RHODOPHYTA : Acrochaetiales : AcrochaetiaceaeRED ALGAE

Acrochaetium sanctae-mariae (Darbishire) Hamel, 1927


Description: Microscopic uniseriate filaments, unbranched, living entirely within the host species.

Habitat: Very rare. Growing endophytically in Himanthalia elongata.

Distribution: Known only from St Mary's Island, Whitbay, Northumberland, NE England and Garheugh Port, North Solway, SW Scotland.

Similar Species: All species of Acrochaetium are similar, microscopic examination is required for identification.

Distribution Map from NBN: Acrochaetium sanctae-mariae at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Acrochaetium sanctae-mariae at iNaturalist World Species Observations database.

WoRMS: Acrochaetium sanctae-mariae at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Acrochaetium sanctae-mariae. (Darbishire) Hamel, 1927. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZM1390. Accessed on 2026-11-01