This exercise illustrates the two major features that all members of the Phylum Echinodermata have in common - the water vascular system and pentaradial symmetry. The take home message is that all ...

all belong to the phylum Mollusca except one from the phylum Echinodermata, as reported by La Razón. Researchers believe these marine fossils were deliberately collected by Neanderthals ...

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 ...

But it actually belongs to the phylum of echinoderms, closely related to starfish (aka sea stars), sand dollars, sea urchins and sea lilies. Many sea cucumber species can be found in a variety of ...