Forever love: the Hitherto earliest record of copulating insects from the middle jurassic of China.
Forever love: the Hitherto earliest record of copulating insects from the middle jurassic of China.
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永恒的爱：迄今为止中国中侏罗世昆虫交配的最早记录
DOI：
10.1371/journal.pone.0078188
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Ren D
中科院分区：
文献类型：
--
作者：
Li S;Shih C;Wang C;Pang H;Ren D
研究背景昆虫的交配行为已被广泛研究。然而，在昆虫化石记录中，交配个体的情况特别罕见，大多数情况下都保存在琥珀中，而在压缩化石中只有极少数情况。这在很大程度上限制了我们对中生代交配位置和生殖器方向的了解，并阻碍了我们对现代生态系统这一主要组成部分中交配行为进化的理解。主要发现在这里，我们报告了一对交配蛙，Anthoscytina perpetua sp. nov.，产于中国东北中侏罗世，属原尾科。它们的交配姿势为腹对腹，雄性的触角插入雌性的交配囊。雄性动物的第8 - 9腹节离断，表明这些节段在交配期间扭曲和弯曲。由于潜在的埋藏效应，我们不能排除它们可能采取并排的位置，就像现存的蛙人一样。雌雄生殖器在原生殖器的基础上，呈对称结构。结论/意义我们的研究结果与现存的蛙蝶一致，表明蛙蝶的生殖对称性和交配位置在超过1.65亿年的时间里保持不变。
Background Mating behaviors have been widely studied for extant insects. However, cases of mating individuals are particularly rare in the fossil record of insects, and most of them involved preservation in amber while only in rare cases found in compression fossils. This considerably limits our knowledge of mating position and genitalia orientation during the Mesozoic, and hinders our understanding of the evolution of mating behaviors in this major component of modern ecosystems. Principal Finding Here we report a pair of copulating froghoppers, Anthoscytina perpetua sp. nov., referable to the Procercopidae, from the Middle Jurassic of northeastern China. They exhibit belly-to-belly mating position as preserved, with male's aedeagus inserting into the female's bursa copulatrix. Abdominal segments 8 to 9 of male are disarticulated suggesting these segments were twisted and flexed during mating. Due to potential taphonomic effect, we cannot rule out that they might have taken side-by-side position, as in extant froghoppers. Genitalia of male and female, based on paratypes, show symmetric structures. Conclusions/Significance Our findings, consistent with those of extant froghoppers, indicate froghoppers' genitalic symmetry and mating position have remained static for over 165 million years.
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影响因子：
4.8
作者：
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通讯作者：
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影响因子：
0.9
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
Wang, Bo;Szwedo, Jacek;Zhang, Haichun
通讯作者：
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