Classification of the genus Trigonarca

G. †Trigonarca Conrad 1862
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Trigonarca angolensis Rennie 1929
Trigonarca californica Packard 1922
Trigonarca camerunensis Riedel 1932
Trigonarca cardiformis von Koenen 1897
Trigonarca curvatodonta Riedel 1932
Trigonarca excavata Packard 1922
Trigonarca furoni Dartevelle and Freneix 1957
Trigonarca jessupae Maury 1930
Trigonarca manzadinensis Dartevelle and Freneix 1957
Trigonarca sectilis Packard 1922
Trigonarca semiglabra von Koenen 1897