 1964 †)
Maoritrigonia columbiana (FOSSIL) (McLearn, 1942 †)