Difference between revisions of "Invertebrate"
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[[Shark]]s and [[ray]]s are a special class under this description, since they do not have bony [[skeleton]]s, and hence no spine. They do, however, have a similar structure to vertebrates. They are called [[notochord]]s. | [[Shark]]s and [[ray]]s are a special class under this description, since they do not have bony [[skeleton]]s, and hence no spine. They do, however, have a similar structure to vertebrates. They are called [[notochord]]s. | ||
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| + | The phyla contained in Invertebrata are: | ||
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| + | *[[Protozoan|Protozoa]] - Mostly simple, single-celled organisms | ||
| + | *[[Porifera]] - [[Sea sponge|Sponge]]s | ||
| + | *[[Coelentera]] - Hydra, [[jellyfish]], [[sea anenome|anenomes]] and [[coral]]s | ||
| + | *[[Echinoderm]]a - [[Starfish]], [[sea urchin]]s and [[sea cucumber]]s | ||
| + | *[[Annelid]]a - [[Worm]]s | ||
| + | *[[Brachiopod]]a - [[Bivalve]]s, such as [[mussel]]s and [[clam]]s | ||
| + | *[[Polyzoa]] - Single celled criiters that usually form colonies | ||
| + | *[[Mullusc]]a - [[Whelk]]s, [[ammonite]]s, [[cuttlefish]], [[squid]]s, [[snail]]s, etc. | ||
| + | *[[Arthropod]]a - [[Crustacean]]s, [[insect]]s, [[arachnid]]s, [[trilobite]]s, etc.<ref>Invertebrate Paleontology, Henry Woods, Cambridge University Press, 8th Edition (1946)</ref> | ||
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| + | ==References== | ||
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| + | <references/> | ||
[[Category:Biology]] | [[Category:Biology]] | ||
[[Category:Animals]] | [[Category:Animals]] | ||
Revision as of 21:22, April 29, 2007
An invertebrate (in contrast to a vertebrate), is an animal with no spine. Most living things are invertebrates, including arthropods, molluscs, and bacteria.
Sharks and rays are a special class under this description, since they do not have bony skeletons, and hence no spine. They do, however, have a similar structure to vertebrates. They are called notochords.
The phyla contained in Invertebrata are:
- Protozoa - Mostly simple, single-celled organisms
- Porifera - Sponges
- Coelentera - Hydra, jellyfish, anenomes and corals
- Echinoderma - Starfish, sea urchins and sea cucumbers
- Annelida - Worms
- Brachiopoda - Bivalves, such as mussels and clams
- Polyzoa - Single celled criiters that usually form colonies
- Mullusca - Whelks, ammonites, cuttlefish, squids, snails, etc.
- Arthropoda - Crustaceans, insects, arachnids, trilobites, etc.[1]
References
- ↑ Invertebrate Paleontology, Henry Woods, Cambridge University Press, 8th Edition (1946)