Description: A flat, soft, frond growing from a small disc and stipe, usually much branched, basically dichotomously in a fan like manner to a length of 15 cms. The cystocarps are produced in marginal proliferations which can be clearly seen.

Habitat: Common. Epilithic or epiphytic on Laminaria from the upper sublittoral to over 30 m deep. In both sheltered and exposed areas.

Distribution: Widespread and generally distributed in the British Isles from the Shetlands to the Channel Islands. Europe: Mediterranean, Portugal, Spain, Faroes and Norway.

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

iNaturalist: Metacallophyllis laciniata at iNaturalist World Species Observations database.

WoRMS: Metacallophyllis laciniata at World Register of Marine Species. Accepted name: Metacallophyllis laciniata (Hudson) A.Vergés & L.Le Gall, 2017. AphiaID: 1311357.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Gigartinales; Kallymeniaceae; Metacallophyllis