The Omphalotaceae are a family of fungi in the order Agaricales.

Basidiocarps (fruit bodies) are most frequently agarics (gilled mushrooms), but occasionally corticioid (in the genus Brunneocorticium)[1] or poroid (in the genus Hymenoporus).

[2] The family was originally described in 1985 by German mycologist Andreas Bresinsky to accommodate the genus Omphalotus (including Lampteromyces) based on anatomical and morphological characters which he considered distinctive.

[3] Subsequent molecular research, based on cladistic analysis of DNA sequences, indicated, however, that Omphalotus belonged within the Agaricales.

[4] Moreover, the genus formed a monophyletic clade with a much larger group of fungi, many of which were formerly placed in the Marasmiaceae.