<==o Boidae Gray, 1825 (boas; boat)
   |?-o †Anilioides
   |  |-- †A. nebraskensis Holman
   |  `-- †A. minuatus
   |?- †Bavarioboa hermi Szyndlar & Schleich, 1993, Mioc. CEu. [cf. Gongylophis sp. (Szyndlar, 1987)]
   |?- †Cadurcoboa Rage, 1978
   |?- †Cheilophis huerfanoensis Gilmore, 1938
   |?- †Daunophis Swinton, 1926
   |?- †Dawsonophis Holman, 1979
   |?-o †Geringophis Holman
   |  |-- †G. depressus Holman
   |  `-- †G. yatkolae Holman
   |?- †Huberophis
   |?- †Lithophis sargenti Marsh, 1871
   |?-o †Lichanura Cope, 1861 [Paraepicrates Hecht, 1959]
   |  `-- †L. brevispondylus McGrew et al., 1959 [Paraepicrates brevispondylus McGrew et al., 1959]
   |?- †Paleryx Owen, 1850
   |?- †Plesiotortrix Rochebrune, 1884
   |?-o †Pterygoboa Holman, 1976
   |  |-- †P. miocenica Holman, 1976
   |  `-- †P. delawarensis Holman, 1998
   |?- †Tregophis brevirachis Holman, 1975
   |-- Boinae (boakäärmeet)
   `-- Erycinae (hietaboakäärmeet)

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