Fusiona is a genus of the family Fusionidae in the phylum Apicomplexa
There is one species - Fusiona geusi - in this genus. This species infects bees.
This genus was created in 1965 by Stejskal.[1]
Species in this family are homoxenous.
Gametocytes - not described
Spores - not described
Both gamonts and trophozoites are septate. The gamonts are morphologically different (anisogamous).
Sexual reproduction involves a cephalocaudal association. During syzygy the nucleus and entrocyte of the satellite move to the primite where they fuse.