Syndiniales

Taxobox
color = greenyellow
name = Syndiniales
domain = Eukaryota
regnum = Chromalveolata
superphylum = Alveolata
phylum = Dinoflagellata
classis = Syndiniophyceae
ordo = Syndiniales
ordo_authority = Loeblich III 1976The Syndiniales are an order of dinoflagellates, found exclusively as endosymbionts of marine animals and protozoa. The trophic form is often multinucleate, and ultimately divides to form motile spores, which have two flagella in typical dinoflagellate arrangement. They lack a theca and chloroplasts, and unlike all other orders, the nucleus is never a dinokaryon. A well-studied example is "Amoebophrya", which is a parasite of other dinoflagellates and may play a part in ending red tides.