RHODOPHYTA : Ceramiales : CallithamniaceaeRED ALGAE

Aglaothamnion diaphanum L'Hardy-Halos et Maggs


Description: Thallus filamentous, erect to 1 cm long, branching in one plane.

Habitat: Very rare. Usually epiphytic in the sublittoral to 25 m depth.

Distribution: Known in the British Isles only from counties Cornwall, Donegal and Kerry.

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

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

iNaturalist: Aglaothamnion diaphanum at iNaturalist World Species Observations database.

WoRMS: Aglaothamnion diaphanum at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Aglaothamnion diaphanum. L'Hardy-Halos et Maggs. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZM7901. Accessed on 2026-11-01