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首页> 外文期刊>Hydrobiologia >Do Rotifer Jaws Grow After Hatching?
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Do Rotifer Jaws Grow After Hatching?

机译：孵化后轮虫下颌长大吗？

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摘要

The hard articulated jaws of some pseudocoelomate metazoans were recently used in reconstructing their phylogenetic relationships, but we still do not know if these structures could change in size and shape during the life of individuals, and experimental data are lacking on their post-embryonic development. Rotifers are one of the groups in which hard articulated jaws, called trophi, are well known, and are widely used taxonomically. Here we report on SEM study of trophi of rotifers of different ages, to determine if the trophi structures change in shape and/or in size during post-embryonic development. We used linear measurements and geometric morphometrics analyses from scanning electron microscopic pictures of trophi of Cupelopagis vorax, Dicranophorus forcipatus, Macrotrachela quadricornifera, Notommata glyphura, Rotaria macrura, R. neptunoida, and R. tardigrada. Results for these species show that trophi do not change after hatching, either in size or in shape. In contrast, data on Asplanchna priodonta reveal trophi growth after hatching.
机译：最近，一些假腔动物后生动物的硬关节颚被用于重建它们的系统发育关系，但我们仍然不知道这些结构在个体的生活中是否可以改变大小和形状，并且缺乏关于它们的胚胎后发育的实验数据。轮虫是众所周知的硬关节颚（称为trophi）的一种，并在分类学上得到广泛使用。在这里，我们报道不同年龄的轮虫营养素的SEM研究，以确定在胚胎发育后营养素结构是否在形状和/或大小上发生变化。我们使用了线性测量和几何形态计量学分析，从扫描电镜的杯形营养杯，盘螺，菱角，斜纹夜蛾，斜纹夜蛾，Rotaria macrura，R. neptunoida和R. tardigrada的萎缩营养的扫描电镜照片。这些物种的结果表明，在孵化后，营养杯的大小或形状都没有改变。相反，Asplanchna priodonta的数据显示孵化后的营养体生长。

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