Stelleroidea

Stelleroidea
Ochre Sea Star on beach at Olympic National Park
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Superclass:	Stelleroidea
Classes
Asteroidea Ophiuroidea Somasteroidea

Stelleroidea is a superclass of marine invertebrates including three classes:

• Asteroidea: true sea stars
• Ophiuroidea: brittle stars and basket stars
• Somasteroidea (sometimes also Stomasteroidea): ancestral stelleroids