1. Phylum Arthropoda
There are five main groups of Arthropods: horseshoe crabs, arachnids, crustaceans, centipedes and millipedes, and insects. ... Crustaceans are nearly all aquatic and consist of lobsters, crabs, shrimps, barnacles, etc. ... Major classes of Phylum Arthropoda are: Class Merostomata; Horseshoe crabs: Class Cephalocarida; small primitive shrimps discovered in 1955: Class Cirripeda; Barnacles: Class Insecta; insects: Class Chilopoda; Centipedes. ...
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- Grade Level: High School