Species in the family are generally spread by the oral-faecal route. Replication occurs in the gut.
Development is extracellular. The parasites develop attached to the host cell by an epimerite.
Merogony occurs when nuclei are peripheral within the cell. The merozoites form a bouquet structure around the parent cell.
The gamonts are elongated with an anterior neck. The gametes have similar morphology. The gametocysts give rise to one to eight oocysts.
