fusionidae fusionidae fusionidae is a family of the superfamily fusionicae in the phylum apicomplexa fusionidae scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: apicomplexa class: conoidasida subclass: gregarinasina order: eugregarinorida suborder: septatorina superfamily: fusionicae family: fusionidae genus fusiona taxonomy there is one genus - fusiona - in this family. history this family was created in 1965 by stejskal. description species in this family are homoxenous. gametocytes - not described spores - not described both gamonts and trophozoites are septate. the gamonts are morphologically different (anisogamous). sexual reproduction involves a cephalocaudal association. during syzygy the nucleus and entrocyte of the satellite move to the primite where they fuse.