Euodia semicircularis (Brightwell) Hustedt in Schmidt et al., 1940 accepted as
Triceratium semicirculare var. semicirculare Brightwell, 1853 (new combination reference)
Euodia udiensis Hustedt ex Simonsen, 1987 (original description)
Hemidiscus cuneiformis f. curvirotunda (Tempère & Brun in Brun & Tempère) Hustedt in Schmidt et al., 1940 accepted as
Euodia inornata var. curvirotunda Tempère & Brun in Brun & Tempère, 1889 (new combination reference)
Hemidiscus cuneiformis f. gibba (J.W. Bailey ms., Ralfs in Pritchard) Hustedt, 1940 accepted as
Euodia gibba var. gibba J.W. Bailey, Ralfs in Pritchard, 1861 (new combination reference)
Hemidiscus cuneiformis f. orbicularis (Castracane) Hustedt in Schmidt et al., 1940 accepted as
Euodia orbicularis Castracane, 1886 (new combination reference)
Hemidiscus cuneiformis f. recta (Castracane) Hustedt in Schmidt et al., 1940 accepted as
Euodia recta Castracane, 1886 (new combination reference)
Hemidiscus cuneiformis f. ventricosa (Castracane) Hustedt in Schmidt et al., 1940 accepted as
Euodia ventricosa Castracane, 1886 (new combination reference)
Hemidiscus rotundus f. gibbosa Hustedt in Schmidt et al., 1940 (original description)
Keratophora granulata (Chenevière) Hustedt in Schmidt et al., 1940 accepted as
Kittonia granulata Chenevière, 1934 † (new combination reference)
Pseudauliscus udiensis Debes ex Hustedt in Schmidt et al., 1940 (original description)
Stictocyclus appendiculatus (Grunow in Van Heurck) Hustedt in Schmidt et al., 1940 accepted as
Stictodiscus appendiculatus Grunow in Van Heurck, 1883 (new combination reference)
Stictodiscus buryanus f. gracilis (Truan & Witt) Hustedt in Schmidt et al., 1940 accepted as
Stictodiscus buryanus var. gracilis Truan y Luard & Witt, 1888 (new combination reference)
Stictodiscus californicus f. concentrica Hustedt in Schmidt et al., 1940 (original description)
Stictodiscus compar Hustedt in Schmidt et al., 1940 (original description)
Stictodiscus gibbosus (Grove & Sturt) Hustedt, 1940 † accepted as
Stictodiscus parallelus var. gibbosa Grove & Sturt, 1887 (new combination reference)
Stictodiscus hardmanianus f. subquadrata Hustedt in Schmidt et al., 1940 (original description)
Stictodiscus johnsonianus f. jeremianus (Schmidt in Schmidt et al.) Hustedt in Schmidt et al., 1940 accepted as
Triceratium jeremianum Schmidt in Schmidt et al., 1882 (new combination reference)
Stictodiscus similis Hustedt in Schmidt et al., 1940 (original description)
Stictodiscus truani f. trigona Hustedt in Schmidt et al., 1940 (original description)