| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Capulus nutatus | Hedley, 1908 | synonym | No | senior synonym |
original combination |
| Roya kermadecensis | Iredale, 1912 | synonym | No | junior synonym |
original combination |
| Roya nutatus | (Hedley, 1908) | synonym | No | senior synonym |
new combination |
| Williamia polynesica | Rehder, 1980 | synonym | No | junior synonym |
original combination |
| Williamia radiata | (Pease, 1861) | accepted name | Yes | senior synonym |
new combination |
| Williamia radiata nutata | (Hedley, 1908) | accepted name | No | senior synonym |
new combination |