Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       particles
         hadrons - composite particles
           baryons - fermionic hadrons
             1 N baryons - baryons with three u and/or d quarks (I=1/2)
             2 Delta baryons - baryons with three u and/or d quarks (I=3/2)
             3 Lambda baryons - baryons with two u and/or d quarks (I=0)
             4 Sigma baryons - baryons with two u and/or d quarks (I=1)
             5 Xi baryons - baryons with one u or d quark (I=1/2)
             6 Omega baryons - baryons with no u or d quarks (I=0)
             7 charmed baryons
             8 "doubly charmed baryons" [unconfirmed]
             9 bottom baryons