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
†Pterotrigonia (Acanthotrigonia) mashikensis 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
Subg. †Pterotrigonia (Scabrotrigonia) Dietrich 1933
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†Pterotrigonia (Scabrotrigonia) monobeana Tashiro and Kozai 1982
†Pterotrigonia (Scabrotrigonia) pustulosa Nagao 1930
†Pterotrigonia (Scabrotrigonia) scabra Lamarck 1819
†Pterotrigonia (Scabrotrigonia) thoracica Morton 1834
†Pterotrigonia (Scabrotrigonia) eufaulensis Gabb 1860
†Pterotrigonia borgesi Rennie 1945
†Pterotrigonia crenulata Lamarck 1819
†Pterotrigonia cristata van Hoepen 1929
†Pterotrigonia ethra Coquand 1880
†Pterotrigonia evansana Meek 1864
†Pterotrigonia klamathonia Anderson 1958
†Pterotrigonia vaelsiensis Boehm 1884
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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]