CHROMOPHYTA : Ectocarpales : ChordariaceaeBROWN ALGAE

Microspongium immersum (Levring) P Pedersen


Description: Minute profusely branched endophyte.

Habitat: Endophyte in Harveyella mirabilis and parasitic in Rhodomela confervoides.

Distribution: Known in the British Isles only from the Isle of Man. Europe: Norway. Atlantic coast of North America: Canada.

Similar Species: There are a number of similar species growing as epiphytes or endophytes - all difficult to identify.

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

iNaturalist: Microspongium immersum at iNaturalist World Species Observations database.

WoRMS: Microspongium immersum at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Microspongium immersum. (Levring) P Pedersen. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZR2170. Accessed on 2026-11-01