Tooth replacement in the teleost fish Prionurus microlepidotus Lacépède
Tooth replacement in the teleost fish Prionurus microlepidotus Lacépède
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硬骨鱼 Prionurus microlepidotus Lacépède 的牙齿替换
DOI：
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发表时间：
1977
影响因子：
1.5
通讯作者：
Shigeo Kobayashi
中科院分区：
文献类型：
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作者：
M. Wakita;Katsuhiro Itoh;Shigeo Kobayashi
以往关于低等脊椎动物牙齿替换的研究一直缺乏统一的方法和手段，无法提供系统发育的综合。本研究是基于小鳞锯尾鱼颌骨的连续切片。每个牙胚的特征在于其发育阶段和在颌骨中的位置。牙胚的发育阶段和在颌骨中的位置之间的关系已被研究并在几个图形插图中表示。结果表明：（1）小鳞鲀牙胚的发生受两个Zahnreihen控制，它们以交替的方式分别在功能牙的舌侧和唇侧发生牙胚。(2)因此，在一个位置上的功能性牙齿由舌侧和唇侧牙胚的交替萌出提供。(3)每个位点的牙齿替换的进展独立于相邻位点的功能牙齿及其后继者。(4)替换模式的紊乱是由连续牙胚的交替萌出率引起的，作为对功能牙齿异常脱落的反应。
Previous studies on tooth replacement in lower vertebrates have been plagued by a lack of common integrative approaches and methods, making it impossible to furnish a phylogenetic synthesis. This study is based on serial sections of the jaw of Prionurus microlepidotus. Each Toothgerm was characterized by its developmental stage and its position in the jaw. The relationship between the developmental stage of toothgerm and position in the jaw has been studied and expressed in several graphical illustrations. The following conclusions have been made: (1) The initiation of toothgerms in P. microlepidotus is governed by two Zahnreihen, which respectively initiate toothgerms on the lingual and labial side of the functioning teeth in an alternating pattern. (2) Therefore, functioning teeth in one locus are supplied by the alternate eruption of lingual and labial toothgerms. (3) Advancing of tooth replacement in each locus is independent of functioning teeth and their successors in adjacent loci. (4) The disorders of replacement patterns are caused by an alternated rate of eruption of successive toothgerms as a response to unusual shedding of the functioning teeth.