†order Sycidiales (green algae)
Parent taxon: Charophyceae according to E. Taylor et al. 2008
Sister taxa: Chovanellaceae, Coleochaetales, Moellerinales, Pinnoputamenaceae, Trochiliscaceae, Zygnematales
Subtaxa: Sycidium
Ecology: stationary epifaunal "photoautotroph"
Distribution: