RHODOPHYTA : Ceramiales : CallithamniaceaeRED ALGAE

Aglaothamnion roseum (Roth) Maggs et L'Hardy-Halos


Description: Thallus filamentous, erect and finely branched to 7 cms long with corticating rhizoidal filaments near the base on the main axis.

Habitat: Common. Epiphytic, epizoic and epilithic from the low littoral to 20 m sublittoral.

Distribution: Records scattered around the coasts of the British Isles from the Shetlands to the Channel Islands. Europe: Portugal, Spain, Netherlands and Norway.

Similar Species: All species of Aglaothamnion and Callithamnion are similar and not easy to identify.

Distribution Map from NBN: Aglaothamnion roseum at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Aglaothamnion roseum at iNaturalist World Species Observations database.

WoRMS: Aglaothamnion roseum at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Aglaothamnion roseum. (Roth) Maggs et L'Hardy-Halos. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZM7980. Accessed on 2026-11-01