News All News Newsletter Recent Grants Back to main menu Overview Grant Awards 2022-23 Accolades Publications Media Information Social Media Information Science Communication Resources for Scientists Obituaries Home All News March Madness: Ecdysozoan Division By Emily Greenhalgh March 19, 2021 Share Articles Categories Spotlight Ecdysozoans are the largest group within the animal kingdom and comprises arthropods (insects, spiders, and crustaceans), as well as nematodes such as roundworms. All organisms in the Ecdysozoan superphylum have an exoskeleton and shed or molt that cuticle layer in order to grow. Unlike the animals in the Deuterostome Division, organisms within Ecdysozoa all develop the mouth first during embryonic development. Meet the Members of the Ecdysozoan Division Beach Hopper (Parhyale hawaiensis) Lobster (Homarus americanus) Atlantic Horseshoe Crab (Limulus polyphemus) Sea Spider (Pycnogonida pantopoda) Explore the Other Divisions Lophotrochozoan Division Deuterostome Division Non-Bilaterian Division What is March Madness? Based on the March Madness NCAA basketball tournament, during March Madness, popular organisms face off for your votes. YOU have the opportunity to decide what organism is crowned victorious by voting for your favorite organisms in a series of head-to-head match-ups. Voting will take place on the social media channels. Support science. Support the . Share Articles