Wakita M, Itoh K, Kobayashi S
J Morphol. 1977 Jul;153(1):129-41. doi: 10.1002/jmor.1051530109.
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 lubial 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.
以往关于低等脊椎动物牙齿替换的研究一直因缺乏通用的综合方法而受到困扰，这使得无法进行系统发育综合分析。本研究基于小鳞锯尾吊（Prionurus microlepidotus）颌骨的连续切片。每个牙胚根据其发育阶段及其在颌骨中的位置进行特征描述。牙胚发育阶段与颌骨位置之间的关系已得到研究，并通过几幅图表进行了展示。得出了以下结论：（1）小鳞锯尾吊牙胚的起始受两排牙齿控制，它们分别以交替模式在功能牙的舌侧和唇侧起始牙胚。（2）因此，一个位点的功能牙由舌侧和唇侧牙胚的交替萌出提供。（3）每个位点牙齿替换的推进独立于相邻位点的功能牙及其后续牙。（4）替换模式的紊乱是由于连续牙胚交替萌出速率的变化，这是对功能牙异常脱落的一种反应。
