Ultrastructure and Morphology of Compound Eyes of the Scorpionfly Panorpa dubia (Insecta: Mecoptera: Panorpidae).
Ultrastructure and Morphology of Compound Eyes of the Scorpionfly Panorpa dubia (Insecta: Mecoptera: Panorpidae).
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DOI：
10.1371/journal.pone.0156970
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Hua BZ
中科院分区：
文献类型：
--
作者：
Chen QX;Hua BZ
长翅目昆虫是全变态昆虫中最独特的一类，其幼虫具有复眼。在本研究中的细胞组织和形态的复眼的成虫蝎蛉Panorpa dubia在长翅目进行了研究，光，扫描电子显微镜和透射电子显微镜。结果表明，成虫复眼为并置型，每只眼由1200多个小眼组成。小眼由一个角膜、一个由四个视锥细胞、八个光感受器、两个初级色素细胞和18个次级色素细胞组成的晶体锥组成。成年小眼有一个融合的有八个光感受器的感杆。七个光感受器从晶锥的近端延伸到基底基质，而第八个光感受器较短，从光感受器簇的中间水平延伸到基底基质。融合的感杆体由不同光感受器的感杆体在不同水平上组成。成虫小眼与幼虫小眼具有相同的细胞成分，但分层方案不同。
Mecoptera are unique in holometabolous insects in that their larvae have compound eyes. In the present study the cellular organisation and morphology of the compound eyes of adult individuals of the scorpionfly Panorpa dubia in Mecoptera were investigated by light, scanning electron, and transmission electron microscopy. The results showed that the compound eyes of adult P. dubia are of the apposition type, each eye comprising more than 1200 ommatidia. The ommatidium consists of a cornea, a crystalline cone made up of four cone cells, eight photoreceptors, two primary pigment cells, and 18 secondary pigment cells. The adult ommatidium has a fused rhabdom with eight photoreceptors. Seven photoreceptors extend from the proximal end of the crystalline cone to the basal matrix, whereas the eighth photoreceptor is shorter, extending from the middle level of the photoreceptor cluster to the basal matrix. The fused rhabdom is composed of the rhabdomeres of different photoreceptors at different levels. The adult ommatidia have the same cellular components as the larval ommatidia, but the tiering scheme is different.