After Carroll, 1988 and Nelson, 1994, with Recent species from Froese & Pauly, 2001 [“The Fishbase”]

Alternative, molecular phylogeny after Berendzen & Dimmick, 2002

<==o Pleuronectiformes [Heterosomata] (flounders; kampelakalat)
   |--o Psettodidae [Psettodoidei] (alkukampelat)
   |  |-- †Joleaudichthys M. Eoc. NAf. 
   |  `--o Psettodes
   |     |-- P. belcheri Bennett, 1831 (Spottail spiny turbot)
   |     |-- P. bennetti Steindachner, 1870 (Spiny turbot)
   |     `-- P. erumei (Bloch & Schneider, 1801) (Indian spiny turbot)
   `--o Pleuronectoidei (uuskampelat)
      |-- Citharidae (isosilmäkampelat) [FB: 4/6]
      `--+== Pleuronectidae (righteye flounders; oikeasilmäkampelat) [FB: 35/90] [paraphyletic]
         `--+--o “Bothoidea”
            |  |-- Bothidae () [20/115]
            |  |-- Achiropsettidae (southern flounders) [3/5]
            |  |-- Scophthalmidae (silokampelat) []
            |  `-- Paralichthyidae (Large-tooth flounders) [N: 16/85] [FB: 14/102]
            `--+-- Samaridae ()? [N: 3/20] [FB: 3/17]
               `--+-- Achiridae (amerikankielikampelat; American soles) [FB: 9/31]
                  |-- Soleidae (kielikampelat) [Nelson: 20/89] [Fishbase: 27/106]
                  `-- Cynoglossidae (etelänkielikampelat)

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