Description: Thallus small, terete cylindrical fronds up to 10 cms long with irregular branching. Composed of an axial filament with whorls of three or four branchlets. Mucilaginous.

Habitat: Rare. On stones and pebbles and small shell fragments in the sublittoral to 20 m.

Distribution: British Isles in Ireland, Scotland, Wales and England. Europe: Mediterranean, France (Brittany), Sweden.

Similar Species: Calosiphonia vermicularis (J.Ag) Schmitz.

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

iNaturalist: Schmitzia neapolitana at iNaturalist World Species Observations database.

WoRMS: Schmitzia neapolitana at World Register of Marine Species. Accepted name: Schmitzia neapolitana (Berthold) P.C.Silva, 1959. AphiaID: 145604.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Gigartinales; Calosiphoniaceae; Schmitzia