The thorax musculature of Anisoptera (Insecta: Odonata) nymphs and its evolutionary relevance
The thorax musculature of Anisoptera (Insecta: Odonata) nymphs and its evolutionary relevance
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DOI：
10.1186/1471-2148-13-237
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发表时间：
2013-11-01
影响因子：
3.4
通讯作者：
Hoernschemeyer, Thomas
中科院分区：
文献类型：
--
作者：
Buesse, Sebastian;Hoernschemeyer, Thomas
背景：在有翅昆虫（翼类）中，蜻蜓目（龙和豆娘）由于多种原因而显得特殊。它们是严格的空中捕食者，表现出卓越的飞行能力，其胸部形态在肌肉的排列和数量方面与其他翼类动物有显着不同。即使在一个个体中，若虫阶段和成虫阶段的肌肉组织也存在显着差异。结果：在这里，我们对蜻蜓（异翅目）若虫的胸部肌肉组织进行了比较形态学研究。我们调查了 Libellulidae、Aeshnidae 和 Cordulegasteridae 的代表，发现了 71 块肌肉：19 块肌肉位于前胸，26 块位于中胸，27 块位于后胸。其中九块肌肉以前在蜻蜓目中是未知的，而对于七块肌肉在新翅目胸部中无法识别出同源肌肉。结论：我们的结果支持并扩展了蜻蜓目和新翅目胸部肌肉组织的同源性假设，从而补充了我们对翼龙进化的理解，并为包括翼龙所有亚类的系统发育分析提供了额外的特征。
Background: Among the winged insects (Pterygota) the Odonata (dragon- and damselflies) are special for several reasons. They are strictly aerial predators showing remarkable flight abilities and their thorax morphology differs significantly from that of other Pterygota in terms of the arrangement and number of muscles. Even within one individual the musculature is significantly different between the nymphal and adult stage.Results: Here we present a comparative morphological investigation of the thoracic musculature of dragonfly (Anisoptera) nymphs. We investigated representatives of the Libellulidae, Aeshnidae and Cordulegasteridae and found 71 muscles: 19 muscles in the prothorax, 26 in the mesothorax and 27 in the metathorax. Nine of these muscles were previously unknown in Odonata, and for seven muscles no homologous muscles could be identified in the neopteran thorax.Conclusion: Our results support and extend the homology hypotheses for the thoracic musculatures of Odonata and Neoptera, thus supplementing our understanding of the evolution of Pterygota and providing additional characters for phylogenetic analyses comprising all subgroups of Pterygota.