Common Invertebrate Groups

Arachnids   class Arachnida No wings, 8 legs. Includes spiders, mites, ticks, scorpions.	Insects  class Insecta Biggest group. 6 legs. Head, thorax, abdomen. Includes flies, bees, ants, butterflies, beetles, etc.
Molluscs   phylum Mollusca Soft bodies, often with a hard outer shell. Includes snails, slugs, clams, oysters, octopus.	Segmented Worms  phylum Annelida Segmented worms. Includes earthworms and leeches.
Centipedes & Millipedes  class Myriapoda Long body with many segments and many legs. Includes centipedes and millipedes.	Crustaceans  class Crustacea Hard shell cover, two pairs of antennae. Includes crabs, shrimp, lobsters, barnacles.

More Resources

Invertebrates at the Hastings Reserve Insects at the Sagehen Reserve