phagomyxid phagomyxid phagomyxids are a group of obligate endoparasitic protists belonging to the subphylum endomyxa in cercozoa. taxonomically, they are united under a single family phagomyxidae, order phagomyxida, sister to the plasmodiophores. phagomyxids right column: phagomyxida. scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: rhizaria phylum: endomyxa class: phytomyxea order: phagomyxidacavalier-smith, 1993 family: phagomyxidaecavalier-smith, 1993 genera phagomyxa maullinia ecology phagomyxids are mainly parasites of brown algae, but some can parasite oomycetes. taxonomy the group was created in 1993 by cavalier-smith, when it contained only the genus phagomyxa. since then, maullinia, a genus previously in plasmodiophoridae, has joined the phagomyxids. phagomyxa karling, 1944 maullinia i. maier, e.r. parodi, westermeier & d.g. müll., 2000