Description: Small uniseriate filaments, branching and erect to 10 mm.

Habitat: Epiphytic on algae and epizoic on Patella in the sublittoral to 8 m.

Distribution: Widely distributed on the south coasts of England: Devon and Dorset and the Channel Islands also recorded from Northern Ireland and Scotland. Europe: Spain and France.

Similar Species: All species of Colaconema and Acrochaetium (Audouinella) are similar, microscopic examination is usually required for identification.

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

iNaturalist: Colaconema caespitosum at iNaturalist World Species Observations database.

WoRMS: Colaconema caespitosum at World Register of Marine Species. Accepted name: Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton, 1991. AphiaID: 162871.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Nemaliophycidae; Colaconematales; Colaconemataceae; Colaconema