[Scala naturae Aristoteles, nom. inval.]
   ["Animalia" nom. inval.] see Kingdom Animalia nom. inval.
     ["ánhaima" Aristoteles, nom. inval. - bloodless animals]
       ["ostrakóderma" nom. inval. - testaceous mollusca]
         1 ["εχίνοι" - sea urchins]
         1.0 ["εχίνοι" - sea urchins]
         2 ["ἀστέρες" - sea stars]
         2.0 ["ἀστέρες" - sea stars]
         3 ["téthua" - ascidian mollusks]
         3.0 ["τήθυα"]
         4 ["monóthura" Aristoteles, nom. inval.] see monothyra nom. inval.
         4.0 ["μονόθυρα" nom. inval.]
         5 ["strombóde" Aristoteles, nom. inval. - univalve mollusks]
         5.0 ["στρομβώδη"]
         6 ["díthura" Aristoteles, nom. inval. - bivalves] see dithyra nom. inval.
         6.0 ["δίθυρα" nom. inval. - bivalves]