Fungi (Jahn & Jahn, 1959)
   Class Gymnocarpi
     Order Hymenothecii
       Agarici
         Genus Agaricvs L. (1753), nom. sanct., nom. cons.
           Section Pratella Pers. (1801)
             Pileo vtplurimum fragili membranaceo (subaquosa substantia), stipite nudo.