Morphology of the tentorium in the ant genus Lasius Fabricius (Hymenoptera: Formicidae)
Morphology of the tentorium in the ant genus Lasius Fabricius (Hymenoptera: Formicidae)
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Lasius Fabricius 蚂蚁属小幕的形态（膜翅目：蚁科）
DOI：
10.1038/s41598-019-43175-w
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发表时间：
2019
影响因子：
4.6
通讯作者：
Akira Shimizu
中科院分区：
文献类型：
--
作者：
Hiroshi Kubota;Jin Yoshimura;shuhei Niitsu;Akira Shimizu
天幕是昆虫头囊的内部骨骼。许多研究表明，天幕的结构不仅对形态学和系统学研究有重要意义，而且对植物的发生和进化也有重要意义。然而，到目前为止，只有三项研究报道了蚂蚁的小脑幕形态。本文描述了蚁科六种蚁的幕的基本结构及其微小的变异。在此基础上，我们给出了小脑幕的新术语，并给出了小脑幕的示意图。我们通过构建小脑幕和肌肉的三维图像来阐明小脑幕的肌肉附着。然后，我们验证附着区的触角肌和上颌收肌的天幕。结果表明，肌肉附着区比以前认为的要宽。我们的研究表明，理解小脑幕的演变的关键是其功能形态，与头囊内源自小脑幕的肌肉的附着有关。这是首次报道蚂蚁天幕及其附属肌肉的三维图像。小脑幕的种内和种间变异也是首次报道。
The tentorium is the internal skeleton of the head capsule of insects. Several studies have shown that the structure of the tentorium is an important factor not only for the morphology and systematics but also for the phylogeny and evolution. In ants, however, only three studies have reported tentorial morphology so far. We reveal the fundamental structure of the tentorium of the genusLasius(Hymenoptera, Formicidae) and its minor variation among six species of the genus. Based on the results, we give new terminologies of the organ, presenting a schematic diagram of the tentorium. We clarify muscle attachment to the tentorium by constructing a three-dimension image of the tentorium and muscles. We then verify the attachment areas of the antennal muscles and maxillary adductor muscles on the tentorium. The results show that the muscular attachment areas are broader than previously thought. Our study indicates that the key to understanding the evolution of the tentorium is its functional morphology, in relation to the attachments of the muscles originating from the tentorium within the head capsule. This is the first report of the three-dimensional images of the ant tentorium and its attached muscles. The intra- and inter-specific variations of the tentorium is also reported for the first time.