The basic organization of the Plathelminthes |
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| Authors: | Ulrich Ehlers |
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| Affiliation: | (1) II. Zoologisches Institut und Museum der Universität Göttingen, Berliner Strasse 28, D-37073 Göttingen, Germany |
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| Abstract: | The basic organization of the Plathelminthes is summarized. Special attention is given to epidermal structures, musculature, extracellular matrices, nervous system and sensory structures, digestive system, totipotent stem cells, protonephridia, reproductive system and life cycle. The latest common ancestor of the Plathelminthes lacked any  parenchymal cells and tissues; Plathelminthes do not represent Parenchymia. Discussions concerning the relationships of the Plathelminthes with other Metazoa must be based on the characteristics of the plathelminth stem species. |
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| Keywords: | basic organization stem species phylogenetics Plathelminthes Platyhelminthes |
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