Summary
Serotonin-immunoreactive neurons in the brain of Tenebrio molitor L. have been demonstrated and mapped throughout metamorphosis. Most serotonin-immunoreactive brain neurons persist throughout metamorphosis; their fate can be followed during development because of their characteristic cell body locations and arborization patterns. The detailed morphology of the persisting neurons, however, changes during metamorphosis, probably to accommodate architectural changes of the different brain centers. Serotonin-immunoreactivity in the optic lobes allows a subset of neurons that is newly differentiated during metamorphosis to be identified. Phylogenetic homology of serotonin-immunoreactive brain interneurons of different insect species is discussed. The serotonin-immunoreactive brain neurons comprise a phylogenetically conserved neuronal population. Serial homologous abdomino-thoracic and brain serotonin-immunoreactive neurons were characterized, allowing a comparison of some basic structural features of these neurons.
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Breidbach, O. Serotonin-immunoreactive brain interneurons persist during metamorphosis of an insect: a developmental study of the brain of Tenebrio molitor L. (Coleoptera). Cell Tissue Res 259, 345–360 (1990). https://doi.org/10.1007/BF00318458
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DOI: https://doi.org/10.1007/BF00318458