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The rhipidoglossan radula: Radular morphology and formation in Nerita litterata Gmelin, 1791 (Neritimorpha, Neritidae)
Journal of Morphology ( IF 1.5 ) Pub Date : 2022-01-11 , DOI: 10.1002/jmor.21448 Elena Vortsepneva 1 , David G Herbert 2 , Yuri Kantor 3
Journal of Morphology ( IF 1.5 ) Pub Date : 2022-01-11 , DOI: 10.1002/jmor.21448 Elena Vortsepneva 1 , David G Herbert 2 , Yuri Kantor 3
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The rhipidoglossan radula, consisting of numerous teeth in each transverse row, is characteristic of phylogenetically distant groups of gastropods, including Vetigastropoda, Neritimorpha and ‘lower’ Heterobranchia. Previous studies have revealed the main patterns in the formation of the rhipidoglossan radula of vetigastropods, the main feature of which is the division of the formation zone into two horns, where marginal teeth are formed by a multilayered epithelium (odontoblasts). This work is devoted to the study of the formation of the rhipidoglossan radula of Nerita litterata using light and electron microscopy. The data obtained show that, despite the different external morphology of the radular sac of neritids and vetigastropods, the radular sac of N. litterata, like that of vetigastropods, is divided into two parts, in which the marginal teeth are similarly formed by odontoblasts located in more than one layer. It seems probable that this complex, three-dimensional structure of the formation zone is associated with a broad radula with numerous elongate marginal teeth and could be characteristic of other gastropods with this type of radula. Additional supporting rods located along the odontoblasts and consisting of vacuolated cells were first discovered in Nerita.
中文翻译：
rhipidoglossan radula：Nerita litterata Gmelin 的 Radular 形态和形成，1791 (Neritimorpha, Neritidae)
rhipidoglossan radula 由每个横排中的许多牙齿组成，是系统发育上遥远的腹足动物群的特征，包括 Vetigastropoda、Neritimorpha 和“下”异鳃亚目。以前的研究已经揭示了叶尾动物的齿舌齿形形成的主要模式，其主要特征是将形成区分成两个角，其中边缘牙齿由多层上皮（成牙本质细胞）形成。这项工作致力于使用光学和电子显微镜研究Nerita litterata的 rhipidoglossan radula 的形成。所获得的数据表明，尽管 neritids 和 vetigastropods 的 radular sac 的外部形态不同，但N. litterata的 radular sac，与vetigastropods一样，分为两部分，其中边缘牙齿类似地由位于不止一层的成牙本质细胞形成。形成区的这种复杂的三维结构似乎与具有许多细长边缘牙齿的宽齿部有关，并且可能是具有这种齿部的其他腹足动物的特征。沿着成牙本质细胞并由空泡细胞组成的附加支撑杆首先在Nerita被发现。
更新日期：2022-02-10
中文翻译：
rhipidoglossan radula：Nerita litterata Gmelin 的 Radular 形态和形成，1791 (Neritimorpha, Neritidae)
rhipidoglossan radula 由每个横排中的许多牙齿组成，是系统发育上遥远的腹足动物群的特征，包括 Vetigastropoda、Neritimorpha 和“下”异鳃亚目。以前的研究已经揭示了叶尾动物的齿舌齿形形成的主要模式，其主要特征是将形成区分成两个角，其中边缘牙齿由多层上皮（成牙本质细胞）形成。这项工作致力于使用光学和电子显微镜研究Nerita litterata的 rhipidoglossan radula 的形成。所获得的数据表明，尽管 neritids 和 vetigastropods 的 radular sac 的外部形态不同，但N. litterata的 radular sac，与vetigastropods一样，分为两部分，其中边缘牙齿类似地由位于不止一层的成牙本质细胞形成。形成区的这种复杂的三维结构似乎与具有许多细长边缘牙齿的宽齿部有关，并且可能是具有这种齿部的其他腹足动物的特征。沿着成牙本质细胞并由空泡细胞组成的附加支撑杆首先在Nerita被发现。
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