Valid publication of Symbiodinium Freudenthal, 1962, however a synonym of Zooxanthella according to Guiry & Andersen, 2018.
Guiry, M. D.; Andersen, R. A. (2018). Validation of the generic name Symbiodinium (Dinophyceae, Suessiaceae) revisited and the reinstatement of Zooxanthella K.Brandt. <em>Notulae Algarum.</em> 58: 1-5.available online athttp://www.notulaealgarum.com/documents/Notulae%20algarum%20No.%2058.pdf