ozobranchid
alligatorid
herpetology
dortokid
podocnemid
testudinate
tortoiseshell
Dermochelyidae
Chelydra
luth
family Elapidae
Elapidae
family Dermochelyidae
testudinoid
genus Chelydra
turn turtle
thalassochelydian
family Kinosternidae
Kinosternidae
trionychian
undershell
reptile family
leaf turtle
trionychid
genus Gerrhonotus
subclass Lepidosauria
Lepidosauria
Gerrhonotus
mugger crocodile
yacare
platysternid
turtlet
Chinese alligator
pleurodiran
sandownid
Crotaphytus
Calliophis
anapsid
Trionychidae
genus Callophis
Black Tortoise of the North
genus Chelonia
genus Calliophis
leatherback
genus Crotaphytus
Callophis
pond turtle
family Trionychidae