| RHODOPHYTA : Ceramiales : Callithamniaceae | RED ALGAE |
Description: Thallus uniseriate, erect to 11 cms long. Rhizoidal filaments grow down forming cortication.
Habitat: Epiphytic in the lower littoral to 15 m.
Distribution: Common and generally distributed around the British Isles from the Shetlands to the Channel Islands. Europe: the Azores, Portugal, Spain, France, the Baltic and Iceland. Atlantic coast of North America: Canada, Maine, New Hampshire, Massachusetts, Rhode Island, Connecticut, New Jersey and Virginia. Further afield: Canary Islands.
Similar Species: All species of Callithamnion and Aglaothamnion are similar.
Distribution Map from NBN: Callithamnion tetragonum at National Biodiversity Network mapping facility, data for UK.
iNaturalist: Callithamnion tetragonum at iNaturalist World Species Observations database.
WoRMS: Callithamnion tetragonum at World Register of Marine Species.
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| Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Callithamnion tetragonum. (Withering) S F Gray. [In] Encyclopedia of Marine Life of Britain and Ireland. https://habitas.org/mbdp/species.php?item=ZM8010. Accessed on 2026-11-01 |