Cytomorphological Studies in Dugesia species of Iran.
2000
Ghorbani, B., Razi Vaccine and Serum Research Institute. Tehran. Iran, | Sheidai, M., Razi Vaccine and Serum Research Institute. Tehran. Iran, | khazab, M., Razi Vaccine and Serum Research Institute. Tehran. Iran,
The fresh water planarians belong to the phylum platyhelminthes, an old monophyletic group, which branched from the rest of metazoans at an early stage and b considered as the sister group of other bilateral triploblastic organisms. They possess a great morphological plasticity and regeneration power and are remgeneration power and are remarkable for the occurrence of local polyploidy ploulations and the occasional presence of mixoploidy and mosaics having both diploid and triploid tissues, there has been no report from Iran. Dugesia species of karaj River were investigated from cytological and morpho-anatomical point of view. Two different populations were studied. Individuals from Gajereh rejon possessed 2n=25 and those of Gachsar possessed 2n=26. They varied in details of karyotypes, G-binding pattern and morpho-anatomical feature. Cluster analysis separated the two population of Dugesia in different clusters. Two new species of Dugesia with new chromosome number having complete asexual reproduction are reported.
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