Children (14 direct children, 51 direct and indirect children):
        
        
        
            
                Beaver
                
                    (tree size 17)
                
                
                    Castor
                
                
            
                Castoroides
                
                    (tree size 2)
                
                
                    Giant beaver
                
                
            
                Palaeocastor
                
                
                
            
                Agnotocastor
                
                    (tree size 2)
                
                
                
            
                Trogontherium
                
                    (tree size 1)
                
                
                
            
                Castorinae
                
                    (tree size 4)
                
                
                
            
                Castorini
                
                
                
            
                Migmacastor
                
                    (tree size 1)
                
                
                
            
                Boreofiber
                
                    (tree size 2)
                
                
                
            
                Agnotocastorinae
                
                    (tree size 2)
                
                
                
            
                Euroxenomys
                
                
                
            
                Castoroidinae
                
                    (tree size 6)
                
                
                
            
                Palaeocastorinae
                
                
                
            
                Trogontheriinae