After Nelson, 1994, with Recent species from Froese & Pauly, 2001 [“The Fishbase”]

<==o Hexagrammoidei
   |--o Zaniolepidae [2/3]
   |  |-- Oxylebius pictus Gill, 1862 (Painted greenling)
   |  `--o Zaniolepis (kampasimput)
   |     |-- Z. frenata Eigenmann & Eigenmann, 1889 (Shortspine combfish)
   |     `-- Z. latipinnis Girard, 1858 (Longspine combfish)
   `--o Hexagrammidae (vihersimput; greenlings) [5/11]
      |-- †Achrestogrammus ?U. Mioc. NA. 
      |-- †Zemigrammatus Mioc. NA. 
      |--o Hexagrammus [Hexagramminae]
      |  |-- H. (Agrammus) agrammus (Temminck & Schlegel, 1843)
      |  `--o (Hexagrammus) [5]
      |     |-- H. decagrammus (Pallas, 1810) (Kelp greenling)
      |     |-- H. lagocephalus (Pallas, 1810) (Rock greenling)
      |     |-- H. octogrammus (Pallas, 1814) (Masked greenling)
      |     |-- H. otakii Jordan & Starks, 1895
      |     `-- H. stelleri Tilesius, 1810 (Whitespotted greenling)
      |--o Pleurogrammus [Pleurogramminae]
      |  |-- P. azonus Jordan & Metz, 1913 (Okhostk atka mackerel)
      |  `-- P. monopterygius (Pallas, 1810) (Atka mackerel)
      |-- Ophiodon elongatus Girard, 1854 [Ophiodontinae] (lingcod)
      `-- Oxylebius pictus [Oxylebiinae] (painted greenling)

Reference(s):