Invertebrate Notes
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Invertebrate Phyla:
Porifera-sponges | |||||||||||
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Cnidaria: | |||||||||||
![]() sea anemone |
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![]() Jellyfish |
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Platyhelminthes-flatworms | |||||||||||
![]() Fluke |
![]() Tapeworm |
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Nematoda-roundworms | |||||||||||
![]() Trichinella |
![]() Ascaris |
![]() Hookworms |
![]() Pinworms |
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Rotifera–rotifers | |||||||||||
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Annelida-segmented worms | |||||||||||
![]() earthworm |
![]() leech |
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Mollusca | |||||||||||
![]() clam |
![]() snail |
![]() octopus |
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Arthropoda | |||||||||||
Subphylum: Trilobita–trilobites (extinct) | Subphylum: Chelicerata-horseshoe crabs, spiders, scorpions, mites, & ticks | Subphylum: Mandibulata–crustaceans, insects, millipedes, centipedes | |||||||||
![]() Trilobite |
![]() Horseshoe crab |
![]() Millipede |
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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