Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       particles
         hadrons - composite particles
           mesons - bosonic hadrons
             bottom mesons
               1.1 B+
               1.2 B-
               2.1 B0
               2.2 ¯B0
               3.1 B*+
               3.2 B*-
               3.3 B*0
               3.4 ¯B*0
               4.1 B(1)(5721)0
               4.2 ¯B(1)(5721)0
               5.1 B(2)*(5747)0
               5.2 ¯B(2)*(5747)0