After Harding & Welch, 1980

<==o Hydrophiini
   |-- Acalyptophis peroni (Dumeril, 1853) Boulenger, 1896
   |-- Astrotia stokesii
   |?- Aturia
   |--o Disteira
   |  |-- D. kingii
   |  |-- D. major
   |  `-- D. walli
   |--o Enhydrina
   |  |-- E. schistosa [E. schistosalla]
   |  `-- E. zweifeli
   |-- Hydrophis
   |-- Kerilia jerdonii
   |-- Kolpophis annandalei
   |-- Lapemis curtus
   |?- Leioselasma
   |-- Pelamis platurus
   |-- Thalassophina viperina
   `-- Thalassophis anomalus

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