angeiocystis angeiocystis angeiocystis is a genus of parasitic alveolate eukaryotes belonging to the phylum apicomplexa. angeiocystis scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: apicomplexa class: conoidasida subclass: coccidiasina order: eucoccidiorida suborder: eimeriorina family: aggregatidae genus: angeiocystisbrasil, 1904 species angeiocystis audouinae taxonomy this genus was created in 1904 by brasil. currently there is only one species recognised in this genus. life cycle this species infects the heart of marine polychaete worms the sporocyts may contain up to 30 sporozoites. the sporozoites are slender and curved with length of up to 25 µm. the gamonts are initially sausage shaped and later become spherical. the microgametes are biflagellated and several are formed from each microgametocyte. host records this parasite was described from the worm cirriformia tentaculata (family cirratulidae). this genus was previously known as audouinia.