Early embryonic development of the head region of Gryllus assimilis Fabricius, 1775 (Orthoptera, Insecta)
Early embryonic development of the head region of Gryllus assimilis Fabricius, 1775 (Orthoptera, Insecta)
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DOI：
10.1016/j.asd.2010.05.008
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发表时间：
2010-09-01
影响因子：
2
通讯作者：
Waloszek, Dieter
中科院分区：
文献类型：
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作者：
Liu, Yu;Maas, Andreas;Waloszek, Dieter
我们报告了对 Gryllus assimilis 胚胎发育的研究，特别关注头部。扫描电子显微镜（SEM）图像揭示的重要发现包括：（1）触角前叶代表最前部，不带有任何附属物； (2) 每个叶由中央区和边缘区组成； (3)中央区域发育为原大脑和视叶，边缘区域发育为头囊前部； (4)触角段的初始位置位于口部区域的后方； (5) 附肢原基暂时存在于闰节中，随后随闰节本身消失； (6) 凸出的胸骨似乎从下颌骨、上颌骨和唇节的腹侧表面发育而来。然后对昆虫纲的胚胎特征进行比较，并进一步扩展到蜘蛛（Araneae、Chelicerata）的胚胎。昆虫和蜘蛛胚胎的最前部区域具有惊人的相似性，这使作者得出结论，应该进一步进行这种比较以涵盖整个节肢动物。这将有助于我们了解节肢动物头部的胚胎学和进化。 (C) 2010 Elsevier Ltd. 保留所有权利。
We report our investigations on the embryonic development of Gryllus assimilis, with particular attention to the head. Significant findings revealed with scanning electron microscopy (SEM) images include: (1) the pre-antennal lobes represent the anterior-most segment that does not bear any appendages; (2) each of the lobes consists of central and marginal regions; (3) the central region thereof develops into the protocerebrum and the optic lobes, whereas the marginal region thereof becomes the anterior portion of the head capsule; (4) the initial position of the antennal segment is posterior to the mouth region; (5) appendage anlagen are transitorily present in the intercalary segment, and they later vanish together with the segment itself; (6) a bulged sternum appears to develop from the ventral surface of the mandibular, maxillary and labial segments. Embryonic features are then compared across the Insecta and further extended to the embryos of a spider (Araneae, Chelicerata). Striking similarities shared by the anterior-most region of the insect and spider embryos lead the authors to conclude that such comparison should be further undertaken to cover the entire Euarthropoda. This will help us to understand the embryology and evolution of the arthropod head. (C) 2010 Elsevier Ltd. All rights reserved.