PhialellaPhialella is a genus of hydrozoans. It is the only genus within the monotypic family Phialellidae.SpeciesThe following species are recognized within the genus Phialella:Phialella belgicae Phialella chilensis Phialella chiquitita Phialella falklandica Browne, 1902Phialella fragilis Phialella macrogona Xu, Huang & Wang, 1985Phialella parvigastra Phialella quadrata Phialella xiamenensis Huang, Xu, Lin & Guo, 2010Phialella zappai Boero, 1987