shastasaurid
stenopterygiid
ichthyosaurus
neoichthyosaur
thunnosaurian
neoichthyosaurian
ichthyosaurian
ichthyodectid
leptonectid
genus Stenopterygius
ichthyosaurid
temnodontosaurid
genus Ichthyosaurus
stenopterygius
Stenopterygius quadrisicissus
ichthyosauromorph
baracromian
nothosaurid
leptocleidid
aigialosaur
Ichthyosauria
order Ichthyosauria
ornithocheirid
pseudorthoceratid
thunnosaur
parvipelvian
ichthyophiid
silesaurid
arthropterygium
pterothecid
dolichosaurid
notosuchid
shumarditid
protorosaur
phytosaurian
anatoliadelphyid
uraeotyphlid
nyctosaurid
ophthalmosaurid
palaeobatrachid
dinosauriform
sternophorid
anomalocarid
phosphatocopid
trilophosaurid
mimotonid
thalattosuchian
aegyptosuchid
ornithocheiroid
stryacocephalid