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Flatworm asexual multiplication implicates stem cells and regeneration
It is argued that the presence of a population of totipotent or pluripotent stem cells, "neoblasts", is a primitive feature of decisive importance for the developing potential of flatworms. Expand
Evolution of the nervous system in Paraphanostoma (Acoela)
The evolution of the nervous system in Paraphanostoma (Acoela) is described in detail in Raikova, O. & Jondelius, U. (2004). Expand
Basiepidermal nervous system in Nemertoderma westbladi (Nemertodermatida): GYIRFamide immunoreactivity.
- O. Raikova, M. Reuter, M. Gustafsson, A. Maule, D. Halton, U. Jondelius
- Biology, Medicine
- 16 March 2004
The study demonstrates that the nemertodermatid NS possesses a number of plesiomorphic features and appears more primitive than the NS in other worms, except the Xenoturbellida. Expand
A commissural brain! The pattern of 5-HT immunoreactivity in Acoela (Plathelminthes)
The unique commissural brain and cordal nervous system found in A coela support the view of a deep gap lying between Acoela and other Plathelminthes. Expand
Development of the nervous system in Dugesia tigrina during regeneration after fission and decapitation
Results indicate that two processes are involved in the formation of the new cerebral ganglion of Dugesia tigrina, where 5-HT-IR cells appear before NPF- IR cells, in contrast to the pharynx where NPF/IR cells differentiate before the 5- HT/5-HT cells. Expand
Rotifer muscles as revealed by phalloidin‐TRITC staining and confocal scanning laser microscopy
By combining phalloidin-TRITC staining with confocal scanning laser microscopy (CSLM), the pattern of the musculature in two species of Rotifera, Euchlanis dilatata unisetata and Brachionus… Expand
The flatworm nervous system: pattern and phylogeny.
The ultrastructural studies of neuronal cells indicating that a common secretory cell type containing dense-core vesicles is archaic and a likely progenitor cell type for conventional neurons of advanced flatworms and that an independent evolution of synaptic structures and glial cells has occurred inside the flatworm taxon are dealt with. Expand
The brain of the Nemertodermatida (Platyhelminthes) as revealed by anti-5HT and anti-FMRFamide immunostainings.
It is demonstrated that the Nemertodermatida have neither a 'commissural brain' structure similar to that of the Acoela, nor a 'true', ganglionic brain and orthogon, typical for other Platyhelminthes. Expand
Organization of the orthogon – main and minor nerve cords
The central nervous system of flatworms has been regarded as comprised of the bilobed brain, the longitudinal cords and the connecting transverse commissures forming a so called orthogon, but support for the special status of the main nerve cords has been obtained from studies of the neuroanatomy of Catenulida, Macrostomida, Proseriata, Tricladida and Lecithoepitheliata. Expand
Rotifer nervous system visualized by FMRFamide and 5-HT immunocytochemistry and confocal laser scanning microscopy
We present the first results of immunocytochemical (ICC) observations on serotonin (5-HT) and FMRFamide (Phe-Met-Arg-Phe-NH2) immunoreactivity patterns in the rotifer nervous system investigated… Expand