Search Results for: Crustaceans not in shell
cephalocarida - horseshoe shrimps branchiopoda - brime shrimp maxillopoda - barnacles , fish lice, copepods , etc. ostracoda - seed shrimp malacostraca - lobsters , crabs , shrimp , etc. arthropods ( phylum arthropoda) are the largest phylum of animals and include the insects , arachnids , and crustaceans
some species, appendages are not present, but are assumed to have been lost during the course of evolution . all arthropods are covered by a hard exoskeleton, made out of protein and a tough polysaccharide called chitin . the exoskeleton provides support and protection. periodically, an arthropod sheds...
https://www.newworldencyclopedia.org/entry/Arthropod