The opisthokonts (Greek: (opísthios) = "rear, posterior" + (kontós) = "pole" i.e. "flagellum") are a broad group of eukaryotes, including both the animal and fungus kingdoms, together with the eukaryotic microorganisms that are sometimes grouped in the paraphyletic phylum Choanozoa (conventionally assigned to the protist 'kingdom'). The opisthokonts, sometimes referred to as the 'Fungi/Metazoa group', are generally recognized as a monophyletic clade.

The opisthokonts (Greek: (opísthios) = "rear, posterior" + (kontós) = "pole" i.e. "flagellum") are a broad group of eukaryotes, including both the animal and fungus kingdoms, together with the eukaryotic microorganisms that are sometimes grouped in the paraphyletic phylum Choanozoa (conventionally assigned to the protist 'kingdom'). The opisthokonts, sometimes referred to as the 'Fungi/Metazoa group', are generally recognized as a monophyletic clade.