Invertebrate
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This is the current revision of Invertebrate as edited by ChuckD2010 (Talk | contribs) at 01:05, July 2, 2010. This URL is a permanent link to this version of this page.
An invertebrate (in contrast to a vertebrate), is an animal with no spine.[1]
Most living animals are invertebrates, including arthropods, molluscs, and annelids.
The phyla contained in Invertebrata are:
- Protozoa - Mostly simple, single-celled organisms
- Porifera - Sponges
- Coelenterata - Hydra, jellyfish, anemones and corals
- Echinoderma - Starfish, sea urchins and sea cucumbers
- Annelida - Worms
- Brachiopoda - Bivalves, such as mussels and clams
- Polyzoa - Single celled critters that usually form colonies
- Mullusca - Whelks, ammonites, cuttlefish, squids, snails, etc.
- Arthropoda - Crustaceans, insects, arachnids, trilobites, etc.[2]
