| Senior homonym (allowed) | : | Castalia (Genus) Savigny, 1822, nom. illeg. | |
Ref: S.J. Brands (comp.), 1989-present: 27 Sep 2013. |
| Senior homonym (allowed) | : | Castalia (Genus) Salisb. (1805), nom. illeg. | |
Ref: S.J. Brands (comp.), 1989-present: 9 Aug 2021. |
| Senior homonym (allowed) | : | Castalia (Genus) Lamarck, 1819 | |
Ref: S.J. Brands (comp.), 1989-present: 27 Sep 2013. |