After Szyndlar, 1987, and Lawson, Noonan & Ustach, 2001, with Recent species from Uetz, Etzold. & Chenna, 1995-2000 [“The TIGR Reptile Database ” (former EMBL Reptile Database)]

<==o Viperinae Oppel, 1811 (vipers and adders; kyykäärmeet)
   |-- Adenorhinos barbouri
   |--o Atheris (puukyyt) [11]
   |  |?- A. acuminata
   |  |?- A. anisolepis
   |  |?- A. katangensis
   |  |-- A. chlorechis
   |  `--+--+-- A. desaixi
   |     |  `--+-- A. ceratophora
   |     |     `--+-- A. nitschei
   |     |        `-- A. rungweensis
   |     `--+-- A. hispida
   |        `--+-- A. broadleyi
   |           `--+-- A. subocularis Fischer, 1888 [A. suborbitalis lapsus calami; A. squamigera (Hallowell) Boulenger, 1896]
   |              `-- A. squamigera (Hallowell, 1856) [Echis  squamigera Hallowell, 1856]
   |--o Bitis [14]
   |  |-- B. arietans
   |  |-- B. atropos
   |  |-- B. caudalis
   |  |-- B. cornuta
   |  |-- B. gabonica (gaboninkyy)
   |  |-- B. heraldica
   |  |-- B. inornata
   |  |?- B. lachesis (puffadderi; puffadder)
   |  |-- B. nasicornis (sarvikuonokyy)
   |  |-- B. parviocula
   |  |-- B. peringueyi
   |  |-- B. rubida
   |  |-- B. schneideri
   |  |-- B. worthingtoni
   |  `-- B. xeropaga
   |--o Cerastes [3]
   |  |-- C. gasperettii
   |  |-- C. vipera [C. viperalla]
   |  `-- C. cerastes (sarvikyy)
   |--o Daboia Gray, 1842; Plioc. SWEu.; R. SAs.
   |  |-- †D. maxima Szyndlar, 1988
   |  `-- D. russelii [Vipera russelii] (ketjukyy)
   |--o Echis [8]
   |  |-- E. carinatus (efa, pyramidikyy)
   |  |-- E. coloratus
   |  |-- E. hughesi
   |  |-- E. jogeri
   |  |-- E. leucogaster
   |  |-- E. megalocephalus
   |  |-- E. ocellatus
   |  `-- E. pyramidum
   |-- Eristicophis macmahoni
   |--o Macrovipera [Vipera] [RDB: 4]
   |  |-- M. deserti
   |  |-- M. mauritanica [Vipera mauritanica]
   |  |-- M. schweizeri
   |  `--+-- M. lebetina [Vipera lebetina] (levantinkyy)
   |     |?- †M. platyspondyla (Szyndlar, 1987) [Vipera platyspondyla Szyndlar, 1987]
   |     `?- M. xanthina [Vipera xanthina] (bosborinkyy)
   |-- Montatheris hindii (keniankyy)
   |-- Proatheris superciliaris
   |--o Pseudocerastes [2]
   |  |-- P. fieldi
   |  `-- P. persicus
   `--o Vipera Laurenti, 1768 (adders; kyyt) [25]
      |-- V. albizona
      |-- V. barani
      |-- V. bornMülleri
      |-- V. darevskii
      |-- V. dinniki
      |-- V. eriwanensis
      |-- V. latifii
      |-- V. lotievi
      |-- V. monticola
      |-- V. nikolskii
      |-- V. palaestinae (palestiinankyy) [a member of genus Macrovipera??]
      |-- V. pontica
      |-- V. raddei
      |-- V. renardi
      |-- V. sachalinensis
      |-- V. transcaucasiana
      |-- V. wagneri
      |--o (Rhinaspis) [Vipera aspis -group]
      |  |-- †V. (R.) antiqua Szyndlar, 1987
      |  |-- V. (R.) ammodytes (hietakyy)
      |  |-- V. (R.) aspis (aspiskyy)
      |  `-- V. (R.) latastei (nysäkuonokyy)
      `--o (Vipera) sensu stricto [Vipera berus -group]
         |-- V. (V.) berus (kyy; viper)
         |-- V. (V.) ursinii (kenttäkyy)
         |-- V. (V.) seoanei
         `-- V. (V.) kaznakovi

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