| Nominal Species (n = 15) | Present allocation (n = 7) | Ref. |
|---|---|---|
| Metridium canum Stuckey, 1914 | Metridium canum | 3477 |
| Metridium dianthus (Ellis, 1768) | Metridium dianthus | 131333 |
| Metridium exilis Hand, 1956 | Metridium exilis | 19 |
| Actinia farcimen Brandt, 1835 | Metridium farcimen | 19 |
| Actinia fenilis Linnaeus | Metridium senile | 19 |
| Metridium giganteum Fautin, Bucklin & Hand, 1989 | Metridium farcimen | 19 |
| Actinia pallida Holdsworth, 1855 | Metridium senile | 19 |
| Sagartia pallida Holdsworth | Metridium senile | 19 |
| Metridium parvulum McMurrich, 1904 | Metridium parvulum | 19 |
| Paraisometridium pehuensis Zamponi, 1978 | Paraisometridium pehuensis | 19 |
| Actinia priapus Tilesius, 1809 | Metridium farcimen | 19 |
| Dendractis priapus Tilesius, 1809 | Metridium farcimen | 19 |
| Isometridium rickettsi Carlgren, 1949 | Metridium farcimen | 19 |
| Actinia senilis Linnaeus | Metridium senile | 19 |
| Priapus senilis Linnaeus, 1761 | Metridium senile | 19 |