Polysiphonia
Protoctista | Rhodomelaceae | Polysiphonia
Exocoelactis
Biota | Animalia | Cnidaria | Anthozoa | Hexacorallia | Actiniaria | Enthemonae | Actinostoloidea | Exocoelactinidae | Exocoelactis
|  | Hatschek, 1888 | Ehrenberg, 1834 | Haeckel, 1896 | Hertwig, 1882 | Rodríguez & Daly in Rodríguez et al., 2014 | Carlgren, 1932 | Carlgren, 1925 | Carlgren, 1925