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The ophiuroidea are a subclass of stelleroidea. They are the brittle stars. They have a flattened body clearly marked into two regions; the disc and the arms. Tube feet extend from the under surface of the arms, but the groove is closed to form a tube. Locomotion is chiefly by muscular movement of the arms assisted by the feet.
 Research Ophiuroidea
The stelleroidea are a class of Phylum echinodermata. They are the starfishes and brittle stars. They have a five-rayed symmetry clearly indicated by 'arms' which radiate out from the centre of the body. The mouth is on the lower side of the flattened body.
Research Stelleroidea
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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