How does the branchiopod nervous system connect the brain to the trunk?

The branchiopod nervous system connects the brain—also known as the cerebral ganglion—to the trunk via two chains of ventral ganglia that run along the body underneath the gut.1

The specific organization of these connections varies by body type:

• Anostracans: The two chains of ventral ganglia are cross-connected in each segment, creating a ladder-like structure.1
• Short-bodied forms: In groups such as anomopods and onychopods, the ventral nervous system is condensed into a single mass.1

From these ganglia, nerves extend to supply the various mouthparts and limbs of the animal.1