(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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). thoracostraca. Retrieved September 22, 2026, from http://smartdefine.org/thoracostraca/definitions/2072201 |
| Chicago | Webster's. 2011. "thoracostraca" http://smartdefine.org/thoracostraca/definitions/2072201 (accessed September 22, 2026). |
| Harvard | Webster's 2011, thoracostraca, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/thoracostraca/definitions/2072201>. |
| MLA | Webster's. "thoracostraca" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/thoracostraca/definitions/2072201> |