Classification
Six subclasses are generally recognised, although many works have further included the ostracods among the Maxillopoda. Of the six groups, only Mystacocarida are entirely free-living; all the members of the Tantulocarida, Pentastomida and Branchiura are parasitic, and many of the Copepoda and Thecostraca are parasites.
| Subclass | Members | Photo |
|---|---|---|
| Copepoda | Calanoida Cyclopoida Gelyelloida Harpacticoida Misophrioida Monstrilloida Mormonilloida Platycopioida Poecilostomatoida Siphonostomatoida |
Calocalanus pavo (Calanoida: Calocalanidae) |
| Thecostraca | Cirripedia (barnacles) Facetotecta Ascothoracida |
Chthamalus stellatus (Sessilia: Chthamalidae) |
| Branchiura | Arguloida (fish lice) † Cyclida |
Argulus on a stickleback (Argulidae) |
| Pentastomida (tongue worms) |
Cephalobaenida Porocephalida |
Armillifer armillatus (Porocephalidae) |
| Mystacocarida | Ctenocheilocaris Derocheilocaris |
Ctenocheilocaris (Derocheilocarididae) |
| Tantulocarida | Basipodellidae Deoterthridae Doryphallophoridae Microdajidae |
Read more about this topic: Maxillopoda