Description: Thallus filamentous, erect to 8 cms long. Main axis may show cortication fromed by rhizoidal filaments growing downwards.

Habitat: Epiphytic in the lower littoral and shallow sublittoral..

Distribution: Generally recorded from south-west coasts of the British Isles. Europe: the Mediterranean, France, Denmark and Sweden.

Similar Species: All species of Aglaothamnion and Callithamnion are similar and not easy to identify.

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

iNaturalist: Aglaothamnion gallicum at iNaturalist World Species Observations database.

WoRMS: Aglaothamnion gallicum at World Register of Marine Species. Accepted name: Gaillona gallica (Nägeli) Athanasiadis, 2016. AphiaID: 1311367.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Callithamniaceae; Callithamnioideae; Callithamnieae; Aglaothamnion