[Scala naturae Aristoteles, nom. inval.]
   ["Animalia" nom. inval.] see Kingdom Animalia nom. inval.
     ["ánhaima" Aristoteles, nom. inval. - bloodless animals]
       ["malakóstraka" Aristoteles, nom. inval. - crustaceans] see Class Malacostraca Latreille, 1802
         ["καρκίνοι" nom. inval.]
           ["karkinos" nom. inval.] see Infraorder Brachyura Latreille, 1802
             ["καρκίνοι μικροί" nom. inval. - blue-leg swim crab] see Polybius depurator (C. Linnaeus, 1758)