Invalid names: Caenopus premitis Gregory and Cook 1928 [synonym], Trigonias cooki Wood 1931 [synonym], Trigonias hypostylus Gregory and Cook 1928 [synonym], Trigonias paucidens Wood 1927 [synonym], Trigonias precopei Gregory and Cook 1928 [synonym], Trigonias preoccidentalis Gregory and Cook 1928 [synonym], Trigonias taylori Gregory and Cook 1928 [synonym], Trigonias tetradactylum Osborn 1923 [synonym]