ichthyosauriform
genus Stenopterygius
phytosaurian
crocodilian reptile
crocodilian
dinosauriform
order Ichthyosauria
Ichthyosauria
ichthyosauromorph
eosauropterygian
protorothyridid
pythonomorph
proterochampsian
protorosaur
nothosaurid
dolichosaur
allokotosaur
pterodactyl
aphanosaur
herptile
reptile
pistosaurid
herp
hupehsuchian
dinocaridid
pleurosaur
phosphatocopid
pterosauromorph
pistosaur
kuehneosaur
captorhinid
drepanosaur
lysorophian
genus Compsognathus
neoichthyosaurian
russellosaurine
helodermatid
leanchoiliid
herpet-
neoichthyosaur
aigialosaurid
thalattosaur
drepanosauromorph
aigialosaur
squamate
stenopterygius
gephyrostegid
Stenopterygius quadrisicissus
romeriid
paleoherpetology