Age-related ultrastructural characterizations of the teeth of the white grouper (Epinephelus aeneus) in the different three age-stages,Microscopy Research and Technique

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Age-related ultrastructural characterizations of the teeth of the white grouper (Epinephelus aeneus) in the different three age-stages
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2021-01-10 , DOI: 10.1002/jemt.23670
Mohamed Alsafy ₁ , Naglaa F Madkour ₁ , Raafat El-Bakary ₁ , Ashraf Karkoura ₁ , Samir El-Gendy ₁ , Mohamed A Zaki ₂ , Mahmoud Tanekhy ₃ , Mohamed M A Abumandour ₁

Affiliation

This study represents the first attempt to describe ultrastructural features of teeth in different three ages of white grouper (Epinephelus aeneus) grossly and by the aid of the electron microscope. The current study depends on 18 oropharyngeal cavity of E. aeneus from each age-stages. There are common and special characterization between each age. Five teeth bands in the roof (incisive, canine, upper molar, palatine, and vomer), while two bands in the floor (incisive, molar). The apical teeth part resembles the arrowhead that bordered by groove distally. In 5 cm age, small upper incisive teeth had two appearance (straight and curved), and vomer teeth arranged in triangular in only one row (while, in 12 cm fish arranged in two rows and in 15 cm fish arranged in more than two rows), the palatine teeth began rostrally as one row then two rows and terminated by one row, while in other two ages began by two, then three and ended by two rows. There is no canine teeth in lower jaw in all age. In 12 cm fish, the rostral row of lower incisive teeth usually contain small straight teeth, while the posterior row mainly contain large with some medium upper incisive teeth. In 18 cm fish, upper incisive teeth located within two incisive fossa that separated from each other by longitudinal part of T-shaped upper incisive ridge and small incisive teeth had two appearance (straight and curved), and each canined teeth group contain four teeth (while in other two ages each group contain only two canine teeth).

中文翻译：

白石斑鱼 (Epinephelus aeneus) 不同三个年龄阶段牙齿的年龄相关超微结构特征

这项研究是首次尝试借助电子显微镜粗略地描述白石斑鱼 ( Epinephelus aeneus )不同三个年龄的牙齿超微结构特征。目前的研究依赖于E. aeneus 的18 个口咽腔从各个年龄阶段。每个时代之间都有共同的和特殊的表征。顶部有五个齿带（切齿、犬齿、上臼齿、腭和犁骨），而底部有两个齿带（切齿、臼齿）。顶齿部分类似于箭头，远端有凹槽。5cm龄时，小上切牙有两种外观（直和弯曲），犁齿呈三角形排列仅一排（而12cm鱼排成两排，15cm鱼排成两排以上)，腭牙从嘴开始一排，然后两排，最后一排，而在其他两个时代，两排开始，然后是三排，最后两排。所有年龄段的下颌都没有犬齿。在 12 厘米的鱼中，下切牙的喙排通常包含小的直齿，而后排主要有大的和一些中等的上切牙。在18 cm鱼中，位于T形上切嵴纵向部分与小切牙相隔的两个切窝内的上切牙有两种外观（直的和弯曲的），每个尖牙组包含四颗牙齿（而在其他两个年龄段，每组只包含两颗犬齿）。

更新日期：2021-01-10

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