Bilaterally Symmetric Invertebrates
Animals
Existence
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Ecdysozoa
(Taxonomic Rank: Superphylum)
(Taxonomic Rank: Superphylum)
Insects, mites, scorpions, spiders, crabs, lobsters, crayfish, shrimp, prawns, sea spiders, centipeds, millipeds, seed shrimp, horseshoe crabs, barnacles, trilobites, and sea scorpions. Tardigrada Nematoda Priapulida Kinorhyncha Arthropoda Loricifera Basal Ecdysozoans Nematomorpha Onychophora