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| | Taxonomy |
 | | It can be argued that Maxillopoda should actually be dissolved into its four subclasses, Copepoda, Thecostraca, Tantulocarida and Mystacocarida, to make nine classes of crustaceans, but it is generally kept as a whole. |
 | | It is then broken down slightly differently, changing the number of orders to 42 and families to 849. |
 | | It is further divided into six subclasses: Thecostraca (including Cirripedia, formerly separated), Tantulocarida, Branchiura, Pentastomida, Mystacocarida, and Copepoda. |
| www.personal.psu.edu /users/e/i/eim104/taxonomy.htm (838 words) |
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