Thoracostraca

• (a.) An extensive division of Crustacea, having a dorsal shield or carapec/ //niting all, or nearly all, of the thoracic somites to the head. It includes the crabs, lobsters, shrimps, and similar species.
Found on http://thinkexist.com/dictionary/meaning/thoracostraca/

Thoracostraca

Tho`ra·cos'tra·ca noun plural [ New Latin See Thorax , and Ostracoid , adjective ] (Zoology) An extensive division of Crustacea, having a dorsal shield or carapec... ......niting all, or nearly all, of the thoracic somites to the head. It includes th...
Found on http://www.encyclo.co.uk/webster/T/47
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