• Thomsonia Ancey, 1886 (uncertain) [Family: Mollusca (awaiting allocation), Phylum: Mollusca]
• Thomsonia Jackson, 1916 † accepted as Coptothyris Jackson, 1918 [Family: Laqueidae, Phylum: Brachiopoda]
• Thomsonia K. Mädler, 1954 † accepted as Paxillitriletes J.W. Hall & D.H. Nicolson, 1973 † [Family: , Phylum: Sporae dispersae]
• Thomsonia Konow, 1884 (uncertain) [Family: Hymenoptera (awaiting allocation), Phylum: Arthropoda]
• Thomsonia Signoret, 1879 accepted as Hecalus Stål, 1864 [Family: Cicadellidae, Phylum: Arthropoda]
• Thomsonia Wallich, 1830 accepted as Amorphophallus Blume ex Decaisne, 1834 [Family: Araceae, Phylum: Tracheophyta]
• Thomsonia hookeri (Schott) Engl. accepted as Amorphophallus napalensis (Wall.) Bogner & Mayo
• Thomsonia larsenii S.Y. Hu accepted as Amorphophallus brevispathus Gagnep.
• Thomsonia napalensis Wall. accepted as Amorphophallus napalensis (Wall.) Bogner & Mayo
• Thomsonia sumawongii Bogner accepted as Amorphophallus sumawongii (Bogner) Bogner & Mayo
• Thomsonia sutepensis S.Y. Hu accepted as Amorphophallus corrugatus N.E. Br.
• Thomsonia thaiensis S.Y. Hu accepted as Amorphophallus yunnanensis Engl.