Phylum Echinodermata consists of invertebrate marine species generally characterized by spiny skin. Echinoderms are exclusively marine, bottom dweller and few living on surfaces. There are about 7,000 living species of Echinodermata which are divided into 5 classes. They are classified based on shape or position of madreporite (water inlet pore) & characteristic of their digestive system.
Examples of Echinoderms with their common name & class are listed below (with images).
1. Asterias
Common name: Star Fish or Sea Star
Class: Asteroidea
Read also: Examples of mollusca
2. Astropecten
Common name: Royal Starfish
Class: Asteroidea
3. Pentaceros
Common name: Sea Pentagon
Class: Asteroidea
4. Ophiothrix
Commonly name: Brittle Star
Class: Ophiuroidea
5. Ophiolepis
Common name: Brittle Star
Class: Ophiuroidea
6. Gorgonoephalus
Common name: Basket Star
Class: Ophiuroidea
7. Echinus
Common name: Sea Urchin
Class: Echinoidea
8. Clypeaster
Common name: Cake Urchin
Class: Echinoidea
9. Echinocardium
Common name: Heart Urchin
Class: Echinoidea
10. Holothuria
Common name: Sea Cucumber
Class: Holothuroidea
11. Cucumaria
Common nameL: Sea Cucumber
Classs: Holothuroidea
12. Antedon
Common name: Sea Lily or feather Star
Class: Crinoidea
Images source: wikipedia
