the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Gnathostomata (superclass)
Sarcopterygii (class)
Tetrapoda (no rank)
Amniota (no rank)
Sauropsida (no rank)
Sauria (no rank)
Lepidosauria (superorder)
Squamata (order)
Serpentes (suborder)
Colubroidea (superfamily)
Viperidae (family)
Crotalinae (subfamily)
Crotalus (genus)
Crotalus durissus (species)
tropical rattlesnake (primary common name)
[hide inferior taxa]
Crotalus durissus cascavella (subspecies)
Crotalus durissus collilineatus (subspecies)
Crotalus durissus cumanensis (subspecies)
Crotalus durissus durissus (subspecies)
Crotalus durissus ruruima (subspecies)
Crotalus durissus terrificus (subspecies)