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