After Parker, 1982

<==o Ephemeroptera (päivänkorennot; mayflies)
   |--o SCHISTONOTA
   |  |--o BAETOIDEA
   |  |  |-- Siphlonuridae
   |  |  |-- Baetidae
   |  |  |-- Oniscigastridae
   |  |  |-- Ameletopsidae
   |  |  `-- Ametropodidae
   |  |--o HEPTAGENIOIDEA
   |  |  |-- Coloburiscidae
   |  |  |-- Oligoneuriidae
   |  |  |-- Isonychiidae
   |  |  `-- Heptageniidae
   |  |--o LEPTOPHLEBIOIDEA
   |  |  `-- Leptophlebiidae
   |  `--o EPHEMEROIDEA
   |     |-- Behningiidae
   |     |-- Potamanthidae
   |     |-- Euthyplociidae
   |     |-- Polymitarcyidae
   |     |-- Ephemeridae(surviaiset)
   |     `-- Palingeniidae
   `--o PANNOTA
      |--o EPHEMERELLOIDEA
      |  |-- Ephemerellidae
      |  |-- Leptohyphidae
      |  `-- Tricorythidae
      `--o CAENOIDEA
         |-- Neoephemeridae
         |-- Baetiscidae
         |-- Caenidae
         `-- Prosopistomatidae

Reference(s):