selenidiidae selenidiidae the selenidiidae are a family of parasitic alveolates in the phylum apicomplexa. selenidiidae scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: apicomplexa class: conoidasida subclass: gregarinasina order: eugregarinorida suborder: aseptatorina family: selenidiidae genera digyalum ditrypanocystis heterospora selenidium selenocystis taxonomy there are five genera in this family. history this family was created by brasil in 1907. description