CHROMOPHYTA : Ectocarpales : ChordariaceaeBROWN ALGAE

Cylindrocarpus microscopicus P Crouan et H Crouan


Description: Filaments grow endophytically within Gracilaria bursa-pastoris, emerging as erect microscopic tufts.

Habitat: Rare. Endophytic in Gracilaria bursa-pastoris.

Distribution: Apparently found only on the south coast of England and north France.

Similar Species: Petrospongium berkeleyi (Gravelle) Nägeli ex Kützing.

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

iNaturalist: Cylindrocarpus microscopicus at iNaturalist World Species Observations database.

WoRMS: Cylindrocarpus microscopicus at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Cylindrocarpus microscopicus. P Crouan et H Crouan. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZR2760. Accessed on 2026-11-01