caa a22 4500 463255275 CHVBK 20180405153353.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s00435-007-0039-z doi (NATIONALLICENCE)springer-10.1007/s00435-007-0039-z The nervous system of Convolutriloba (Acoela) and its patterning during regeneration after asexual reproduction [Elektronische Daten] [Christian Gaerber, Willi Salvenmoser, Reinhard Rieger, Robert Gschwentner] We describe the serotonergic and cholinergic nervous system of the asexually reproducing acoel Convolutriloba longifissura Bartolomaeus & Balzer, 1997 by means of immunohistochemistry, conventional histochemistry and transmission electron microscopy. Immunocytochemical staining for serotonin revealed neurons in the brain, in a pair of ventral main longitudinal cords, in two pairs of smaller dorsal longitudinal nerve cords, and in a submuscular nerve net. The brain comprises a ventral-anterior commissure and a less intensely stained dorsal commissure joined together by connectives into a three-ringed scaffold from which the longitudinal nerves extend. We followed the regeneration of the serotonergic part of the nervous system up to the second day after fission. Within this time period, the offspring reestablished bilateral symmetry in the nervous system and developed full motor control. The presence of aminergic cell bodies associated with the main lateral nerve cords of C. longifissura shows that the acoelan nervous system is more similar to that of other platyhelminths (triclads, rhabditophorans) than previously assumed. The presence of serotonergic cell bodies along the main nerve cord correlates with the capacity for asexual reproduction via fissioning. We also describe the single fission mode of C. hastifera Winsor 1990, which brings the modes of asexual reproduction employed by members of the Convolutrilobinae to three. Springer-Verlag, 2007 Serotonin nationallicence Acetylcholin nationallicence Platyhelminthes nationallicence 5-HT nationallicence Architomy nationallicence Gaerber Christian Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut Salvenmoser Willi Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut Rieger Reinhard Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut Gschwentner Robert Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut Zoomorphology Springer-Verlag 126/2(2007-08-01), 73-87 0720-213X 126:2<73 2007 126 435 https://doi.org/10.1007/s00435-007-0039-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00435-007-0039-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gaerber Christian Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Salvenmoser Willi Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Rieger Reinhard Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut NATIONALLICENCE 700 1- Gschwentner Robert Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria aut NATIONALLICENCE 773 0- Zoomorphology Springer-Verlag 126/2(2007-08-01), 73-87 0720-213X 126:2<73 2007 126 435 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer