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Indirect evidence for ecophenotypic plasticity in radular dentition of Littoraria species (Gastropoda: Littorinidae)

机译:荔枝尿布尿道尿道牙列的生态型可塑性的间接依据(胃肠杆菌:Littorinidae)

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摘要

In examination of radulae from all but one of the 36 species of the littorinid genus Littoraria, extraordinary intraspecific variation was found in those occurring on a range of substrates. Radulae from rock showed a less well developed 'hood' on the rachidian tooth, a strikingly enlarged major cusp on each of the five central teeth, fewer cusps on the outer marginal teeth and the radular ribbon was longer, when compared with radulae of conspecifics from plant substrates. The radulae of species found exclusively on rock differed in similar ways from those restricted to plant substrates (mangroves, driftwood and saltmarsh). It is suggested that this may be an example of phenotypic plasticity of radular form, induced by substrate and/or diet, as recently shown experimentally in another littorinid genus. The mechanism of inducible plasticity deserves further study. Ecotypic variation in the radula may be widespread in littorinids, and radular characters should therefore be used with caution in studies of taxonomy, phylogeny and adaptation.
机译:在从所有Littorinid Genus Littoraria的所有除草属植物中的所有之一进行射云的检查中,在一系列基材上发生了非凡的内化变异。来自岩石的射线在Rachidian牙齿上显示出不太好的“罩”,在五个中央牙齿中的每一个上的每个尖锐的尖端,外部边缘齿上的尖端较少,当与来自植物基材。专门发现岩石的物种的径向不同的方式不同的方式与植物基材(红树林,漂流木材和盐沼)的那些。建议这可以是由底物和/或饮食诱导的乳型形式的表型可塑性的一个例子,如最近在另一种含有的含有littorinid属中所示的。诱导可塑性的机制值得进一步研究。罗布拉葡萄酒中的生态型变化可能是裂片胰岛素的广泛,因此在分类学,系统发育和适应的研究中,应谨慎使用乳化物特征。

著录项

  • 来源
    《Journal of Molluscan Studies》 |1999年第3期|共16页
  • 作者

    Reid DG; Mak YiuMing; Mak YM;

  • 作者单位

    Institut fur Experimentalphysik Universitat Wien Boltzmanngasse 5 A-1090 WIEN Austriahttp://www.mat.univie.ac.at/~kratt. Fakult?t für Mathematik Universit?t Wien Nordbergstra?e 15 A-1090 Vienna Austria;

    Institut fur Experimentalphysik Universitat Wien Boltzmanngasse 5 A-1090 WIEN Austriahttp://www.mat.univie.ac.at/~kratt. Fakult?t für Mathematik Universit?t Wien Nordbergstra?e 15 A-1090 Vienna Austria;

    Institut fur Experimentalphysik Universitat Wien Boltzmanngasse 5 A-1090 WIEN Austriahttp://www.mat.univie.ac.at/~kratt. Fakult?t für Mathematik Universit?t Wien Nordbergstra?e 15 A-1090 Vienna Austria;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 动物分类学(系统动物学);
  • 关键词

    mangroves; phylogeny; taxonomy; salt marshes; morphology; phenotypes; ecology; adaptation; snails; Gastropoda; Mollusca;

    机译:红树林;系统发生;分类;盐沼;形态;表型;生态学;适应;蜗牛;胃肠道;MOLLUSCA;

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