Phylum Arthropoda Subphylum Crustacea Class Malacostraca Order Cumacea Number of families 8

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Cumaceans are quickly recognizable by their large carapace, which covers the first three thoracic somites and narrow abdomen. The first thoracic appendage is modified as a maxilliped, which has both feeding and respiratory functions.

Illustration: Diastylis sculpta. (Illustration by Dan Erickson)

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