
Cumacea is an order of small marine crustaceans of the superorder Peracarida, occasionally called hooded shrimp or comma shrimp. Their unique appearance and uniform body plan makes them easy to distinguish from other crustaceans. They live in soft-bottoms such as mud and sand, mostly in the marine environment. There are more than 1,500 of species ...
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http://en.wikipedia.org/wiki/Cumacea

• (n. pl.) An order of marine Crustacea, mostly of small size.
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http://thinkexist.com/dictionary/meaning/cumacea/
Cu·ma'ce·a noun plural [ New Latin ]
(Zoology) An order of marine Crustacea, mostly of small size.
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http://www.encyclo.co.uk/webster/C/201

Cumacea is an order of crustaceans of the sub-class Malacostraca where the carapace is small exposing four or five of the thoracic segments. The abdomen is slender.
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http://www.probertencyclopaedia.com/browse/BCA.HTM
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