CLSM analysis of serotonin-immunoreactive neurons in the central nervous system of Nais variabilis, Slavina appendiculata and Stylaria lacustris (Oligochaeta: Naididae)

The organization of the nervous system and the distribution of serotoninergic neurons were analysed in three species of Naididae using immunohistochemical labelling methods in conjunction with confocal laser-scanning microscopy. In the posterior region of the ventral nerve cord the serotoninergic ne...

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Published inHydrobiologia Vol. 406; pp. 223 - 233
Main Authors HESSLING, R, MÜLLER, M. C, WESTHEIDE, W
Format Conference Proceeding Journal Article
LanguageEnglish
Published Dordrecht Springer 01.07.1999
Springer Nature B.V
Subjects
Annelida and closely related phyla: sipuncula. Echiura. Nemertinea
Biological and medical sciences
Central nervous system
Freshwater
Fundamental and applied biological sciences. Psychology
Invertebrates
Nais variabilis
Nervous system
Relocation
Slavina appendiculata
Stylaria lacustris
Immunohistochemistry
Benthic organism
Serotonin
Taxonomy
Interspecific comparison
Central nervous system
Chemotaxonomy
Phylogeny
Annelida
Oligochaeta
Freshwater environment
Serotoninergic neuron
Neurotransmitter
Naididae
Invertebrata
Localization
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Summary:The organization of the nervous system and the distribution of serotoninergic neurons were analysed in three species of Naididae using immunohistochemical labelling methods in conjunction with confocal laser-scanning microscopy. In the posterior region of the ventral nerve cord the serotoninergic neurons are arranged in an alternating pattern in successive ganglia, clearly different from the pattern in the anterior neuromeres. This unique arrangement of 5HT-neurons is presumably an autapomorphic character of the Naididae or at least of a subtaxon including these three species. In all three species the cerebral ganglion is located in segments behind the prostomium, as has previously been found in terrestrial oligochaetes, where the relocation of the brain from the initially anterior position in the prostomium into the following segments can be explained as a functional adaptation to a life spent burrowing through comparatively firm substrates. This structural correspondence is regarded as an indication that the Naididae, being typical limnic oligochaetes, are derived from a terrestrial form.[PUBLICATION ABSTRACT]
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0018-8158
1573-5117
DOI:10.1023/A:1003704705181