
Dictionary » T » Thoracostraca Thoracostracathoracostraca (Science: 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 the crabs, lobsters, shrimps, and similar species. Origin: NL. See Thorax, and Ostracoid. ![]()
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