The Lygaeoidea are a sizeable superfamily of true bugs, containing seed bugs and allies, in the order Hemiptera. There are about 16 families and more than 4,600 described species in Lygaeoidea, found worldwide. Most feed on seeds or sap, but a few are predators.

The ash-gray leaf bug family (Piesmatidae) is generally considered a member of the superfamily Lygaeoidea, but in the past it was sometimes placed in its own superfamily.

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