Regional differentiation of the cuticular surface structure in the mesoparasitic copepod Cardiodectes shini (Siphonostomatoida: Pennellidae) on a pygmy goby
Regional differentiation of the cuticular surface structure in the mesoparasitic copepod Cardiodectes shini (Siphonostomatoida: Pennellidae) on a pygmy goby
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侏儒虾虎鱼中寄生桡足类 Cardiodectes shini（Siphonostomaidae：Pennellidae）表皮表面结构的区域分化
DOI：
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发表时间：
2016
影响因子：
0.7
通讯作者：
D. Uyeno
中科院分区：
文献类型：
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作者：
E. Hirose;D. Uyeno
Shini是一种寄生在侏儒虾虎鱼头上的中寄生桡足类动物。桡足类的头胸部和触角突插入宿主组织，而躯干和卵囊则留在宿主外。触角突、头胸部和躯干的上表皮表面的超微结构不同。在触角过程中，上表皮显得模糊，电子密度低于身体其他部位。这种疏松的角质层结构可能与寄主血淋巴吸收营养物质有关。头胸部和躯干有一个电子致密的上表皮：有一个微小的突起阵列上的头胸部的上表皮，而躯干角质层没有突起。这一系列的突起可能参与抑制宿主的免疫反应，因为头胸部与宿主的结缔组织直接接触，并且在其他寄生桡足类动物的宿主组织上也发现了类似的结构。
Cardiodectes shini is a mesoparasitic copepod found on the heads of pygmy gobies. The copepod inserts its cephalothorax with antennary processes into the host tissues, while the trunk and egg sacs remain outside the host. The ultrastructure of the epicuticle surface differs among the antennary processes, cephalothorax, and trunk. In the antennary process, the epicuticle appears fuzzy and is less electron-dense than other parts of the body. This loose cuticle structure may be related to the absorption of nutrients in the host hemolymph. The cephalothorax and trunk have an electron-dense epicuticle: there is an array of minute protuberances on the epicuticle of the cephalothorax, whereas the trunk cuticle has no protuberances. This array of protuberances might be involved in suppression of the host immune response, because the cephalothorax has direct contact with the host connective tissues and similar structures are found on other parasitic copepods inhabiting host tissue.