Description: Microscopic uniseriate filaments no more than a few cells long and only occasionally branched.

Habitat: Epiphytic on Sporochnus and Carpomitra in the sublittoral to 30 m deep.

Distribution: Cornwal and Devon in England also Galway Bay in Ireland. Europe: Portugal, Atlantic coast of France, Baltic Sea and Norway. Further afield: California.

Similar Species: All species of Acrochaetium, Colaconema and Kylinia are very similar; microscopic examination required for identification.

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

iNaturalist: Kylinia rosulata at iNaturalist World Species Observations database.

WoRMS: Kylinia rosulata at World Register of Marine Species.