The species diversity of Cumacea increases with depth.

Anatomy

Cumaceans have a strongly enlarged cephalothorax with a carapace, a slim abdomen, and a forked tail. The length of most species varies from 1 to 10 mm.

The carapace of a typical cumacean is composed of several fused dorsal head parts and the first three somites of the thorax. This carapace

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