Children (5 direct children, 5 direct and indirect children):
        
        
        
            
                Montana arctic grayling
                
                
                    Thymallus arcticus montanus
                
                
            
                Thymallus arcticus arcticus
                
                
                
            
                Thymallus arcticus grubii
                
                
                
            
                Thymallus arcticus mertensii
                
                
                
            
                Thymallus arcticus nigrescens