Iotrigonia curta Bogdanova & Yanin, 2004 † (basis of record)
Iotrigonia elekansuensis Yanin & Bogdanova, 2017 † (original description)
Linotrigonia kudryavzevi Yanin, 2004 † (basis of record)
Linotrigonia plana Yanin, 2004 † (basis of record)
Litschkovitrigonia inguschensis (Renngarten, 1926) † accepted as Saveligonia inguschensis (Renngarten, 1926) † (basis of record)
Litschkovitrigonia multituberculata (Litschkov, 1912) † (basis of record)
Litschkovitrigonia ovata (Litschkov, 1912) † (basis of record)
Litschkovitrigonia subdaedalea (Renngarten, 1926) † accepted as Saveligonia subdaedalea (Renngarten, 1926) † (basis of record)
Myophorella (Orthotrigonia) mordvilkoae Yanin, 1979 † accepted as Orthotrigonia mordvilkoae (Yanin, 1979) † (basis of record)
Myophorella ardonensis Yanin & Bogdanova, 2017 † (original description)
Myophorella invittulina Saveliev, 1958 † accepted as Myophorella loewinsonlessingi (Renngarten, 1926) † (basis of record)
Myophorella loewinsonlessingi (Renngarten, 1926) † (basis of record)
Orthotrigonia mordvilkoae (Yanin, 1979) † (basis of record)
Quadratotrigonia baksanensis Yanin & Bogdanova, 2017 † (original description)
Quadratotrigonia nodosa (J. De C. Sowerby, 1826) † (basis of record)
Trigonia abichi var. renngarteni Mordvilko, 1947 † (basis of record)
Trigonia baksanensis Mordvilko, 1960 † (basis of record)
Trigonia carinata argentinica Saveliev, 1958 † accepted as Trigonia carinata Agassiz, 1840 † (basis of record)
Trigonia carinata crimica Yanin, 2004 † accepted as Trigonia carinata Agassiz, 1840 † (basis of record)
Trigonia curta Mordvilko, 1956 † (basis of record)
Trigonia gerassimovi Mordvilko, 1937 † (basis of record)
Trigonia gertrudae Mordvilko † (basis of record)
Trigonia harpa Leymerie, 1842 † accepted as Trigonia carinata Agassiz, 1840 † (basis of record)
Trigonia inguschensis Renngarten, 1926 † accepted as Saveligonia inguschensis (Renngarten, 1926) † (additional source)
Trigonia kabardinensis Mordvilko, 1937 † (basis of record)
Trigonia lidiae Mordvilko † (basis of record)
Trigonia loewinsonlessingi Renngarten, 1926 † accepted as Myophorella loewinsonlessingi (Renngarten, 1926) † (basis of record)
Trigonia naltschikensis Mordvilko, 1949 † accepted as Tamaragonia naltschikensis (Mordvilko, 1949) † (basis of record)
Trigonia narzanensis Mordvilko, 1960 † (basis of record)
Trigonia nikschitschi Mordvilko † (basis of record)
Trigonia nodosa J. De C. Sowerby, 1826 † accepted as Quadratotrigonia nodosa (J. De C. Sowerby, 1826) † (basis of record)
Trigonia nodosa var. karakaschi Mordvilko, 1932 † accepted as Quadratotrigonia karakaschi (Mordvilko, 1932) † (additional source)
Trigonia nodosa var. orbignyana Lycett, 1875 † accepted as Quadratotrigonia orbignyana (Lycett, 1875) † (additional source)
Trigonia nodosa var. suborbignyana Mordvilko † (basis of record)
Trigonia nodosa var. wollemanni Mordvilko, 1962 † (basis of record)
Trigonia oblonga Yanin & Bogdanova, 2017 † (original description)
Trigonia ornata var. lycetti Mordvilko † (basis of record)
Trigonia ornata var. subwoodsi Mordvilko † (basis of record)
Trigonia ornata var. woodsi Mordvilko, 1956 † (basis of record)
Trigonia subdaedalea Renngarten, 1926 † accepted as Saveligonia subdaedalea (Renngarten, 1926) † (additional source)
Trigonia subdaedalea var. curta Mordvilko † (basis of record)
Trigonia subdaedalea var. daghestanensis Mordvilko, 1962 † (basis of record)
Trigonia subetheridgei Mordvilko, 1956 † (basis of record)
Trigonia subinguschensis Mordvilko, 1960 † (basis of record)
Trigonia subkudakhurtensis Mordvilko † (basis of record)
Trigonia subnaltschikensis Mordvilko, 1960 † (basis of record)
Trigonia subnodosa Mordvilko, 1952 † (basis of record)
Trigonia tepsichensis Mordvilko, 1937 † (basis of record)
Trigonia tepsikhaensis Mordvilko, 1960 † (basis of record)
Trigonia tunsaensis Mordvilko † (basis of record)
Trigonia zmurkensis Mordvilko, 1956 † (basis of record)

 Nomenclature

 for Iotrigonia curta Bogdanova & Yanin, 2004 †

Trigonia curta Mordvilko, 1956 is a nomen nudum [details]

 Nomenclature

 for Quadratotrigonia baksanensis Yanin & Bogdanova, 2017 †

name not available from Mordvilko (1960): nomen nudum [details]