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.

GBIF data for Microspongium immersum

WoRMS: Microspongium immersum at World Register of Marine Species. Accepted name: Microspongium immersum (Levring) P.M.Pedersen, 1984. AphiaID: 144974.

Classification: Biota; Chromista; Harosa; Heterokonta; Ochrophyta; Phaeophyceae; Fucophycidae; Ectocarpales; Chordariaceae; Microspongium