After Parker, 1982, “The Tree of Life”, and Grimaldi & Engel, 2005

<==o Aculeata (poisonous wasps; myrkkypistiäiset)
   |-- †Bethylonymidae
   `--+-- Chrysidoidea
      `--o Euaculeata
         |-- Vespoidea [incl. Pompiloidea, Scolioidea & Formicioidea] (ampiaismaiset pistiäiset; wasp-like)
         `--o Apoidea [incl. Sphecoidea]
            |-- †Angarosphecidae
            `--+-- Heterogynaeidae
               `--+-- Ampulicidae [Sphecidae: Ampulicinae
                  `--+--o Sphecidae
                     |  |-- Sphecinae (hietapistiäiset)
                     |  |-- Philanthinae
                     |  |-- Larrinae
                     |  |-- Nyssoninae
                     |  `-- Pemphredoninae (kirvapistiäiset)
                     `--+-- Crabronidae [Sphecidae: Crabroninae]
                        `--+-- †Melittosphex burmensis Poinar & Danforth, 2006 [Melittosphecidae Poinar & Danforth, 2006]
                           `-- Anthophila (mesipistiäiset, bees)

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