Path
rootcellular organisms
eukaryota
opisthokonta
metazoa
eumetazoa
bilateria
coelomata
deuterostomia
chordata
craniata
vertebrata
gnathostomata
teleostomi
euteleostomi
sarcopterygii
tetrapoda
amniota
sauropsida
sauria
lepidosauria
squamata
scleroglossa
serpentes
colubroidea
viperidae
crotalinae
agkistrodon
agkistrodon contortrix
agkistrodon contortrix laticinctus