| Name | Callithamnion tetricum (Dillwyn) Gray |
| Authorship | (Dillwyn) Gray |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Callithamnion Lyngbye |
| Contains | Callithamnion tetricum var. minus C. Agardh |
| Remarks | Created from Taxon Name Import: Callithamnion tetricum (Dillwyn) Gray |
| Holdings | 20 Specimens held in the Harvard University Herbaria identified as Callithamnion tetricum (Dillwyn) Gray |
| Identification made in | [no date] (20) |