NMDA R1 receptor distribution in the cyprid of Balanus amphitrite (=Amphibalanus amphitrite) (Cirripedia, Crustacea)

▶ Glutamate receptor immunoreactivity was observed in neuromuscular junctions. ▶ Immunoreactivity was observed in ommatidia, epithelial cells and antennules. ▶ Glutamate could play a neuromuscular, sensory or non-neural role. ▶ Comparable glutamate/GABA receptors pattern distribution suggested their coordinated function.