Gaillona is a genus of algae belonging to the family Callithamniaceae.
Species , four species are accepted: Gaillona gallica (Nägeli) Athanasiadis Gaillona hookeri (Dillwyn) Athanasiadis Gaillona rosea (Roth) Athanasiadis Gaillona seposita (Gunnerus) Athanasiadis
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