ophthalmosaurid
arthropterygium
leptonectid
genus Ichthyosaurus
ophthalmosaur
arachnoidid
neoichthyosaurian
ichnomorphology
ichthyosaurian
stenopterygiid
arachnomorph
ichthyornithid
neoichthyosaur
thunnosaur
ichnoassemblage
Stenopterygius quadrisicissus
stenopterygius
ichthyosaurid
ichneumonidan
ichnotaxonomy
leanchoiliid
opabinid
ichthyosaurus
omphalotrochid
ichthyostegid
Ichthyosauria
order Ichthyosauria
ichthyodectid
anomalocarid
Ophiodon
aspidorhynchid
genus Ophiodon
genus Stenopterygius
mixosaurid
ichneumonid
genus Steganopus
Euphagus
genus Euphagus
genus Lobipes
Steganopus
Lobipes
arthropod genus
palaeozygopleurid
scelidosaurid
eutherocephalian
epizoanthid
dinocaridid
opisthomonorchiine
proterosuchid
stephanoceratoid