Description: Thallus minute and microscopic, monostromatic with multiseriate terete filaments

Habitat: Rare. Epiphytic in the sublittoral.

Distribution: Widespread in the British Isles. Europe: France. Further afield: Jamaica and the Canary Islands.

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

iNaturalist: Porphyrostromium ciliare at iNaturalist World Species Observations database.

WoRMS: Porphyrostromium ciliare at World Register of Marine Species. Accepted name: Porphyrostromium ciliare (Carmichael) M.J.Wynne, 1986. AphiaID: 145501.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Proteorhodophytina; Compsopogonophyceae; Erythropeltales; Erythrotrichiaceae; Porphyrostromium