Ultrastructure of Teleost Retina II: Interstitial Amacrines, Dislocated Amacrines, Ganglion Cells, Müller Fiber, Oligodendroglia, Adrenergic Terminals, Inner Plexiform Layer, Glycogen Cytochemistry

Aims: To analyze the ultrastructure of internal interstitial amacrine cell, dislocated amacrine cell, ganglion cells, oligodendroglia, Müller cells, in MT2 ultramicrotome and with periodic acid for Retinal morphology revealed external interstitial amacrine cells as the most voluminous cell above inner plexiform layer. Dislocated amacrine cells described by the first time, localized at the inner plexiform layer, had clear cytoplasm, few ribosomes, few vesicles of rough endoplasmic reticulum and elongated mitochondria with clear matrix. Dark and clear amacrine piriform cells were characterized by glycogen density, and their functional contacts described. External horizontal cells, dark piriform amacrines, stellate amacrines and Müller cells exhibited the highest glycogen concentration in teleost fish retina. Conclusion: This paper is a comprehensive analysis of ultrastructure of five retinal cells, adrenergic terminals inner plexiform layer and glycogen distribution in the retina, finding one new cell, the dislocated amacrine cell and also describing the amacrine interstitial external cell the most voluminous cell in teleost retina.