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thoracostraca |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Thoracostraca \Tho`ra*cos"tra*ca\, n. pl [NL. See {Thorax}, and {Ostracoid}, a.] (Zo["o]l.) 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.
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