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Hydnaceae (order Aphyllophorales) A family of fungi, in which the fruit bodies are typically mushroom-shaped and bear the hymenium on pendulous, tooth-like spines. They are found on wood, soil, etc. They are mostly rare, often producing fruit bodies only at intervals of several years. Many genera formerly included in this family are now considered to belong to other families, e.g. the Auriscalpiaceae.