Malacostracan, The nervous system and sensory organs

The malacostracan central nervous system consists, in primitive forms, of a ventral nerve cord and ganglia within each body segment. The supraesophageal ganglion innervates the eyes, antennules, and antennae, and the subesophageal ganglion innervates the mouthparts of the head region. In amphipods and anomuran decapods the ganglia of abdominal segments are