babesiidae babesiidae babesiidae is a family of protists belonging to the order piroplasmida. babesiidae babesia sp. scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: apicomplexa class: aconoidasida order: piroplasmida family: babesiidae genera: babesia starcovivi, 1893 echinozoon garnham, 1951