科研之友
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摘要
Synura petersenii is a common freshwater colonial flagellate. Taxonomy of the species is traditionally based on morphology of the silica scales covering its cells. Studies of scales that vary in morphology imply that S. petersenii may include several separate but closely related species. In this study we used the ITS region for a molecular analysis of several clonal cultures of S. petersenii. Analyses of these data divide the strains among six distinct clades. Identification of compensatory base changes (CBCs) and hemi-CBCs characterizing each of the six clades unequivocally confirmed the results of our ITS analysis and implied the high probability of reproduction barriers among the clades. Furthermore, morphological analyses including both traditional methods and geometric morphometrics revealed unambiguous differences in scale structure among the six clades. All of these findings allow us to consider S. petersenii a complex of species. The results also indicate that the real hidden diversity of S. petersenii is very probably much higher.
- 出版日期2010
