| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Lithothamnium calcareum | 12533 | | | ITIS | not accepted | synonym of Phymatolithon calcareum | Species |
| Lithothamnium lenormandii | 12531 | | | ITIS | not accepted | synonym of Phymatolithon lenormandii | Species |
| Lithothamnium polymorphum | 12535 | | | ITIS | not accepted | synonym of Phymatolithon polymorphum | Species |
| Millepora polymorpha | 183136 | Linnaeus | | ITIS | not accepted | synonym of Phymatolithon polymorphum | Species |
| Phymatolithon calcareum | 12532 | | | ITIS | accepted | | Species |
| Phymatolithon lenormandii | 12530 | | | ITIS | accepted | | Species |
| Phymatolithon polymorphum | 12534 | (Linnaeus) Foslie | | ITIS | accepted | | Species |
