<==o Elapidae (myrkkytarhakäärmeet)
   |?- †Palaeonaja
   |--o Calliophis [Elaps, Hemibungarus] [Calliophiinae]
   |  |-- C. beddomei
   |  |-- C. bibroni
   |  |--o C. calligaster (Wiegmann, 1835) Slowinski, Boundy & Lawson, 2001 [Elaps calligaster, Hemibungarus calligaster, ]
   |  |  |-- C. c. calligaster (Wiegmann, 1835)
   |  |  |-- C. c. gemianulis (Peters, 1872)
   |  |  `-- C. c. macclungi (Taylor, 1922)
   |  |-- C. gracilis
   |  |-- C. kelloggi
   |  |-- C. macclellandi
   |  |-- C. maculiceps
   |  |-- C. melanurus
   |  `-- C. nigrescens
   `--+--o Maticora [Maticorinae] (rauhaskäärmeet)
      |  |-- M. bivirgata [M. bivirgatalla]
      |  `-- M. intestinalis
      `--+-- Elapinae (myrkkytarhakäärmeet)
         `--+--o Laticauda [Laticaudinae] (lattapyrstökäärmeet)
            |  |-- L. colubrina (lattapyrstökäärme)
            |  `-- L. septemfasciata
            `--+-- Bungarinae (cobras and relatives; kobrat)
               `-- Hydrophiinae [Hydrophiidae] (sea serpents; merikäärmeet)

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