Some comparative fine structure relationships of the rotifer integument

Some comparative fine structure relationships of the rotifer integument
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轮虫外皮的一些比较精细结构关系

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发表时间:
1966
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通讯作者:
J. Koehler
J. Koehler
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文献类型:
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作者:
J. Koehler

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代表三个轮虫属的物种进行了研究,特别强调阐明详细的精细结构关系的外皮衍生物。在这些动物中角质化的经典概念必须加以修改,以纳入一个真正的细胞外角质层是缺乏一个物种,被认为是非常严重的角质化(甲片),即耳蜗角贝。一个一致的细胞内结构实体位于皮下质膜下被认为是迄今为止在所有轮虫中观察到的大部分增强或外骨骼材料。在Philodina中,这个“致密层”被证明是与肌肉-下皮桥粒相关的纤维束的插入点。桥粒本身是有趣的,因为它们不是以前在轮虫和无脊椎动物中观察到的分隔型,而是在高等动物中更常见的“标准”品种。
Species representing three rotifer genera have been investigated with special emphasis on elucidating the detailed fine structure relationships of integumental derivatives. The classical concept of cuticulization in these animals must be modified to incorporate the finding that a genuine extracellular cuticle is lacking in a species thought to be very heavily cuticulized (loricate) namely, Keratella cochlearis. A consistent intracellular structural entity located just beneath the hypodermal plasma membrane is thought to represent the bulk of the reinforcing or exoskeletal material observed in all rotifers thus far examined. In Philodina, this “dense layer” is shown to be an insertion point for fiber tracts associated with muscle-hypodermis desmosomes. The desmosomes are of interest in themselves since they are not of the septate type observed previously in rotifers and invertebrates in general, but are of the “standard” variety more commonly seen in higher animals.