Trigonia bronnii Agassiz, 1840 † accepted as Myophorella bronnii (Agassiz, 1840) † accepted as Myophorella clavellata (Parkinson, 1811) † (original description)
Trigonia cardissa Agassiz, 1840 † (original description)
Trigonia carinata Agassiz, 1840 † (original description)
Trigonia caudata Agassiz, 1840 † accepted as Eurotrigonia caudata (Agassiz, 1840) † (original description)
Trigonia cincta Agassiz, 1840 † accepted as Quadratotrigonia cincta (Agassiz, 1840) † (original description)
Trigonia clathrata Agassiz, 1840 † accepted as Myophorella clathrata (Agassiz, 1840) † (original description)
Trigonia concentrica Agassiz, 1840 † (original description)
Trigonia conformis Agassiz, 1840 † (original description)
Trigonia costellata Agassiz, 1840 † (original description)
Trigonia denticulata Agassiz, 1840 † (original description)
Trigonia geographica Agassiz, 1840 † (original description)
Trigonia goldfussii Agassiz, 1840 † (original description)
Trigonia lineolata Agassiz, 1840 † (original description)
Trigonia longa Agassiz, 1840 † accepted as Lycettitrigonia longa (Agassiz, 1840) † (original description)
Trigonia maxima Agassiz, 1840 † (original description)
Trigonia meriani Agassiz, 1840 † accepted as Trigonia reticulata Agassiz, 1840 † (original description)
Trigonia monilifera Agassiz, 1840 † accepted as Trigonia reticulata Agassiz, 1840 † (original description)
Trigonia notata Agassiz, 1840 † (original description)
Trigonia papillata Agassiz, 1840 † accepted as Trigonia reticulata Agassiz, 1840 † (original description)
Trigonia paradoxa Agassiz, 1840 † (original description)
Trigonia parkinsonii Agassiz, 1840 † (original description)
Trigonia parvula Agassiz, 1840 † accepted as Trigonia reticulata Agassiz, 1840 † (original description)
Trigonia perlata Agassiz, 1840 † accepted as Myophorella perlata (Agassiz, 1840) † (original description)
Trigonia picta Agassiz, 1840 † (original description)
Trigonia plicata Agassiz, 1840 † (original description)
Trigonia pulchella Agassiz, 1840 † (original description)
Trigonia quadrata Agassiz, 1840 † accepted as Trigonia deslongchampsii Munier-Chalmas, 1865 † accepted as Neoquadratotrigonia deslongchampsii (Munier-Chalmas, 1865) † (original description)
Trigonia reticulata Agassiz, 1840 † (original description)
Trigonia roemeri Agassiz, 1840 † (original description)
Trigonia rostrum Agassiz, 1840 † (original description)
Trigonia scapha Agassiz, 1840 † accepted as Tamaragonia scapha (Agassiz, 1840) † (original description)
Trigonia signata Agassiz, 1840 † (original description)
Trigonia similis Agassiz, 1840 † (original description)
Trigonia sulcata Agassiz, 1840 † accepted as Trigonia hauterivica Strand, 1928 † (original description)
Trigonia suprajurensis Agassiz, 1840 † (original description)
Trigonia truncata Agassiz, 1840 † (original description)
Trigonia tuberculata Agassiz, 1840 † accepted as Promyophorella tuberculata (Agassiz, 1840) † (original description)
Trigonia voltzii Agassiz, 1840 † (original description)
Trigonia zonata Agassiz, 1840 † (original description)
Trigonia zwingeri Agassiz, 1840 † (original description)