You can search the complete taxonomic tree of the species in the database. Click "Phylum" to get back to to the starting point. The thumbnails show examples of the Class, Order etc.

Phylum	Class	Order	Family	Species
Echinodermata	Asteroidea	Valvatida	Acanthasteridae
Echinodermata	Asteroidea	Valvatida	Asterinidae
Echinodermata	Asteroidea	Valvatida	Goniasteridae
Echinodermata	Asteroidea	Valvatida	Ophidiasteridae
Echinodermata	Asteroidea	Valvatida	Oreasteridae