Synonym: Ulvophytopsida [replaced name]
Parent taxon: Chlorophyta according to K. Tripalo 2017
See also Kenrick and Crane 1997, LoDuca et al. 2021, Tang et al. 2020, Taylor et al. 2008 and Waggoner and Hagadorn 2004
Sister taxa: Amgaella, Bryopsidophyceae, Calathella, Caulerpites, Charophyceae, Chlorophyceae, Chuariophyceae, Dasycladophyceae, Doushantuophyton, Fuxianospira, Indopolia, Laenigma, Lanceoforma, Megaspirella, Microfasta, Monostysisyrinaceae, Palaeomastigocladus, Parallelphyton, Physophycus, Proterotainia, Pseudopalaeoporella, Retephycus, Schizosporis, Sgrossoella, Sinocylindra, Sinophyllum, Sphaeroporella, Spheroporella, Tetrasporaceae, Thaumatoporellales, Timanella, Walcottophycus, Yakutina
Subtaxa: Bryopsidales Cladophorales Cyclocrinales Siphonocladales Ulvales Vermiporella
Ecology: stationary epifaunal "photoautotroph"