Phylum Arthropoda Subphylum Crustacea Class Malacostraca Order Lophogastrida Number of families 2
Small shrimplike marine crustaceans with elongate carapaces covering, but not fused to, all thoracic somites (segments); stalked eyes; and strongly developed swimming legs on the first five abdominal somites
Illustration: Giant red mysid (Gnathophausia ingens). (Illustration by John Megahan)
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