CHROMOPHYTA : Ectocarpales : AcinetosporaceaeBROWN ALGAE

Feldmannia irregularis (Kützing) G Hamel


Description: Tufts of monosiphonous erect filaments to 30 mm long with difuse branching.

Habitat: Rare. Epiphytic on Fucus and other algae.

Distribution: Recorded from a few scattered sites in Britain. Europe: Portugal, Spain, France, Netherlands, Norway and Spitzbergen. Atlantic coast of North America: Canada. Furrther afield: Jamaica, the Canary Islands, South Africa and California.

Similar Species: Many fine filamentous brown algae are similar and require microscopic examination for identification.

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

iNaturalist: Feldmannia irregularis at iNaturalist World Species Observations database.

WoRMS: Feldmannia irregularis at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Feldmannia irregularis. (Kützing) G Hamel. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZR440. Accessed on 2026-11-01