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