Chroococcopsis amethystea (Rosenvinge) Geitler

P. sordide violacea, cellulis vegetativis initio solitariis, a vertice visis rotundatis vel mutua pressione rotundato-angulatis, diametro maximo 10-13 m, hemispaericis, depressis v. subglobosis. Divisionibus repelitis cellularum verlicalibus et horizoritalibus familiae hemisphaericae v. subglobosae, diametro 45 m et ullra tormantur. Divisionibus ultimus sporae minutae, diametro 1—2 m, formantur
V. Gr. : Fiskeniæs (!).
Marine coasts, epiphytic.