Animal Diversity Web

Echinodermata

sea stars, sea urchins, sea cucumbers, and relatives

(Also: echinoderms)

Kingdom Animalia (animals)
- Eumetazoa (metazoans)
  - Bilateria (bilaterally symmetrical animals)
    - Deuterostomia (deuterostomes)
      - Echinodermata (sea stars, sea urchins, sea cucumbers, and relatives)
        
        Class Asteroidea
        
        Class Crinoidea
        
        Class Echinoidea
        
        Class Holothuroidea
        
        Class Ophiuroidea
        
        Class Somasteroidea