Common Invertebrate Groups

phylum  Mollusca
Soft bodies, often with a hard outer shell. Includes snails, slugs, clams, oysters, octopus.


slugs
snails
phylum  Annelida
Segmented worms. Includes earthworms and leeches.


earthworms
class  Myriapoda
Long body with many segments and many legs. Includes centipedes and millipedes.


centipedes
2 legs per segment
millipedes
4 legs per segment
class  Crustacea
Hard shell cover, two pairs of antennae. Includes crabs, shrimp, lobsters, barnacles.


crayfish
pill bugs
class  Arachnida
No wings, 8 legs. Includes spiders, mites, ticks, scorpions.


mites


spiders


ticks


scorpions

class  Insecta
Biggest group. 6 legs. Head, thorax, abdomen. Includes flies, bees, ants, butterflies, beetles, etc.


larvae
moths & butterflies

beetles
dragonflies

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Last updated: Nov 8, 2006