Crotalus molossus (Black Tailed Rattlesnake) | CLASSIFICATION

Kingdom Animalia (animals)
- Eumetazoa (metazoans)
  - Bilateria (bilaterally symmetrical animals)
    - Deuterostomia (deuterostomes)
      - Phylum Chordata (chordates)
        
        Craniata (craniates)
        
        Subphylum Vertebrata (vertebrates)
        
        Superclass Gnathostomata (jawed vertebrates)
        
        Euteleostomi (bony vertebrates)
        
        Class Sarcopterygii (lobe-finned fishes and terrestrial vertebrates)
        
        Tetrapoda (tetrapods)
        
        Amniota (amniotes)
        
        Class Reptilia (turtles, snakes, lizards, and relatives)
        
        Order Squamata
        
        Family Viperidae
        
        Genus Crotalus
        
        Species Crotalus molossus (Black Tailed Rattlesnake)
        
        Infraspecies Crotalus molossus estebanensis
        
        Infraspecies Crotalus molossus molossus
        
        Infraspecies Crotalus molossus nigrescens
        
        Infraspecies Crotalus molossus oaxacus