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

<==o Achiridae (amerikankielikampelat; American soles) [FB: 9/31]
   |-- Achiropsis nattereri Steindachner, 1866
   |--o Achirus Plioc. NAf. R. Oc. [10]
   |  |-- A. achirus (Linnaeus, 1758) (Drab sole)
   |  |-- A. declivis Chabanaud, 1940 (Plainfin sole)
   |  |-- A. errans Miranda-Ribeiro, 1915
   |  |-- A. hartzfeldii Bleeker, 1853 (Hook-nosed sole)
   |  |-- A. klunzingeri (Steindachner, 1880) (Brown sole)
   |  |-- A. lineatus (Linnaeus, 1758) (Lined sole)
   |  |-- A. mazatlanus (Steindachner, 1869) (Mazatlan sole)
   |  |-- A. novoae Cervigón, 1982
   |  |-- A. poropterus Bleeker, 1851 (Estuary sole)
   |  `-- A. scutum (Günther, 1862) (Network sole)
   |--o Apionichthys [2]
   |  |-- A. dumerili Kaup, 1858 (Longtail sole)
   |  `-- A. unicolor (Günther, 1862)
   |-- Baiostoma [not recognized by the Fishbase]
   |--o Catathyridium [3]
   |  |-- C. garmani (Jordan, 1889)
   |  |-- C. jenynsii (Günther, 1862)
   |  `-- C. lorentzii (Weyenbergh, 1877)
   |--o Gymnachirus [3]
   |  |-- Gymnachirus melas Nichols, 1916 (North American naked sole)
   |  |-- Gymnachirus nudus Kaup, 1858 (Naked sole)
   |  `-- Gymnachirus texae (Günther, 1936) (Gulf of Mexico fringed sole)
   |-- Hypoclinemus mentalis (Günther, 1862)
   |-- Pnictes asphyxiatus (Jordan, 1889)
   |-- Soleonasus finis Eigenmann, 1912
   `--o Trinectes [9]
      |-- T. fimbriatus (Günther, 1862) (Fringed sole)
      |-- T. fluviatilis (Meek & Hildebrand, 1928) (Freshwater sole)
      |-- T. fonsecensis (Günther, 1862) (Spottedfin sole)
      |-- T. inscriptus (Gosse, 1851) (Scrawled sole)
      |-- T. maculatus (Bloch & Schneider, 1801) (Hogchoker)
      |-- T. microphthalmus (Chabanaud, 1928)
      |-- T. opercularis (Nichols & Murphy, 1944) (Spottedcheek sole)
      |-- T. paulistanus (Miranda-Ribeiro, 1915) (Slipper sole)
      `-- T. zebrinus (Clark, 1936)

Reference(s):