Andivaugonia H. A. Leanza, 1993 † (basis of record)
Andivaugonia radixscripta (Lambert, 1944) † (basis of record)
Grandigonia M. R. Cooper, 2015 † (original description)
Grandigonia robinaldina (A. d'Orbigny, 1844) † (basis of record)
Iotrigonia glyptica (H. Woods, 1917) † (basis of record)
Iotrigonia inconstans van Hoepen, 1929 † accepted as Zaletrigonia inconstans (van Hoepen, 1929) † (basis of record)
Iotrigonia leda C. A. Fleming, 1987 † (basis of record)
Iotrigonia lenseni C. A. Fleming, 1987 † (basis of record)
Iotrigonia limatula Whitehouse, 1947 † (basis of record)
Iotrigonia nanutarraensis (L. R. Cox, 1961) † (basis of record)
Iotrigonia rolli (Piatnitzky, 1938) † (basis of record)
Iotrigonia stowi (Kitchin, 1908) † (basis of record)
Iotrigonia vscripta (Kitchin, 1903) † (basis of record)
Iotrigoniidae Saveliev, 1958 † (additional source)
Levytrigonia M. R. Cooper, 2015 † (original description)
Levytrigonia covuncoensis (Lambert, 1944) † (new combination reference)
Mayesella M. R. Cooper, 2015 † (original description)
Mayesella dubia (Kitchin, 1903) † (basis of record)
Mayesella falcki (Rouillier & Vosinsky, 1849) † (basis of record)
Mayesella heterosculpta (Stanton, 1901) † (basis of record)
Mayesella jakshysaurensis (Luppov, 1932) † (basis of record)
Mayesella kuehni (G. Müller, 1900) † (basis of record)
Mayesella recurva (Kitchin, 1903) † (basis of record)
Mayesella vau (Sharpe, 1856) † (basis of record)
Pacitrigonia nanutarraensis L. R. Cox, 1961 † accepted as Iotrigonia nanutarraensis (L. R. Cox, 1961) † (basis of record)
Perezella M. R. Cooper, 2015 † accepted as Perezigonia Ceccolini & Cianferoni, 2021 † (original description)
Perezella fuenzalidai (Reyes & E. Pérez, 1984) † accepted as Perezigonia fuenzalidai (Reyes & E. Pérez, 1984) † (basis of record)
Perezella lissocostata (Reyes & E. Pérez, 1984) † accepted as Perezigonia lissocostata (Reyes & E. Pérez, 1984) † (basis of record)
Tamaragonia M. R. Cooper, 2015 † (original description)
Tamaragonia abichi (Anthula, 1899) † (basis of record)
Tamaragonia hauchecornei (M. Schmidt, 1905) † (basis of record)
Tamaragonia naltschikensis (Mordvilko, 1949) † (basis of record)
Tamaragonia scapha (Agassiz, 1840) † (basis of record)
Tamaragonia seguenzai (Trevisan, 1937) † (basis of record)
Trigonia (Iotrigonia) haughtoni Rennie, 1936 † accepted as Mayesella haughtoni (Rennie, 1936) † (basis of record)
Trigonia abichi Anthula, 1899 † accepted as Tamaragonia abichi (Anthula, 1899) † (basis of record)
Trigonia covuncoensis Lambert, 1944 † accepted as Levytrigonia covuncoensis (Lambert, 1944) † (basis of record)
Trigonia dubia Kitchin, 1903 † accepted as Mayesella dubia (Kitchin, 1903) † (basis of record)
Trigonia hauchecornei M. Schmidt, 1905 † accepted as Tamaragonia hauchecornei (M. Schmidt, 1905) † (basis of record)
Trigonia heterosculpta Stanton, 1901 † accepted as Mayesella heterosculpta (Stanton, 1901) † (basis of record)
Trigonia jakshysaurensis Luppov, 1932 † accepted as Mayesella jakshysaurensis (Luppov, 1932) † (basis of record)
Trigonia kuehni G. Müller, 1900 † accepted as Mayesella kuehni (G. Müller, 1900) † (basis of record)
Trigonia radixscripta Lambert, 1944 † accepted as Andivaugonia radixscripta (Lambert, 1944) † (basis of record)
Trigonia recurva Kitchin, 1903 † accepted as Mayesella recurva (Kitchin, 1903) † (basis of record)
Trigonia robinaldina A. d'Orbigny, 1844 † accepted as Grandigonia robinaldina (A. d'Orbigny, 1844) † (basis of record)
Trigonia scapha Agassiz, 1840 † accepted as Tamaragonia scapha (Agassiz, 1840) † (basis of record)
Trigonia seguenzai Trevisan, 1937 † accepted as Tamaragonia seguenzai (Trevisan, 1937) † (basis of record)
Trigonia stowi Kitchin, 1908 † accepted as Iotrigonia stowi (Kitchin, 1908) † (basis of record)
Trigonia vau Sharpe, 1856 † accepted as Mayesella vau (Sharpe, 1856) † (basis of record)
Trigonia vscripta Kitchin, 1903 † accepted as Iotrigonia vscripta (Kitchin, 1903) † (basis of record)
Vaugonia (Vaugonia) fuenzalidai Reyes & E. Pérez, 1984 † accepted as Perezella fuenzalidai (Reyes & E. Pérez, 1984) † accepted as Perezigonia fuenzalidai (Reyes & E. Pérez, 1984) † (basis of record)
Vaugonia (Vaugonia) lissocostata Reyes & E. Pérez, 1984 † accepted as Perezella lissocostata (Reyes & E. Pérez, 1984) † accepted as Perezigonia lissocostata (Reyes & E. Pérez, 1984) † (basis of record)
Zaletrigonia Skwarko, 1963 † (basis of record)
Zaletrigonia inconstans (van Hoepen, 1929) † (basis of record)