Starfish are echinoderms, a form of invertebrate marine animals known for radial symmetry and having spiny skin. Researchers said most animal species have similar genetic structures, prompting ...

Echinoderms such as starfish are unusual for their five-fold body symmetry. Maps of gene-expression patterns show how this body plan was acquired, and that the genes specifying head structures do ...

Sand dollars and kin are called spiny skinned animals and classified as echinoderms (from the Greek echinos = spines and derm = skin).

An ancient echinoderm fossil preserves evidence of tube feet like those found on today’s sea stars.

Scientists are retracing the journeys of century-old Antarctic expeditions to discover how the Earth has changed.

Echinoderms, Cnidarians, & The Gastropods That Parasitize Them Dr. M March 23, 2008 Aclidae Cerithiopsidae Cnidaria Crinoid Echinodermata Epitoniidae Eulimidae Fire Urchin Gasrtopod Janthina ...

This is a preview. Log in through your library . Abstract The new Class Coronoidea is proposed to include five genera of Ordovician-Silurian blastozoan echinoderms--Stephanocrinus, Mespilocystites, ...

Homalozoans include four classes of non-pentamerous Paleozoic echinoderms: Homostelea (cinctans), Ctenocystoidea (ctenoid-bearing homalozoans), Homoiostelea (solutes), and Stylophora (cornutes and ...

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 ...

The Great Marine Invertebrate Wars conclude, celebrating echinoderms' triumph at ScienceOnline'09, with sea cucumbers leading the charge!

Mollusks get both larger and smaller than all the Echinoderms and they are more diverse both in terms of number of species and the ecological niches they fill. If you don’t believe me that Mollusks ...