RHODOPHYTA : Acrochaetiales : AcrochaetiaceaeRED ALGAE

Acrochaetium scapae (Lyle) Papenfuss, 1945


Description: Very small prostrate axes growing on a Cladophora, each axis of no more than 3-5 cells, occasionally branched.

Habitat: Very rare. Epiphytic on Cladophora, sublittoral to 4 m.

Distribution: Known only from Scapa Flow, Orkney in the British Isles.

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

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

iNaturalist: Acrochaetium scapae at iNaturalist World Species Observations database.

WoRMS: Acrochaetium scapae at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Acrochaetium scapae. (Lyle) Papenfuss, 1945. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZM1410. Accessed on 2026-11-01