Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       particles
         hadrons - composite particles
           baryons - fermionic hadrons
             bottom baryons
               1 Lambda(b)0 - bottom Lambda
               2.1 Sigma(b)+ - positive bottom Sigma
               2.2 Sigma(b)0
               2.3 Sigma(b)- - negative bottom Sigma
               3.1 Sigma(b)*+
               3.2 Sigma(b)*-
               4.1 Xi(b)0 - neutral bottom Xi
               4.2 Xi(b)- - negative bottom Xi