| RHODOPHYTA : Gracilariales : Pterocladiophilaceae | RED ALGAE |
Description: Minute parasite, up to 1 mm in diameter growing as a small sphere, pinkish in colour, on the frond of Gracilaria gracilis.
Habitat: Parasitic. Lower littoral and sublittoral to 16 m.
Distribution: South-western shores of the British Isles: Cos Galway, Down and Wexford in Ireland; Wales; England from Sussex and Norfolk and from the Isle of Man. Europe: Spain and France.
Similar Species: Similar to the reproductive organs, cystocarps, of Gracilaria but pale in colour.
Key Identification Features:
Distribution Map from NBN: Holmsella pachyderma at National Biodiversity Network mapping facility, data for UK.
iNaturalist: Holmsella pachyderma at iNaturalist World Species Observations database.
WoRMS: Holmsella pachyderma at World Register of Marine Species.
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| Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Holmsella pachyderma. (Reinsch) Sturch. [In] Encyclopedia of Marine Life of Britain and Ireland. https://habitas.org/mbdp/species.php?item=ZM2870. Accessed on 2026-11-01 |