RHODOPHYTA : Colaconematales : ColaconemataceaeRED ALGAE

Colaconema nemalionis (De Notaris ex L.Dufour) Stegenga, 1985


Description: Very small uniseriate filaments of profusely branched prostrate endophytic axes and erect tufted axes to 5 mm.

Habitat: Rare. Epiphyte on Nemalion helminthoides, midlittoral.

Distribution: British Isles: the Shetlands and the Isle of Man. Europe: Mediterranean, Baltic Sea and Denmark. Further afield: Canary Islands and Bermuda.

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

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

iNaturalist: Colaconema nemalionis at iNaturalist World Species Observations database.

WoRMS: Colaconema nemalionis at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Colaconema nemalionis. (De Notaris ex L.Dufour) Stegenga, 1985. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZM1320. Accessed on 2026-11-01