Taxonavigation

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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Classis: †Acanthodii
Ordo: †Climatiiformes
Subordo: †Climatiida
Familia: †Climatiidae
Genus: Parexus

References

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http://media.wiley.com/product_data/excerpt/17/04712503/0471250317.pdf