Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus.
Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus.
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DOI：
10.1002/cne.21942
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发表时间：
2009-03-10
期刊：
影响因子：
--
通讯作者：
Tomsic D
中科院分区：
文献类型：
--
作者：
Sztarker J;Strausfeld N;Andrew D;Tomsic D
甲壳动物是分布最广泛的节肢动物之一，占据了许多生态和表现出各种各样的复眼光学，但与昆虫相比，相对知之甚少的组织和神经元的形态，其潜在的视神经柱。大多数研究仅限于描述第一个神经元--椎板--表明不同物种的细胞类型大致相当。然而，这些研究局限于他们识别的神经元类型，并且大多数忽略了它们的拓扑关系。同样不确定的是，相似性是否独立于视觉生态。本帐户描述和比较的形态和单极和其他传出神经元的处置，以及组织的切向和较小的离心神经元在两个grapsoid蟹，一个从S。大西洋，另一个来自北大西洋。太平洋是如此由于这些物种占据了明显不同的生态，我们问这是否可能反映在视觉系统最外围水平的细胞排列差异。本研究确定这样的差异与离心神经元的组织板。我们还确定在这两个物种中的神经元的层，迄今尚未确定在甲壳类动物，我们绘制的层状组织的grapsoid板和分层的薄片昆虫之间的具体比较。
Crustaceans are among the most extensively distributed arthropods, occupying many ecologies and manifesting a great variety of compound eye optics; but in comparison with insects, relatively little is known about the organization and neuronal morphologies of their underlying optic neuropils. Most studies, which have been limited to descriptions of the first neuropil - the lamina - suggest that different species have approximately comparable cell types. However, such studies have been limited with regard to the types of neurons they identify and most omit their topographic relationships. It is also uncertain whether similarities, such as they are, are independent of visual ecologies. The present account describes and compares the morphologies and dispositions of monopolar and other efferent neurons as well as the organization of tangential and smaller centrifugal neurons in two grapsoid crabs, one from the S. Atlantic, the other from the N. Pacific. Because these species occupy significantly disparate ecologies we ask whether this might be reflected in differences of cell arrangements within the most peripheral levels of the visual system. The present study identifies such differences with respect to the organization of centrifugal neurons to the lamina. We also identify in both species neurons in the lamina that have hitherto not been identified in crustaceans and we draw specific comparisons between the layered organization of the grapsoid lamina and layered laminas of insects.