Classification of the genus Pterotrigonia

G. †Pterotrigonia van Hoepen 1929
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Subg. †Pterotrigonia (Acanthotrigonia) van Hoepen 1929
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Acanthotrigonia shepstonei Griesbach 1871
Pterotrigonia (Acanthotrigonia) higoensis Tamura and Tashiro 1967
Subg. †Pterotrigonia (Pterotrigonia) van Hoepen 1929
Subg. †Pterotrigonia (Ptilotrigonia) van Hoepen 1929
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Pterotrigonia (Ptilotrigonia) mifunensis Tamura and Tashiro 1967
Ptilotrigonia lauta van Hoepen 1929
Subg. †Pterotrigonia (Rinetrigonia) van Hoepen 1929
Pterotrigonia borgesi Rennie 1945
Pterotrigonia crenulata Lamarck 1819
Pterotrigonia cristata van Hoepen 1929
Pterotrigonia ethra Coquand 1880
Pterotrigonia klamathonia Anderson 1958
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Invalid names: Lyrodon aliforme Goldfuss 1837 [synonym], Trigonia limbata Orbigny 1844 [synonym]
Trigonia evansana oregana Packard 1921
Invalid names: Notoscabrotrigonia Dietrich 1933 [synonym], Pisotrigonia van Hoepen 1929 [synonym], Rinetrigonia van Hoepen 1929 [synonym]