According to the International Committee on the Taxonomy of Viruses, they have not been classified: http://www.ictvonline.org/virusTaxonomy.asp. As far as I know they have not been officially classified yet. According to Yutin et al.'s phylogenetic analysis, these viruses seem to be more closely related to Mimiviruses (and relatives) than to the classic "Phycodnaviruses".