Spheciformes
AmmoplanidaeAmpulicidaeAstatidaeBembicidaeCrabronidaeMellinidaePemphredonidaePhilanthidaePsenidaeSphecidaeAnthophila
AndrenidaeApidaeColletidaeHalictidaeMegachilidaeMelittidaeStenotritidaeIncertae sedis
†Angarosphecidae†PaleomelittidaeThe superfamily Apoidea is a major group within the Hymenoptera, which includes two traditionally recognized lineages, the "sphecoid" wasps, and the bees. Molecular phylogeny demonstrates ...
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that the bees arose from within the traditional "Crabronidae", so that grouping is paraphyletic, and this has led to a reclassification to produce monophyletic families.