Difference between revisions of "Invertebrate"
Jump to navigation
Jump to search
(Change link target) |
m (fixing link) |
||
| Line 8: | Line 8: | ||
*[[Porifera]] - [[Sea sponge|Sponge]]s | *[[Porifera]] - [[Sea sponge|Sponge]]s | ||
*[[Coelentera]] - Hydra, [[jellyfish]], [[sea anemone|anemones]] and [[coral]]s | *[[Coelentera]] - Hydra, [[jellyfish]], [[sea anemone|anemones]] and [[coral]]s | ||
| − | *[[Echinoderm]]a - [[Starfish]], [[sea urchin]]s and [[sea cucumber]]s | + | *[[echinoderms|Echinoderm]]a - [[Starfish]], [[sea urchin]]s and [[sea cucumber]]s |
*[[Annelid]]a - [[Worm]]s | *[[Annelid]]a - [[Worm]]s | ||
*[[Brachiopod]]a - [[Bivalve]]s, such as [[mussel]]s and [[clam]]s | *[[Brachiopod]]a - [[Bivalve]]s, such as [[mussel]]s and [[clam]]s | ||
Revision as of 17:39, November 7, 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, anemones 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)