Description: Thallus filamentous, erect to 12 cms long and finely branched and tufted. Older parts corticate

Habitat: Epilithic, epizois and epilithic. Sublittoral to 20 m depth.

Distribution: Widely distributed in the British Isles including the Shetlands. Europe: the Mediterranean, Portugal, Spain, France, the Baltic, Netherlands and Norway. Atlantic coast of North America: Canada, Massachusetts to New Jersey. Further afield: Canary Islands.

Similar Species: Aglaothamnionm tenuissimum (Bonnemaison) Feldmann-Mazoyer

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

iNaturalist: Seirospora interrupta at iNaturalist World Species Observations database.

WoRMS: Seirospora interrupta at World Register of Marine Species. Accepted name: Seirospora interrupta (Smith) F.Schmitz, 1893. AphiaID: 144697.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Callithamniaceae; Callithamnioideae; Euptiloteae; Seirospora