Babesiidae

Piroplasms; piriform, round, or oval; some stages in erythrocytes; others may be in lymphocytes, histiocytes, erythroblasts, or other blood cells; apical complex reduced to a polar ring, rhoptries, and subpellicular microtubules; micronemes present in some stages; micropore sometimes present; binary fission and merogony occur; sexual reproduction probably occurs; vectors are ticks.

Babesiid piroplasms, trophozoites multiply by binary fission in erythrocytes, forming pairs; filaments present on parsitized erythrocytes; in mammals; type and only species: Echinozoon hoogstraali Garnham, 1951.