Adelina is a genus of alveolates within the phylum Apicomplexa. They are coccidian parasites of arthropods and oligochaetes.[1] Host orders include Coleoptera, Diptera, Collembola, Embioptera, Lepidoptera and Orthoptera.
The genus was created by Hesse in 1911 to accommodate a number of species within the genus Adelea that differed significantly: the sporocysts in Adelina are fewer in number than in Adelea and are spherical instead of being discoidal. The type species is Adelina octospora .
Members of this genus have spherical or subspherical oocysts. The sporocysts are spherical and thick-walled.