| Nigrohydnum | |
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| Genus: | Nigrohydnum Ryvarden (1987)
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| Type species | |
| Nigrohydnum nigrum Ryvarden (1987)
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Nigrohydnum is a fungal genus in the order Polyporales. It contain a single species, Nigrohydnum nigrum, a rare toothed polypore known from only a few collections in Brazil.