They belong to the Echinoidea, one of the five classes of the phylum Echinodermata, the others being holothurians, crinoids, starfish and brittlestars. Like all echinoderms, echinoids have a skeleton ...

They are a type of invertebrate called echinoderms and are also known as sea stars. These animals are in the Asteroidea class, which is the largest class in the Echinodermata family. They are ...

I appreciate the point of view of Drs Dupont and Thorndyke, but still insist that the wonderful regenerative capacities of the classes of echinoderms that were highlighted in their correspondence ...

They belong to the Echinoidea, one of the five classes of the phylum Echinodermata, the others being holothurians, crinoids, starfish and brittlestars. Like all echinoderms, echinoids have a skeleton ...