The cytology of the posterior lateral line lobe of high‐frequency weakly electric fish (gymnotidae): Dendritic differentiation and synaptic specificity in a simple cortex

The posterior lateral line lobe of two high‐frequency weakly electric fish, Apteronotus albifrons and Eingenmannia viriscens, was studied at the electron microscopic level. The various cell types previously described by light microscopy (Maler, ′79) were identified on the basis of their unique position or by combined Golgi‐EM. Afferent input to the posterior lobe was identified either by its location and generally accepted characteristics, e.g., parallel fibers in the molecular layer, or by making appropriate lesions and noting the degenerating terminals, e.g., primary electroreceptive afferents.