The tegumental sensory organ and nervous system of Derocheilocaris typica (Crustacea: Mystacocarida)

The central nervous system is described in detail including an electron microscopic analysis and our results are compared to an earlier light microscopic study. Nervous structures, not described before, are the stomatogastric nervous system, the abdominal ganglia, segmental nerves, a dorsal ganglion in the telson, and a 'neurohemal' organ in the thoracic ganglia. The brain organization is reinterpreted and it is characterized by its low degree of specialization.