Class Actinopterygii Woodward, 1891 - ray-finned fishes
   Subclass Neopterygii Regan, 1923
     Infraclass Teleostei Müller, 1845
       Supercohort Teleocephala de Pinna, 1996
         Clupeocephala
           Cohort Euteleosteomorpha (Greenwood et al., 1966)
             Subcohort Protacanthopterygii Greenwood et al., 1966
               Order Argentiniformes Johnson & Patterson, 1996 - marine smelts
                 Suborder Argentinoidei Bertelsen, 1958
                   1 Family Argentinidae Bonaparte, 1838 - argentines
                   2 Family Opisthoproctidae - spookfishes
                   3 Family Microstomatidae