Description: Minute parasite on Rhodomela confervoides. Cushon-like, up to 2 mm in diameter. Pale to whitish in colour.

Habitat: Widespread but only on Rhodomela. Littoral into the sublittoral to 26 m.

Distribution: Generally distributed around the British Isles. Europe: France, the Baltic, Norway, Faroes, Iceland and north Russia. Greenland. Atlantic coast of North America: Canada and from Maine to Rhode Island, also in the Pacific.

Similar Species: Choreocolax polysiphoniae Reinsch however Harveyella grows only on Rhodomela.

Key Identification Features:

• Small epiphyte on Rhodomela.

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

iNaturalist: Harveyella mirabilis at iNaturalist World Species Observations database.

WoRMS: Harveyella mirabilis at World Register of Marine Species. Accepted name: Harveyella mirabilis (Reinsch) F.Schmitz & Reinke, 1889. AphiaID: 145610.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Rhodomelaceae; Rhodomeleae; Harveyella