Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Echinodermata
Subphylum: Eleutherozoa
Superclassis: Cryptosyringida
Classes: Echinoidea - Holothuroidea - Ophiuroidea
Retrieved from "http://en.wikipedia.org/"
All text is available under the terms of the GNU Free Documentation License