The lateral line system of hagfishes (Craniata: Myxinoidea)
The lateral line system of hagfishes (Craniata: Myxinoidea)
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DOI：
10.1111/j.1463-6395.1997.tb01010.x
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发表时间：
1997-07-01
期刊：
影响因子：
1.2
通讯作者：
Northcutt, RG
中科院分区：
文献类型：
--
作者：
Braun, CB;Northcutt, RG
用电子显微镜、组织学和免疫细胞化学技术相结合的方法描述了石斑鱼外周侧线系统的形态。粘液的表皮和脑神经也被检查，以寻找侧线系统的证据。结合其他研究人员以前发表的结果，我们得出结论，大多数或所有的七鳃鳗都有一个由浅沟或沟槽组成的侧线系统，内衬着一类单一的瓶状感受器细胞。没有任何种类的粘液鳗被证明拥有这个系统的任何组成部分。上纹状体存在三组侧线沟槽：视前、视后背侧和视后腹侧。视前沟由一对有神经节的脑神经支配，而两条视后沟由一对分别拥有两个神经节的脑神经支配，这可能是两对有神经节的神经融合的结果。形态计量学分析表明，这些沟在整个生命过程中都在继续生长，动物之间沟分布的差异可能是由于侧线个体发育的发育不稳定造成的。感受器的形态与脊椎动物侧线系统的神经肥大和其他脊索动物的纤毛感受器细胞相比较。鳗鱼侧线受体的形态可能代表了有颅侧线器官的原始状态，或者更可能的是，它们是高度退化进化的结果。(C)1997年瑞典皇家科学院。爱思唯尔科学有限公司出版。
The morphology of the peripheral lateral line system in Eptatretus stoutii is described using a combination of electron microscopical, histological and immunocytochemical techniques. The epidermis and cranial nerves of Myxine glutinosa were also examined for evidence of a lateral line system. Together with results previously published by other researchers, we conclude that most or all eptatretid hagfish possess a lateral line system composed of shallow trenches, or grooves, lined with a single class of flask-shaped receptive cells. No species of myxinid hagfish has been shown to possess any component of this system. Three groups of lateral line grooves are present in eptatretids: preoptic, dorsal postoptic, and ventral postoptic groups. The preoptic grooves are innervated by a single pair of ganglionated cranial nerves and the two postoptic series of grooves are innervated by a pair of cranial nerves which each possess two ganglia, possibly as a result of fusion of two pairs of ganglionated nerves. Morphometric analysis indicates that these grooves continue to grow throughout life and that the variability in the distribution of grooves between animals may result from developmental instability in lateral line ontogeny. The morphology of the receptive organs is compared to neuromasts of the vertebrate lateral line system and ciliated receptor cells of other chordates. The morphology of hagfish lateral line receptors may represent the primitive condition for craniate lateral line organs, or more likely, they are highly derived as a result of regressive evolution. (C) 1997 The Royal Swedish Academy of Sciences. Published by Elsevier Science Ltd.