Figure 4
From: Comparative neuroanatomy suggests repeated reduction of neuroarchitectural complexity in Annelida
Neuroanatomy of annelid representatives as revealed by a combination of immunohistochemistry (red) and cell nuclei labeling (blue). Schematic drawings depict a dorsal view of the head of the animal, with the brain outlined in red and clusters of small-diameter cells outlined in blue. Immunostainings were produced by the following antisera: anti-FMRFamide (a), anti-serotonin (b, c, d). The arrowhead points at the narrow neuropil band connecting both hemispheres of the brain in S. penicillus. ey eye. Scale bars: 100 μm.