Description: Thallus very small forming gelatinous tufts up to 1 mm high and 2 mm across. Central region consisting of erect filaments up to 31 cells long.

Habitat: Epiphytic mainly on Cystoseira spp and Sargassum.

Distribution: Distribution generally on south-western coasts of the British Isles. Europe: Mediterranean and the Black Sea, Spain, France, Netherlands, Denmark and Norway.

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

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

iNaturalist: Myriactula rivulariae at iNaturalist World Species Observations database.

WoRMS: Myriactula rivulariae at World Register of Marine Species. Accepted name: Myriactula rivulariae (Suhr ex Areschoug) Feldmann, 1937. AphiaID: 144967.

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