Ultrastructure and cuticle formation of the carapace in the myodocopan ostracod exemplified by Euphilomedes japonica (Crustacea: Ostracoda)

Ultrastructure and cuticle formation of the carapace in the myodocopan ostracod exemplified by Euphilomedes japonica (Crustacea: Ostracoda)
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以 Euphilomedes japonica 为代表的 myodocopan 介形类甲壳的超微结构和角质层形成(甲壳类:介形类)

DOI:
10.1002/jmor.20985
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发表时间:
2019
影响因子:
1.5
通讯作者:
Shinnosuke Yamada
Shinnosuke Yamada
中科院分区:
医学4区
文献类型:
--
作者:
Higo;A.;Kawashima;T.;Borg;M.;Zhao;M.;Lopez-Vidriero;I.;Sakayama;H.;et al. (他18名);伊藤 道彦;Shinnosuke Yamada

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利用扫描电镜和透射电镜研究了日本真介形虫(Euphilomedesjaponica)角质层的超微结构和形成过程。外板角质层由四层组成:上角质层、外角质层、内角质层和膜层,类似于其他节肢动物的角质层。外角质层和内角质层钙化良好,有机基质在两个角质层内发育。新角质层的最外层(上角质层)首先分泌,内层(外角质层、内角质层和膜层)在蜕皮前和蜕皮后阶段近端添加。钙化发生在整个地区的甲壳在同一时间与有机基质的合成内角质层。本研究表明,在超微结构和角质层的形成,在myodocopans与podocopans不同,和myodocopans甲壳已经实现了结构多样性,以适应不同的生活方式。
The ultrastructure and formation of the cuticle of a myodocopan ostracod,Euphilomedes japonica,are investigated utilizing scanning and transmission electron microscopy. The outer lamella cuticle consists of four layers; epicuticle, exocuticle, endocuticle, and membranous layer like in the cuticle of other arthropods. The exocuticle and endocuticle are well‐calcified and the organic matrix develops within the both cuticles. The outermost layer of new cuticle (epicuticle) is secreted first and the inner layers (exocuticle, endocuticle and membranous layer) are added proximally in the pre‐, and postmoult stages. The calcification takes place in the whole area of carapace at the same time together with the synthesis of organic matrix within the endocuticle. This study demonstrates that the ultrastructure and formation of the cuticle in myodocopans are different from those in podocopans, and that the myodocopan carapaces have achieved a structural diversity for adaptation to different lifestyles.
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