longipinnate
latipinnate
hindfin
ichthyopterygian
ornithischian
ornithischian dinosaur
turtle
ichthyosauriform
Ichthyosauria
order Ichthyosauria
stegosaurus
stegosaur
Stegosaur stenops
Stenopterygius quadrisicissus
stenopterygius
macronarian
macroarthropod
forefin
choristoderan
dinosaurian
scansoriopterygid
pincer
nipper
claw
chela
metacoxa
hadrosauriform
saurischian
saurischian dinosaur
euornithopod
sauropod dinosaur
instar
sauropod
arthropterygium
temnodontosaurid
leanchoiliid
flying frog
leptoceratopsid
mixosaurid
scansoriopterigid
Arthropoda
phylum Arthropoda
lamprey eel
procoxa
megalosaur
pinnatiped
dinosaurlike
Uintatheriidae
family Uintatheriidae
pinniped