Invertebrate Notes
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Invertebrate Phyla:
| Porifera-sponges | |||||||||||
|  | ||||||||||
| Cnidaria: | |||||||||||
 sea anemone |
|
|  Jellyfish | ||||||||
| Platyhelminthes-flatworms | |||||||||||
 Fluke |  Tapeworm | ||||||||||
| Nematoda-roundworms | |||||||||||
 Trichinella |  Ascaris |  Hookworms |  Pinworms | ||||||||
| Rotifera–rotifers | |||||||||||
 |  | ||||||||||
| Annelida-segmented worms | |||||||||||
 earthworm |  leech | ||||||||||
| Mollusca | |||||||||||
 clam |  snail |  octopus | |||||||||
| Arthropoda | |||||||||||
| Subphylum: Trilobita–trilobites (extinct) | Subphylum: Chelicerata-horseshoe crabs, spiders, scorpions, mites, & ticks | Subphylum: Mandibulata–crustaceans, insects, millipedes, centipedes | |||||||||
 Trilobite |  Horseshoe crab |  Millipede | |||||||||
| Echinodermata: starfish, sea cucumbers, sea lilies | |||||||||||
 Starfish |  Sea Cucumber |  Sea Lily | |||||||||
About 97% of all animals are invertebrates. Invertebrates are animals which do not have a backbone. There are nine phyla of invertebrates: Porifera, Cnidaria, Platyhelminthes, Nematoda, Rotifera, Mollusca, Annelida, Arthropoda, & Echinodermata.
Sponges