Vertebrate Head Metamerism: The Current State of an Old Problem
Vertebrate Head Metamerism: The Current State of an Old Problem
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脊椎动物头部同色异谱：老问题的现状
DOI：
10.1134/s1062359019070112
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发表时间：
2019
期刊：
影响因子：
0.5
通讯作者：
S. A. Yastrebov
中科院分区：
文献类型：
--
作者：
S. A. Yastrebov
脊椎动物头部同色异谱现象的问题在200多年前首次提出。这个问题产生了两种方法：节段主义，它依赖于典型的头部节段的模型，和反节段主义，它完全拒绝头节的存在。事实可能就在中间的某个地方。头部中胚层、颅神经嵴和颅神经的发育数据表明，脊椎动物头部有五个变节：前下颌骨、下颌骨、舌骨、第一后舌骨和第二后舌骨。根据F. Edgeworth的假说认为，头后展是迷走神经后节内内脏弓聚合的结果，最初仅包括第二后舌骨弓。Gegenbaur，最初，内脏弓在该地区较多，鳃神经合并成一个单一的迷走神经系统只是次要的。寒武纪古生物学可能有助于解决这一争议。在任何情况下，脊椎动物头部的同色异谱主要是异序的（如P.P.伊万诺夫所解释的）：下颌前和下颌同色异谱在形态上是非典型的，并且位于Hox基因表达区之外。发育生物学表明，其他同色异谱动物的身体是根据类似的原则排列的。
The problem of vertebrate head metamerism was first posed more than 200 years ago. This issue gave rise to two approaches: segmentalism, which relies on the model of the typical head segment, and antisegmentalism, which rejects the existence of cephalic segments altogether. The truth, probably, lies somewhere in the middle. Data on the development of the head mesoderm, cranial neural crest, and cranial nerves lead to the conclusion that there are five metameres in the vertebrate head: premandibular, mandibular, hyoid, 1st metahyoid, and 2nd metahyoid. According to the hypothesis of F. Edgeworth, this number of head metameres is primary; the head spreading back occurred as a result of the polymerization of visceral arches inside the nervus vagus metamere which had originally included only the 2nd metahyoid arch. According to the hypothesis of C. Gegenbaur, initially, the visceral arches were more numerous in this area and the branchial nerves merged into a single nervus vagus system only secondarily. The Cambrian paleontology may assist in resolving this controversy. In any case, vertebrate head metamerism is primarily heteronomous (as interpreted by P.P. Ivanov): the premandibular and mandibular metameres are morphologically atypical and lie beyond the Hox gene expression zone. Developmental biology shows that the bodies of other metameric animals are arranged on the basis of similar principles.
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影响因子：
2.6
作者：
Schilling,ThomasF
通讯作者：
Schilling,ThomasF
两栖动物的颅肌：颅神经嵴细胞的发育、新颖性和作用
影响因子：
2.4
作者：
Schmidt;Piekarski N. ;Olsson
通讯作者：
Olsson
影响因子：
--
作者：
William A. Muñoz;P. Trainor
通讯作者：
William A. Muñoz;P. Trainor
影响因子：
1.5
作者：
Olsson
通讯作者：
Olsson