Description: A small parasite erect on Callophyllis laciniata, 2 to 4 mm wide or high, irregularly lobed and pale in colour.

Habitat: On Callophyllis laciniata in the sublittoral to 30 m depth.

Distribution: Widely distributed in the British Isles from the Shetlands to the Channel Islands. Europe: Spain, France, Norway and the Faroes. Greenland. Atlantic coast of North America: from Maine to Massachusetts.

Key Identification Features:

• Parasitic on Callophyllis laciniata.

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

iNaturalist: Callocolax neglectus at iNaturalist World Species Observations database.

WoRMS: Callocolax neglectus at World Register of Marine Species. Accepted name: Callocolax neglectus F.Schmitz ex Batters, 1895. AphiaID: 145260.

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