Difference between revisions of "Echinoderms"
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{{Definition|title=Echinodermata, echinoderms | {{Definition|title=Echinodermata, echinoderms | ||
| − | |definition= phylum of marine coelomate animals that are bilaterally symmetrical as larvae but show five-rayed symmetry as adults and have a calcareous endoskeleton and a water vascular system. It includes the classes Crinoidea (sea lilies and feater stars), Asteroidea (starfish), [[Ophiuroidea]] (brittle stars), [[Echinoidea]] (sea urchins) and Holothuroidea (sea cucumbers).<ref name="Hendersons"> Lawrence, E. (2005). ''Henderson’s dictionary of biology.'' Pearson Education Limited, 13th ed., Harlow. 748 p. </ref>}} | + | |definition= phylum of marine coelomate animals that are bilaterally symmetrical as larvae but show five-rayed symmetry as adults and have a calcareous endoskeleton and a water vascular system. It includes the classes Crinoidea (sea lilies and feater stars), Asteroidea (starfish), [[Ophiuroid|Ophiuroidea]] (brittle stars), [[Echinoid|Echinoidea]] (sea urchins) and Holothuroidea (sea cucumbers).<ref name="Hendersons"> Lawrence, E. (2005). ''Henderson’s dictionary of biology.'' Pearson Education Limited, 13th ed., Harlow. 748 p. </ref>}} |
==References== | ==References== | ||
<references/> | <references/> | ||
Revision as of 13:05, 2 October 2007
Definition of Echinodermata, echinoderms:
phylum of marine coelomate animals that are bilaterally symmetrical as larvae but show five-rayed symmetry as adults and have a calcareous endoskeleton and a water vascular system. It includes the classes Crinoidea (sea lilies and feater stars), Asteroidea (starfish), Ophiuroidea (brittle stars), Echinoidea (sea urchins) and Holothuroidea (sea cucumbers).[1]
This is the common definition for Echinodermata, echinoderms, other definitions can be discussed in the article
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References
- ↑ Lawrence, E. (2005). Henderson’s dictionary of biology. Pearson Education Limited, 13th ed., Harlow. 748 p.
