Glugea is a genus of microsporidian parasites, predominantly infecting fish.Thélohan, P. 1891. Sur deux Sporozoaires nouveaux, parasites des muscles des Poissons. Comptes rendus hebdomadaires des séances de l'Académie des sciences 112(3): 168–171. Infections of Glugea cause xenoma formation.
Currently, Phylogenetic tree of this genus seem unreliable, as not enough evidence is present, therefore species with their common hosts are given in a list:
G. anomala (syn. G. weissenbergi) – a parasite of the three-spined stickleback and the ninespine stickleback G. atherinae – a parasite of the big-scale sand smelt G. berglax – a parasite of the roughhead grenadier G. bychowski – a parasite of the Caspian anadromous shad G. capverdensis – a parasite of the spotted lanternfish G. heraldi – a parasite of the seahorse Hippocampus erectus G. hertwigi – a parasite of the European smelt and the Rainbow smelt G. nagelia – a parasite of the yellowfin hind G. plecoglossi – a parasite of the ayu sweetfish G. sardinellensis – a parasite of fish of the genus Sardinella G. shiplei – a parasite of fish of the pouting G. stephani – a parasite of Pleuronectes flesus, the winter flounder, the English sole, and the Common dab G. vincentiae – a parasite of the Australian marine teleost fish, Vincentia conspersa G. truttae – a parasite of the brown trout
Spraguea lophii has formerly been described as G. americanus.
Microgemma caulleryi that infects the greater sand eel was previously classified as G. caulleryi.
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