| Kingdom | Phylum | Class | Order | Family | Genus |
|---|---|---|---|---|---|
| Plantae | Rhodophyta | Florideophyceae | Ceramiales | Callithamniaceae | Callithamnion Lyngbye, 1819 |
Callithamnion gracillimum C.Agardh. GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via biodiversity.aq on 2021-09-09.