Children (4 direct children, 18 direct and indirect children):
        
        
        
            
                Retropinna
                
                    (tree size 5)
                
                
                
            
                Stokellia
                
                    (tree size 1)
                
                
                
            
                Retropinninae
                
                    (tree size 2)
                
                
                
            
                Prototroctinae
                
                    (tree size 6)