| Name | Callithamnion microscopicum Nägeli ex Kützing | 
| Authorship | Nägeli ex Kützing | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Callithamnion Lyngbye | 
| GUID | urn:lsid:marinespecies.org:taxname:496749 | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Callithamnion microscopicum Nägeli ex Kützing | 
| Identification made in | [no date] (1) | 
