Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       particles
         hadrons - composite particles
           mesons - bosonic hadrons
             bottom, strange mesons
               1.1 B(s)0
               1.2 ¯B(s)0
               2.1 B(s)*
               2.2 ¯B(s)*
               3.1 B(s1)(5830)0
               3.2 ¯B(s1)(5830)0
               4.1 B(s2)*(5840)0
               4.2 ¯B(s2)*(5840)0