Hapalocystis is a genus of fungi in the family Sydowiellaceae.
Species As accepted by Species Fungorum; Hapalocystis berkeleyi Hapalocystis bicaudata Hapalocystis corni Hapalocystis kickxii Hapalocystis occidentalis Hapalocystis ulmi Hapalocystis vexans
Former species; H. berkeleyi var. kickxii = Hapalocystis kickxii, Sydowiellaceae H. mirabilis = Sorokinocystis mirabilis, Chytridiales order
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