bicosidia bicosidia bicosidia is a subclass of bikosea, a small group of unicellular flagellates, included among the heterokonts. bicosidia cafeteria roenbergensis, a non-loricate bicosoecid scientific classification domain: eukaryota (unranked): sar superphylum: heterokonta class: bikosea subclass: bicosidiacavalier-smith, 2013 superorders borokiae cyathobodoniae