Charigonia M. R. Cooper, 2024 † (original description)
Charigonia exortiva (Kitchin, 1903) † (basis of record)
Charigonia gracilis (Kitchin, 1903) † (basis of record)
Charigonia hispida (Kitchin, 1903) † (basis of record)
Charigonia jumarensis (Kitchin, 1903) † (basis of record)
Charigonia kutchensis (Kitchin, 1903) † (basis of record)
Charigonia quennelli (L. R. Cox, 1965) † (basis of record)
Myophorella griesbachi (Lycett, 1872) † accepted as Orthotrigonia griesbachi (Lycett, 1872) † (source of synonymy)
Myophorella spinifera (A. d'Orbigny, 1850) † accepted as Orthotrigonia spinifera (A. d'Orbigny, 1850) † (source of synonymy)
Neustriella M. R. Cooper, 2024 † (original description)
Neustriella moutierensis (Lycett, 1872) † (basis of record)
Niranohamella M. R. Cooper, 2024 † (original description)
Niranohamella corrugata (T. Kobayashi & Mori, 1955) † (basis of record)
Niranohamella midareta (T. Kobayashi & Mori, 1955) † (basis of record)
Niranohamella sohli (Poulton, 1979) † (basis of record)
Niranohamella somensis (T. Kobayashi & Tamura, 1957) † (basis of record)
Orthotrigonia L. R. Cox, 1952 † (taxonomy source)
Orthotrigonia aculeata (A. d'Orbigny, 1850) † (basis of record)
Orthotrigonia bathonica (Lycett, 1863) † (basis of record)
Orthotrigonia baylei (Dollfus, 1862) † (basis of record)
Orthotrigonia bergeroni (Bigot, 1893) † (basis of record)
Orthotrigonia clavulosa (Rigaux & Sauvage, 1868) † (basis of record)
Orthotrigonia comberjonensis (Strand, 1928) † (basis of record)
Orthotrigonia corrugata T. Kobayashi & Mori, 1955 † accepted as Niranohamella corrugata (T. Kobayashi & Mori, 1955) † (basis of record)
Orthotrigonia duplicata (J. Sowerby, 1819) † (basis of record)
Orthotrigonia exortiva (Kitchin, 1903) † accepted as Charigonia exortiva (Kitchin, 1903) † (source of synonymy)
Orthotrigonia gemmata (Lycett, 1853) † (basis of record)
Orthotrigonia gracilis (Kitchin, 1903) † accepted as Charigonia gracilis (Kitchin, 1903) † (source of synonymy)
Orthotrigonia griesbachi (Lycett, 1872) † (basis of record)
Orthotrigonia hispida (Kitchin, 1903) † accepted as Charigonia hispida (Kitchin, 1903) † (source of synonymy)
Orthotrigonia ivantischini (Kuljinskaja-Voronetz, 1936) † (basis of record)
Orthotrigonia kutchensis (Kitchin, 1903) † accepted as Charigonia kutchensis (Kitchin, 1903) † (source of synonymy)
Orthotrigonia midareta T. Kobayashi & Mori, 1955 † accepted as Niranohamella midareta (T. Kobayashi & Mori, 1955) † (basis of record)
Orthotrigonia proserpina (A. d'Orbigny, 1850) † (basis of record)
Orthotrigonia recticosta (Lycett, 1872) † (basis of record)
Orthotrigonia schkotoviensis M. R. Cooper, 2024 † (original description (unavailable nomenclaturally))
Orthotrigonia snaintonensis (Lycett, 1877) † (basis of record)
Orthotrigonia sohli Poulton, 1979 † accepted as Niranohamella sohli (Poulton, 1979) † (basis of record)
Orthotrigonia spiculifera (J.-C. Fischer, 1969) † (basis of record)
Orthotrigonia spinifera (A. d'Orbigny, 1850) † (basis of record)
Orthotrigoniinae M. R. Cooper, 2024 † (original description)
Scaphotrigonia somensis T. Kobayashi & Tamura, 1957 † accepted as Niranohamella somensis (T. Kobayashi & Tamura, 1957) † (basis of record)
Tauricagonia M. R. Cooper, 2024 † (original description)
Trigonia aculeata A. d'Orbigny, 1850 † accepted as Orthotrigonia aculeata (A. d'Orbigny, 1850) † (basis of record)
Trigonia ascoldiensis var. schkotoviensis Kuljinskaja-Voronetz, 1936 † accepted as Orthotrigonia schkotoviensis M. R. Cooper, 2024 † (basis of record)
Trigonia bathonica Lycett, 1863 † accepted as Orthotrigonia bathonica (Lycett, 1863) † (basis of record)
Trigonia bergeroni Bigot, 1893 † accepted as Orthotrigonia bergeroni (Bigot, 1893) † (basis of record)
Trigonia bifera Lycett, 1879 † accepted as Orthotrigonia bifera (Lycett, 1879) † (basis of record)
Trigonia clavulosa Rigaux & Sauvage, 1868 † accepted as Orthotrigonia clavulosa (Rigaux & Sauvage, 1868) † (basis of record)
Trigonia comberjonensis Strand, 1928 † accepted as Orthotrigonia comberjonensis (Strand, 1928) † (basis of record)
Trigonia exortiva Kitchin, 1903 † accepted as Charigonia exortiva (Kitchin, 1903) † (basis of record)
Trigonia gemmata Lycett, 1853 † accepted as Orthotrigonia gemmata (Lycett, 1853) † (basis of record)
Trigonia gemmata var. bifera Lycett, 1879 † accepted as Orthotrigonia bifera (Lycett, 1879) † (basis of record)
Trigonia gracilis Kitchin, 1903 † accepted as Charigonia gracilis (Kitchin, 1903) † (basis of record)
Trigonia griesbachi Lycett, 1872 † accepted as Orthotrigonia griesbachi (Lycett, 1872) † (basis of record)
Trigonia hispida Kitchin, 1903 † accepted as Charigonia hispida (Kitchin, 1903) † (source of synonymy)
Trigonia ivantischini Kuljinskaja-Voronetz, 1936 † accepted as Orthotrigonia ivantischini (Kuljinskaja-Voronetz, 1936) † (basis of record)
Trigonia jumarensis Kitchin, 1903 † accepted as Charigonia jumarensis (Kitchin, 1903) † (basis of record)
Trigonia kutchensis Kitchin, 1903 † accepted as Charigonia kutchensis (Kitchin, 1903) † (basis of record)
Trigonia moutierensis Lycett, 1872 † accepted as Neustriella moutierensis (Lycett, 1872) † (basis of record)
Trigonia proserpina A. d'Orbigny, 1850 † accepted as Orthotrigonia proserpina (A. d'Orbigny, 1850) † (basis of record)
Trigonia snaintonensis Lycett, 1877 † accepted as Orthotrigonia snaintonensis (Lycett, 1877) † (basis of record)
Trigonia spinifera A. d'Orbigny, 1850 † accepted as Orthotrigonia spinifera (A. d'Orbigny, 1850) † (basis of record)