Title |
Immunolocalization of serotonin in Onychophora argues against segmental ganglia being an ancestral feature of arthropods
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Published in |
BMC Ecology and Evolution, July 2007
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DOI | 10.1186/1471-2148-7-118 |
Pubmed ID | |
Authors |
Georg Mayer, Steffen Harzsch |
Abstract |
Onychophora (velvet worms) represent the most basal arthropod group and play a pivotal role in the current discussion on the evolution of nervous systems and segmentation in arthropods. Although there is a wealth of information on the immunolocalization of serotonin (5-hydroxytryptamine, 5-HT) in various euarthropods, as yet no comparable localization data are available for Onychophora. In order to understand how the onychophoran nervous system compares to that of other arthropods, we studied the distribution of serotonin-like immunoreactive neurons and histological characteristics of ventral nerve cords in Metaperipatus blainvillei (Onychophora, Peripatopsidae) and Epiperipatus biolleyi (Onychophora, Peripatidae). |
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