| The fusion of the cephalic segments is most obvious when a cephalic shield or carapace is present. |
| A nauplius consists of the first three cephalic segments and the appendages belonging to those segments, the antennules, antennae, and mandibles. |
| All dorsal sclerites are in close articulation and there are no gaps along cephalic sutures. |
| It may pass over the clavicle and open into the cephalic, subclavian, or internal jugular. |
| While resting in burrows or slight crevices, Pherusa extends its cephalic cage, grooved paired pales, and branchiae into the current. |
| Naupli have a cephalic shield or the beginnings of the dorsal carapace, and no segmentation on the trunk. |
