Description: Thallus epiphytic forming very small gelatinous tufts up to 0.5 mm high and 2 - 3 mm across. Central region consisting of erect filaments up to 6 cells long.

Habitat: Very rare. Epiphytic on Scytosiphon lomentaria in the littoral.

Distribution: Few records from scattered sites in the British Isles. Europe: Denmark, Baltic Sea, Sweden and Norway.

Similar Species: There are a many similar small algae - microscopic examination is required to identify.

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

iNaturalist: Myriactula haydenii at iNaturalist World Species Observations database.

GBIF data for Myriactula haydenii

WoRMS: Myriactula haydenii at World Register of Marine Species. Accepted name: Myriactula haydenii (Gatty) Levring, 1937. AphiaID: 144964.

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