protorosaur
Erethizon
archaeopterodactyloid
dinosauromorph
nectridean
anomphalid
thescelosaur
palaeobatrachid
lobopod
anteosaur
emydopoid
arthropodian
trematosaur
Uintatheriidae
family Uintatheriidae
anchomomyin
eryonid
anchitheriine
leptonectid
thunnosaurian
genus Ancylus
longidorid
eudromaeosaur
therizinosauroid
notharctid
omomyine
eutherocephalian
abelisauroid
eudromaeosaurian
anthracosaur
tanystropheid
Stenopterygius quadrisicissus
dolichosaurid
order Ichthyosauria
adapiform
Ichthyosauria
neotheropodan
stenopterygius
Ancylus
hibbertopterid
entomolite
king cricket
cribricyath
pseudorthoceratid
euomphalid
anthracothere
blastoid
ichthyostegid
atoposaurid
afropithecine