Like many species in the Apicomplexia all species in this family have two hosts in their life cycle – one in a vertebrate and one invertebrate. The vertebrate hosts are reptiles or birds but the invertebrate hosts are not known for many of the species.
Species in this family are parasites of erythrocytes and diverse white blood cells. They do not produce pigment but do have an asexual cycle in the blood.
The type genus is Garnia.
There are currently three genera recognised in this family
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