| Nominal Species (n = 5) | Present allocation (n = 5) | Ref. |
|---|---|---|
| Guynia annulata Duncan, 1872 | Guynia annulata | 19 |
| Schizocyathus fissilis Pourtalès, 1874 | Schizocyathus fissilis | 19 |
| Truncatoguynia irregularis Cairns, 1989 | Truncatoguynia irregularis | 19 |
| Temnotrochus kermadecensis Cairns, 1995 | Temnotrochus kermadecensis | 19 |
| Pedicellocyathus keyesi Cairns, 1995 | Pedicellocyathus keyesi | 19 |