Tynommatidae is a family of millipedes in the order Callipodida. There are about 12 genera and more than 30 described species in Tynommatidae, found mainly in western North America.

Tynommatidae was formerly considered a subfamily (Tynommatinae) of Schizopetalidae, but has been elevated in rank to family, and includes North American millipedes from the family Schizopetalidae.

Genera These 12 genera belong to the family Tynommatidae:

Aspidiophon Shelley, 2000 Caliactis Shelley, 1996 Colactis Loomis, 1937 Colactoides Shelley, 1997 Diactis Loomis, 1937 Etiron Chamberlin, 1941 Florea Shelley, 1996 Heptium Loomis, 1937 Idrionaria Shelley, 1996 Mexicopetalum Stoev & Shelley, 2009 Texophon Chamberlin, 1946 Tynomma Loomis, 1937

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