Description: Thallus monosiphonous and erect to 1.5 cms. Branchlets paired and very delicate.

Habitat: Rare. Epilithic in the sublittoral to 12 m deep.

Distribution: A northern species reported in the British Isles from England, Wales and western Scotland. Europe: Norway.

Similar Species: Antithamnion cruciatum; Pterothamnion plumula.

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

iNaturalist: Scagelia pusilla at iNaturalist World Species Observations database.

WoRMS: Scagelia pusilla at World Register of Marine Species. Accepted name: Scagelothamnion pusillum (Ruprecht) Athanasiadis, 1996. AphiaID: 144693.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Ceramiaceae; Ceramioideae; Scagelieae; Scagelia