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首页> 外文期刊>Journal of nannoplankton research: A publication of the International Nannoplankton Association >A semi-automatic two-dimensional image system for studying the skeletal design of the silicoflagellate genus Corbisema (Dictyochales, Dictyochophyceae)
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A semi-automatic two-dimensional image system for studying the skeletal design of the silicoflagellate genus Corbisema (Dictyochales, Dictyochophyceae)

机译：半自动二维图像系统，用于研究硅鞭毛科Corbisema（Dictyochales，Dictyochophyceae）的骨骼设计

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摘要

Variations in skeletal morphology can provide valuable information on silicoflagellate classification and evolution, as well as the ontogenetic process of skeleton formation; however, measuring hundreds of individual skeletons can be time-consuming, and there are few, if any, existing morphometric programs that can be used to study the triangular skeletons of Corbisema. Thus, a morphometric program previously designed to measure Stephanocha (=Distephanus) spp. was modified to investigate Corbisema spp., using C. apiculata from Mors, Denmark (early Eocene) as a test case. Although the obtained sample set contains specimens with and without pikes, as well as differences in the pike-strut distance, some basic statements can be made: (1) In general, the basal ring is an isosceles triangle with two equal sides and one slightly shorter side, and (2) radial spine length and basal side length both exhibit a unimodal distribution. The distance between the pike and strut ranges from 0 to 5μm, with a mean distance/ skeleton of 0-1μm representing 77% of the total specimens, and that of >2μm representing 3%. This may be related to their double skeleton configuration, with specimens lacking pikes or with large distances between pike and strut possibly associated with a 'corner-to-corner' configuration, while those with pikes close to the struts forming 'Star- of-David' configurations. The taxonomic implications of this result are discussed in relation to the recent literature.
机译：骨骼形态的变化可以提供有关鞭毛硅藻分类和进化以及骨骼形成的个体发育过程的有价值的信息。但是，测量数百个单独的骨架可能会很耗时，并且几乎没有（如果有）可用于研究Corbisema三角形骨架的现有形态计量学程序。因此，以前设计用来测量Stephanocha（= Distephanus）spp的形态计量程序。使用来自丹麦莫斯（始新世早期）的C. apiculata作为测试用例，对其进行了修改以研究Corbisema spp.。尽管所获得的样本集包含带有和不带有派克的标本，以及派克-撑杆距离的差异，但可以做出一些基本说明：（1）通常，基环是等腰三角形，等边三角形有两个相等的边，一个稍较短的一侧，以及（2）radial骨的脊柱长度和基侧的长度均显示出单峰分布。派克与支杆之间的距离范围为0至5μm，平均距离/骨架为0-1μm，占标本的77％，>2μm的平均距离/为3％。这可能与它们的双骨架构型有关，标本缺乏长矛或长矛与支柱之间的距离较大，可能与“角到角”构型相关，而长矛接近支柱的试样则形成“大卫之星”的配置。结合最近的文献讨论了该结果的分类学意义。

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