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)
Colubridae (family)
Colubrinae (subfamily)
Elaphe (genus)
Elaphe obsoleta (species)
[hide inferior taxa]
Elaphe obsoleta quadrivittata (subspecies)