Phylogenetic affiliation of P. marinus with dinoflagellates and apicomplexans based on 30 conserved protein sequences.

The consensus trees of concatenated genes of 19 ribosomal proteins (RPs) for 17 taxa (A), 8 RPs for 18 taxa including Oxyrrhis (B) and 11 non-RP proteins (C). Supports of nodes are from NJ (bootstrap), ML (aLRT), and MB (posterior probability). Brackets indicate clades of apicomplexans (AP), dinoflagellates (DI) and ciliates (CI).