Fungi (Jahn & Jahn, 1959)
   Class Gymnocarpi
     Order Hymenothecii
       Agarici
         Genus Agaricvs L. (1753), nom. sanct., nom. cons.
           Section Plevropvs (Pers.) Pers. (1801)
             * Pileo integro, stipite excentrico.
             ** Pileo dimidiato, stipite marginali, lamellis decurrentibus ex latere pilei diuergentibus. (Merulius bryophilus, et muscigenus.)
             *** Pileo dimidiato suberoso. (Agar. quercinus L. vid. Daedal. querc.)