The current analysis is limited in that only the sequences from one or two species of Perkinsus were available. Perkinsus appears more distant from apicomplexans than from dinoflagellates; however its generally close relationship with the clade of dinoflagellates could be due to the absence of taxa from intermediate lineages such as marine alveolate group I, additional taxa from the Perkinsozoa (e.g. Parvilucifera spp.), and dinoflagellates of the class Syndiniales.