FINE STRUCTURE OF AESTHETASC HAIRS OF COENOBITA COMPRESSUS EDWARDS
FINE STRUCTURE OF AESTHETASC HAIRS OF COENOBITA COMPRESSUS EDWARDS
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DOI：
10.1002/jmor.1051240309
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发表时间：
1968-01-01
影响因子：
1.5
通讯作者：
CRONSHAW, J
中科院分区：
文献类型：
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作者：
GHIRADELLA, H;CASE, J;CRONSHAW, J
触角鞭毛上有短而薄壁的短突; clypeatus是一种陆生寄居蟹，与其他十足类甲壳动物的相似之处在于含有许多双极神经元的树突，其细胞体在每根毛发的基部下聚集成纺锤形团块。树突包含小根、基体和纤毛，它们在进入嗅鞘之前一分为二，因此在毛发内，每个纤毛都由一组细长的分支代表。这些美学家本身是短的、钝的，并且部分地横卧，因此每个都有暴露和未暴露的一面。暴露侧角质层较保护侧薄而纤细，树突分枝集中在其下。另一方面，受保护的一侧衬有非树突状支持细胞，并且角质层更厚，更层状，并且可能渗透性更低。所有的树突元件近端的树突分支被包围在触角鞭毛的主体，和纤毛的初始段位于一个空泡。在这些方面，Coenobita的美学更像昆虫触角上的薄壁钉，而不是迄今为止研究过的海洋十足类。陆地形态的这种趋同可能是为了满足节约用水的需要。
The aesthetascs, short thin-wailed pegs on the antennule flagella of C. clypeatus, a terrestrial hermit crab, are similar to those of other decapod Crustacea in containing the dendrites of many bipolar neurons, whose cell bodies are grouped in spindle-shaped masses beneath the bases of each hair. The dendrites contain rootlets, basal bodies, and cilia, which divide dichotomously before entering the aesthetasc, so that within the hair, each cilium becomes represented by a group of slender branches. The aesthetascs themselves are short, blunt, and partially recumbent so that each has an exposed and an unexposed side. The cuticle on the exposed side is thinner and more tenuous than that on the protected side, and the dendrite branches are concentrated just underneath. The protected side, on the other hand, is lined with non-dendritic supporting cells, and the cuticle is thicker, more lamellar, and probably less permeable. All dendritic elements proximal to the dendrite branches are enclosed within the main body of the antennular flagellum, and the initial segments of the cilia lie within a vacuole. In these respects, the aesthetascs of Coenobita resemble the thin-walled pegs on insect antennae more than they do those of the marine decapods thus far examined. This convergence in the terrestrial forms may be in response to the need to conserve water.