| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Hydrolithon pachydermum | (Foslie) J.C.Bailey, J.E.Gabel, & D.W.Freshwater, 2004 | accepted name | Yes | senior synonym |
new combination |
| Porolithon pachydermum | (Foslie) Foslie, 1909 | synonym | No | senior synonym |
new combination |