arthropterygium
Stenopterygius quadrisicissus
genus Ichthyosaurus
stenopterygius
thunnosaur
ichthyosaurian
neoichthyosaurian
arthropod genus
ophthalmosaurid
arachnomorph
stenopterygiid
neoichthyosaur
ichneumonidan
ichnomorphology
parvipelvian
Pallas's gull
ichthyornithid
genus Stenopterygius
ichthyosaurus
ichthyosaurid
leanchoiliid
ichnoassemblage
dinocaridid
ichthyosauromorph
anomalocarid
order Ichthyosauria
Ichthyosauria
euchelicerate
ichnotaxonomy
ichthyopterygian
hymenochirin
temnodontosaurid
archaeopterodactyloid
leptonectid
euornithopod
phosphatocopid
ichthyostegid
sea spider
hibbertopterid
Anarhichas
euarthropod
Mediterranean gull
eumaniraptoran
arachnoidid
genus Artamus
Artamus
genus Anarhichas
aromobatid
arthropodan
ornithocheiroid