Invertebrate Notes
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Invertebrate Phyla:
Porifera-sponges | |||||||||||
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Cnidaria: | |||||||||||
![]() sea anemone |
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| ![]() 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